Having used SPSS in my undergrad, I did not expect there to be so many aspects that we didn't go over during our course. I'm glad these videos are offering a refresher and a new challenge.
sorry to be offtopic but does anybody know of a method to get back into an Instagram account?? I stupidly lost the account password. I would appreciate any tips you can offer me.
OMG! So happy to find you teaching advanced stats. I am getting my doctorate and taking stats. I watch your psych videos!!! Thank you for creating this content to help fill in the gaps that my stats book doesn’t address!!!
Since I don't have first hand use with the SPSS and have only learned of it by name and never in detail this video was helpful in laying out where to find information on the spread sheet. I am not ashamed to say that many of the videos have been or will be viewed many times. Overall it did help me understand some of the terms used.
Danielle Duboski I also have never used SPSS, and I have never even heard of it before. I am glad that this portion of the class is in video form so we continue to go over it until we feel comfortable with the information. You will not be alone in viewing certain videos multiple times!
I have never used SPSS and to be honest I never heard of it until Dr. Grande mentioned it in class. However, watching and listening to Dr. Grande's step by step approach for normality made it appear easy to use. Testing for normality appears pretty straight forward, so I do not feel lost or like I do not grasp the concept.
Danielle Maldonado Danielle, I have never used SPSS either. Watching the video and seeing the steps does make it appear easy. I am sure it will take more time to fully grasp SPSS and I will need to watch this video again.
Normality tests can be measured in SPSS to determine whether they are normal or not. This particular example used 90 participants. From this one has to determine whether the pretest and posttest scores normally distributed. There were two different types of tests that were used Shaprio-Wilk test and Kolmogorov-Smirnov test. These were used to determine the validity. This was a bit confusing but I understand the general idea.
Toniette Morda I found it somewhat confusing as well, but got the basic concept. I think further practice would help! But overall, certainly a useful program in determining normality.
Before this class I have never heard of the program SPSS. When I researched what the program did I was pleasantly surprised at what it was created to do.After watching Dr. Grande's walk-through of how to calculate if the distribution is normal in a study I feel more confident about using SPSS in the future.
The video was easy to follow and Dr. Grande makes this seem so simple. This is all new to me but seeing the Normality test in SPSS gives me a better understanding. I will need more information on some of the concepts, Kolmogorov-Smirnov and Shapiro-Wilk tests, discussed.
Great video. Before doing any sort of analysis, it is important to be very familiar with the data set so that you understand what you hope to achieve and what the most appropriate process is to determine the relationship between the results that were attained and how the data is interpreted and then analyzed.
Dr. Grande- As I am familiar with SPSS- this video refreshed my memory about how to organize the plots. Interesting, SPSS is very straight forward and is error controlled, if your information is put in right. Thanks so much for the refresher!
Thank you for the video Dr. Grande. SPSS is extremely intimidating when trying to navigate all the tables and graphs created, and understanding what it all means. It was helpful to have a break down of what the numbers mean and what the graphs are showing within this video.
This video yielded many new concepts that I was unfamiliar with. However, the null and rejecting the null hypothesis is important in determining statistical significance. The SPSS system seemed to be user friendly and program features are easy to find. Very inflightfull video.
***** I used SPSS a lot in undergrad and yes it is very user friendly once you learn where all the buttons are! It will become a great tool for you to use for research.
***** It is definitely good that I can now grasp what kind of software SPSS is! I had heard references to it previously, but it didn't mean anything to me so it was nice to see how it operates.
***** I liked how Dr. Grande showed us SPSS because it did seem to be user friendly. When using SPSS in the past I did not think it was user friendly at all, but that is probablyy because I did not know what I was doing. After watching this video I believe I might be able to work with SPSS a little better.
This video was very helpful in breaking down the steps to determine how to tell if there is a normal distribution . I am not that insightful when it comes to statistics, but the video definitely explained the process in a clear and concise way.
+Nakesha Tucker I agree! The video clearly went through each step which is extremely helpful when trying to actually do this. I think once we understand these tests a bit more, this video will be even more helpful. I do feel confidant that if I were asked to find out if there is a normal distribution I would be able to do just that by following these steps.
It's been quite a while since I have used SPSS and this was a great video explaining what all the output that SPSS gives you represents. I thought the explanation of what output tells you if it is statistically significant was great. I think that showing that one test of normality is more valid than the other was important and many would not now that. I myself had forgotten that.
Having the step by step instructions is important for me to be able to utilize SPSS effectively, but this video also teaches about how to apply normality tests. I do think I would understand applying the results better if I was given an example of what the data was and what the actual null hypothesis was, but as far as reading the results and the graphs, this video was helpful in teaching me normality tests in SPSS.
It has been a long time since I have used SPSS but this video was a brief and helpful reminder. I think I will need further practice with this program, but it seems to remain very useful in determining normality and understanding significance.
I have never used SPSS. However the system seemed easy to navigate and merge with research statistics. I agree, an in depth tutorial would prove beneficial.
I have worked wit SPSS a lot in the past and I still never really understood it. I liked how this video broke down the different parts and really explained what was going on in SPSS at each part.
Dear Sir, I liked you explanation. I have a small question. 1) How to test normality when there are many independent variables ? 2) How to test normality in case of several dummy variables ?
I am not yet familiar with SPSS but I do appreciate some exposure to the information. Hopefully, as the course progresses I will understand this better. It is helpful to know that software can help organize the information and interpret the data, I will take away that the Shapiro-Wilks is considered more valid.
SPSS is so much better than excel when it comes to this kind of application. It is much more user friendly and clear, in my opinion. With that being said, I would have liked a refresher on just the basics in this video. Like, even what "normality" even is. I think our first class should have presented these basic terms so that we could follow these videos easier. Research- and math in general- do not come easy to everyone. Nor has everyone taken research class. I took my research class four years ago and I am having trouble remembering what I learned. I liked the step-by-step rundown of how to do this in SPSS. It is very clear and easy to follow. However, I can't remember what skewness and kurtosis are, so I'll need to look those up and maybe watch this video again.
Jessie Howard I definitely agree here!! I would love a run down of the basics again because I feel that I am falling just short of understanding and if I could only review those basic concepts again that I would be able to understand these more advanced concepts so much better.
I am not very comfortable nor confident with this of statistics and distributions. This video helped me to gain more insight into the subject. Although still very skeptical, I think using videos, such as this one, will help me to understand this subject matter a lot better.
Infomative viedo that gave further insight into distribution and null hypothesis. The viedo also gave step by step instructions in using the excel spreadsheet.
Regina Ames I agree that this video was informative, I am not exactly excel savvy so being able to see step by step instructions on how to use the spreadsheet was a refresher and opened my eyes to how simple it can be to utilize.
Great little reminder on rejecting or accepting the null hypothesis based on the alpha level. I do not recall learning about the Shapiro-Wilk value, so watching this prompted me to dig further online to learn about it. I wish the scope of this course was longer or larger because I would have liked to use SPSS again to do statistics. I feel like one can learn more about statistics if they are actually carrying out the equations and running the tests rather than just watching them or reading about them.
Jessica Muzzin I so enjoyed using SPSS (excel is not as user-friendly in my opinion) and would be nice to go back and learn it again.I can understand why not considering how expensive the software is, though. Due to that, unless you're frequently running statistics, you don't get to us SPSS often which is all the more reason to need to learn on it again. There are a lot of tests, a lot of values, and a lot of names to remember so, you're right, it is a lot easier understanding statistics by learning it on software like this.
I remember when I used SPSS in the past, plugging in the correct numbers and keeping everything consistent, was difficult for me, because numbers and math isn't always easy for me. I'll really need to watch this again to become more familiar and comfortable with this program.
I found this video very helpful and it was easy to follow. Once the formulas are built, inside of excel it seems to be a simple process to get the information to compute. My understanding of all of the computed information is still a fuzzy but I do have a better understanding of the normality tests in SPSS.
SPSS seems like it is a cool program and it is really interesting to see the difference between it and Excel. The names of the tests are interesting and I really liked learning how to approach them. This video was very helpful and was a good introduction to SPSS.
It was nice to see the steps and how to apply it in Excel and complete the analysis. But I had a hard time focusing on the video since it was very mathematical, as my peers previously explained. I am unfamiliar with SPSS and have never used this before. Very useful in determining normality and understanding significance.
This is another video where I feel a bit in the dark. I like how you connect the KS and SW test to the histogram and how the graphs will look as they should regarding being normally distributed as per their results. I found it useful that you explained that the point of this is that researchers want to know if a distribution is normal, and what a typical data setup in SPSS would look like.
This video was very insightful being that I have never used SPSS. It seems easy enough but I have to actually use it to get more familiar with it. I believe I have a better understanding of statically significance as well as normality. The system seems to be user friendly and structured for data entry.
Watching the various videos on normality testing helps to understand which tests are most relevant for what data. SPSS is becoming less scary with each video I watch.
I appreciated the brevity of this video as well :D Not knowing what SPSS is, it seems like a good tool for statistical things. Testing to see if a distribution is normal would be really helpful, so that's good. I really liked how much data SPSS gives out. This video helped me solidify some of the terms and their uses. Not to mention the statistically significant stuff. You threw me off when you said that the pretest was not statistically significant, but once you reminded us that the Alpha value was .05 it all came together. I'm getting there with understanding this stuff.
Jeff Pincin I'm starting to get it too, Jeff! Videos like this are really helpful because of the visual aspect. Getting to see what the distribution of the pre- and post- tests made it easier to grasp, in my opinion.
Jeff Pincin I have never used SPSS either but this video was very informative. The visuals really help bring these concepts all together. I'm not totally clear on everything research related but I am starting to get a better understanding.
Having no experience with SPSS, I am a little confused but it looks to be fairly user friendly and easy to navigate once you comprehend it's purpose and how to utilize it. It does seem a little less intimidating than Excel. It's also helpful to get a first glance at what "normally distributed" looks like in the histogram. Also, I've noted that Shapiro-Wilk is widely accepted as more valid so I will keep that in mind for the future!
Kimberly Hanna I'm with you, Kim! I liked how much data SPSS shows and how it shows the graphs and all those numbers. That will probably be important stuff as we continue forward. I wonder how much we'll actually use SPSS? Or how we could even access it?
I liked this video because I was unfamiliar with SPSS and I love how user friendly and simple it seems to be while configuring data sets for research studies. I would say however, that on the mathematical side of these concepts, I am still unsure and do not firmly understand the context. I feel like I have the basics from previous courses but because it has been a few years I need to put it back into context to truly understand.
Melissa Clendaniel I share both your love and concerns over SPSS. It seems like the program is very simple to navigate and use, but I also have concerns over understanding the information being inputted. Even the best program is useless unless we understand the results. I hope during this course I learn what the information means.
Hi, thanks you for the video :) If you have a data set resembling the one in the example were the pre test is normally distributed, but the post test is not, what statistical test should we apply?
This video is informative but it is clear that one would need more background on SPSS and when to use these specific tests. I was familiar with some of the jargon related to normal distribution and alpha learned through my previous statistics course. In order to effectively use this approach data analysis, I would need to become knowledgeable about the tests and how to sufficiently use the program to manipulate the data.
I agree Kristine. I wish I was privy to Dr. Grande's channel during my undergraduate studies. The video series using the SPSS would have been very helpful during my statistic courses. I too was familiar with some of the concepts conveyed in this video but statistics overall is a weak area of mine.
This video was a little confusing to me only because it came off as very mathematical which surely is not my strong suit.I was unfamiliar with what SPSS is as well as the purpose for it. This video was successful in providing step by step directions on how to move through the excel spreadsheet in order to find the data needed, which was not only informative but simple enough to follow. The differences and changes between the pretest and post test can be due to the way the tests analyze data differently, and that Shapiro-Wilk test was more valid.
Candace Fernandez I agree! Mathematics has always been difficult for me, and as I mentioned in my comment, I'll need to rewatch this to feel comfortable with SPSS. Although I am happy that there are videos for us to watch to become more familiar with this program.
Candace Fernandez I agree. I wrote down notes on this video and I didn't get it until it was explained in class. Not in the least a math person either!! LOL
This was so easy to follow and understand. I love SPSS as it is so easy to use and understand. I would have liked a reminder of what Kurtosis is and the meaning of the values for skewness more in depth. That having been said, the explanation of how to read the normality tests and what values to look for (that are statistically significant) was well-explained and it was good to go back over the histograms as that helps add to the last video with normal distribution. This was a good video for sharpening up skills in SPSS, particularly for people like me who have not had access to the program for a long time to practice with it.
Alicia Zahn I need a refresher on kurtosis! I forgot about that term until you mentioned it. I agree that this was a hugely helpful video to brush up on the use of SPSS. I really wish we all had access to that program as a part of this graduate program; I think using SPSS is something everyone should be familiar with because I also consider it to be much more user friendly than Excel. It is interesting and informative and provides those who are familiar with it an advantage in understanding the reporting on psychological and counseling research. Maybe it should be considered to be included in the curriculum for future cohorts.
Alicia Zahn This video was to very easy to follow. I don't have a good grasp on the reading of the normality test, but I think if we go over it in class I will be able to follow along. There was a great deal of output which is a plus.
I am struggling with research methods and theory at uni errrgh stats is another language!!!!!!!!!!! i need to maintain a distinction average, and you are helping me do that! thank you
I have never used SPSS, so I am feeling a little overwhelmed learning a new "system" in excel. However, I like that excel does the mathematical part once I plug in the correct information, which leaves me with the job of being able to decipher what the outcomes mean. I think with time, I will be able to understand this as I learn all of the terms and what they mean.
Rachel Foster SPSS is not part of Excel- it is it's own - very expensive- program. Excuse me if I am misinterpreting your comment. I find it a lot easier to use because it is made for this kind of use. I agree that it is great that these programs do the calculations for you. I just wish I knew what they all mean!
Rachel Foster I agree with you. I too, like how you can just plug numbers into Excel and it does the rest for you. However, SPSS seems to be just as user friendly.
Danielle Maldonado I agree with SPSS being as user friendly. I like how each function has the appropriate headlines to guide you should you forget or if you're unsure where to go next!
The video is quite helpful as it demonstrate data input for normality tests in the statistical package for the social science. I, however, find it very technical for someone new to the topic.
Remy I agree the video was helpful. I liked that he went through the process, but I'm more hands on and it would probably stick better once I am walked through the process.
Yes, this information is very technical, but Dr. Grande's detailed explanation makes it easier to understand. I believe to grasp the information totally, I will have to view the videos multiple times.
The normality tests seem to be an important part of predicting how useful the research/test is to the subject matter. If the results are found to be out of normal parameters then it is not likely that the independent variable in question would be effective.
The graph helped me understand clearer the meaning of normal distribution. The levels seemed balanced. The data program to used to obtain results seem a bit complicated. A little more help learning the program would be helpful.
Thank you for your great demonstration, dear Dr. Grande, It would greatly facilitate our learning process--and I would appreciate immensely--if you could share some sample files of both EXCEL and SPSS.
I found the video to be quite confusing as I am not familiar with SPSS. However, the information provided was beneficial, offering insight and exposure to the system and ways of reviewing data. As the course progresses, I wish to gain more knowledge on operating such software and better understanding of the KS Test and Shapiro-Wilk Test.
I too was confused about SPSS and whether it warrants this specific proceeder for data analysis or if it based on another factor. I also did not realize how complex Excel is and how it can be used for very precise and detailed work outside of my skill level of common clerical usage. I clearly need more exposure to SPSS and data research.
I better understood how to test for normality utilizing the Histogram than the Kolmogorov-Smirnov and the Shapiro-Wilk test. I need more clarity about the two and I will search for more information.
I know it was briefly mentioned about how the Shapiro-Wilk test was accepted as more valid than the KS test, but I wonder if it is important to know why these tests differ and why one is better than the other.
Thankyou Dr. for your clear explanation. However, i was wondering, since the post test scores are not normally distributed, can we still opt for parametric analysis test?
While viewing the video I learned that although the normality tests may test the same thing, they analyze data in different ways.however they come to the same conclusion for the null hypothesis.
What if I want to analyze gender (male and female) differences across two years and the normality tests exceeded 0.05 (Shapiro-Wilk) except for one? Should I go for a parametric or a non-parametric test? Thanks
Hello Dr. Grande, thanks for all your wonderful explanations about various tests in SPSS. I would like to know if there are several variables in my study and most of them are not normally distributed, while some of them are, can I proceed with Generalized linear model for all the variables? And if not, why should I not use non-parametric test for a normally distributed data? Please reply.
what if i have 5 points likert's scale data, how can i test my likert's scale data for regression assumptions (linear regression with moderation, i have one IV one DV and one moderator)
This is my second video on SPSS and while challenging, with each one I gain a bit more clarity. Once I am able to do this first hand I know things will click.
Hi Todd! Your video helped me analyse the normality for my data. I have a question though. My pre treatment scores are normally distributed and post treatment scores are not normally distributed. To give you the details, sample size 50, i'm testing 3 variables pre and post treatment and want to see if the scores are significantly different after therapy. What test should i use in this case, Mann-Whitney U test?
Hi Dr Grande, thnks for your video! I was a bit surprised that you did not make a seperate testing of normality for the intervention and control groupo (post test). Can you explain why please! Thanks so much in advance!
Hey Todd, I run an analyses and i have some huge problems 1. From my bar chat, my data is normally distributed 2. From my KS and SW analyses, the distribution is not normal
Dr Grande i have a group of 30 participants who performed the experiment into 3 conditions. My dilemma is that Shapiro wilk showed that two of the groups' data is normally distributed and the other is not normally distributed. So I am split about which tests shall I perform: shall I perform the One way ANOVA or shall I use the Kruskal Wallis Test?
I'm a little confused as to know when to use and how to trust these tests. If the K-S test is more accurate, why would you go with the Shapiro-Wilk results when they are abnormal and K-S results are normal? When is it appropriate to only use one of the tests? I understand that they measure differently, but why is that?
I agree, and it also begs the question as to whether it is useful to use both tests in the first place if you would be more likely to trust/utilize the Shapiro Wilk test?
@@chelseareeve36 As we discussed during a phd class, Shapiro Wilk tend to perform better for smaller data sets. If you have a bigger data set there would be no reason to use it.
Dear dr, I have 6 dependent variables (i.e. glomerular filtration rate), and by doing normality tests, the results show that only one of them is normally distributed. For two variables I got conflicting results from KS and SW normality tests. Which one is more valid? Also, I checked their normality for each level of independent variable (3 levels) in order to conclude which test (ANOVA or Kruskal Wallis) to use for comparing data between groups. Namely, for variables that were not normally distributed in the preliminary analysis, I obtained p-values greater than 0.05 for 2 of 3 levels of independent variable. How to interpret these results and choose a valid test?
When taking into consideration normality, how reliable would you consider a quick inspection on the histogram? Is this just considered more of a visual reference to validate the sig. data?
if the pre-test is normally distributed and the post-test is not. how to determine the statistical tool to use in determining the relationship between the two tests. please enlighten me thanks in advance
It is very interesting. I have a question, If one variable is not normally distributed and the other one yes, I should use parametric or non parametric test to compare “means/medians” between both groups (pre/post)?
I was unfamiliar with both the Kolmogorov-Smirnov and the Shapiro-Wilk test before watching this video. It is clear that the Shapiro-Wilk test is more popular and widely accepted as you say in the video. Why is this?
Having used SPSS in my undergrad, I did not expect there to be so many aspects that we didn't go over during our course. I'm glad these videos are offering a refresher and a new challenge.
sorry to be offtopic but does anybody know of a method to get back into an Instagram account??
I stupidly lost the account password. I would appreciate any tips you can offer me.
I always like to give credit where it is due, and this supported me on my fourth chapter dissertation, thank you
OMG! So happy to find you teaching advanced stats. I am getting my doctorate and taking stats. I watch your psych videos!!! Thank you for creating this content to help fill in the gaps that my stats book doesn’t address!!!
Since I don't have first hand use with the SPSS and have only learned of it by name and never in detail this video was helpful in laying out where to find information on the spread sheet. I am not ashamed to say that many of the videos have been or will be viewed many times. Overall it did help me understand some of the terms used.
Danielle Duboski I also have never used SPSS, and I have never even heard of it before. I am glad that this portion of the class is in video form so we continue to go over it until we feel comfortable with the information. You will not be alone in viewing certain videos multiple times!
I have never used SPSS and to be honest I never heard of it until Dr. Grande mentioned it in class. However, watching and listening to Dr. Grande's step by step approach for normality made it appear easy to use. Testing for normality appears pretty straight forward, so I do not feel lost or like I do not grasp the concept.
Danielle Maldonado Danielle, I have never used SPSS either. Watching the video and seeing the steps does make it appear easy. I am sure it will take more time to fully grasp SPSS and I will need to watch this video again.
I appreciate how well you break all the steps down. It's slowly coming together for me.
Normality tests can be measured in SPSS to determine whether they are normal or not. This particular example used 90 participants. From this one has to determine whether the pretest and posttest scores normally distributed. There were two different types of tests that were used Shaprio-Wilk test and Kolmogorov-Smirnov test. These were used to determine the validity. This was a bit confusing but I understand the general idea.
Toniette Morda I found it somewhat confusing as well, but got the basic concept. I think further practice would help! But overall, certainly a useful program in determining normality.
This video helped me a lot in better understanding some basics in my Statistics class in my doctorate program. Great job!
Before this class I have never heard of the program SPSS. When I researched what the program did I was pleasantly surprised at what it was created to do.After watching Dr. Grande's walk-through of how to calculate if the distribution is normal in a study I feel more confident about using SPSS in the future.
The video was easy to follow and Dr. Grande makes this seem so simple. This is all new to me but seeing the Normality test in SPSS gives me a better understanding. I will need more information on some of the concepts, Kolmogorov-Smirnov and Shapiro-Wilk tests, discussed.
Great video. Before doing any sort of analysis, it is important to be very familiar with the data set so that you understand what you hope to achieve and what the most appropriate process is to determine the relationship between the results that were attained and how the data is interpreted and then analyzed.
I agree. For my research I have been watching a lot of these videos to figure out the best analysis I should be using.
I've never used SPSS before, so this video is great. It is brief and a good introduction to what SPSS looks like and how some of the functions work.
Dr. Grande- As I am familiar with SPSS- this video refreshed my memory about how to organize the plots. Interesting, SPSS is very straight forward and is error controlled, if your information is put in right. Thanks so much for the refresher!
Thank you for the video Dr. Grande. SPSS is extremely intimidating when trying to navigate all the tables and graphs created, and understanding what it all means. It was helpful to have a break down of what the numbers mean and what the graphs are showing within this video.
Why is stats in class so absurdly inaccessible, and why can all my profs not teach like you? Thank you, sir, for helping me out.
This video and the graph helped me understand when to reject and accept the null hypothesis to test if the sample was normally distributed or not.
This video yielded many new concepts that I was unfamiliar with. However, the null and rejecting the null hypothesis is important in determining statistical significance. The SPSS system seemed to be user friendly and program features are easy to find. Very inflightfull video.
***** I used SPSS a lot in undergrad and yes it is very user friendly once you learn where all the buttons are! It will become a great tool for you to use for research.
***** It is definitely good that I can now grasp what kind of software SPSS is! I had heard references to it previously, but it didn't mean anything to me so it was nice to see how it operates.
***** I liked how Dr. Grande showed us SPSS because it did seem to be user friendly. When using SPSS in the past I did not think it was user friendly at all, but that is probablyy because I did not know what I was doing. After watching this video I believe I might be able to work with SPSS a little better.
This video was very helpful in breaking down the steps to determine how to tell if there is a normal distribution . I am not that insightful when it comes to statistics, but the video definitely explained the process in a clear and concise way.
+Nakesha Tucker I agree! The video clearly went through each step which is extremely helpful when trying to actually do this. I think once we understand these tests a bit more, this video will be even more helpful. I do feel confidant that if I were asked to find out if there is a normal distribution I would be able to do just that by following these steps.
It's been quite a while since I have used SPSS and this was a great video explaining what all the output that SPSS gives you represents. I thought the explanation of what output tells you if it is statistically significant was great. I think that showing that one test of normality is more valid than the other was important and many would not now that. I myself had forgotten that.
Mandy Moore Agreed! I said pretty much the same thing. SPSS looked a lot different when I last used it. I had forgotten most of this.
+Mandy Moore Hey I loved you song Candy!
Having the step by step instructions is important for me to be able to utilize SPSS effectively, but this video also teaches about how to apply normality tests. I do think I would understand applying the results better if I was given an example of what the data was and what the actual null hypothesis was, but as far as reading the results and the graphs, this video was helpful in teaching me normality tests in SPSS.
It has been a long time since I have used SPSS but this video was a brief and helpful reminder. I think I will need further practice with this program, but it seems to remain very useful in determining normality and understanding significance.
I have never used SPSS. However the system seemed easy to navigate and merge with research statistics. I agree, an in depth tutorial would prove beneficial.
***** I'm with you both! I need an SPSS for Dummies type of intro.
I have worked wit SPSS a lot in the past and I still never really understood it. I liked how this video broke down the different parts and really explained what was going on in SPSS at each part.
Dear Sir,
I liked you explanation. I have a small question.
1) How to test normality when there are many independent variables ?
2) How to test normality in case of several dummy variables ?
Box and whisker, Kolmogorov-Smirnov and Shapiro-Wilk tests are appropriate
this is the first time i actually witnessed how this is done. it is a very detailed software
Gentleman and a scholar, saved me a lot of pain on my diss 💪❤️
I am not yet familiar with SPSS but I do appreciate some exposure to the information. Hopefully, as the course progresses I will understand this better. It is helpful to know that software can help organize the information and interpret the data, I will take away that the Shapiro-Wilks is considered more valid.
SPSS is so much better than excel when it comes to this kind of application. It is much more user friendly and clear, in my opinion. With that being said, I would have liked a refresher on just the basics in this video. Like, even what "normality" even is. I think our first class should have presented these basic terms so that we could follow these videos easier. Research- and math in general- do not come easy to everyone. Nor has everyone taken research class. I took my research class four years ago and I am having trouble remembering what I learned. I liked the step-by-step rundown of how to do this in SPSS. It is very clear and easy to follow. However, I can't remember what skewness and kurtosis are, so I'll need to look those up and maybe watch this video again.
Jessie Howard I definitely agree here!! I would love a run down of the basics again because I feel that I am falling just short of understanding and if I could only review those basic concepts again that I would be able to understand these more advanced concepts so much better.
Dr. Grande, you are a Grandissimo. Thanks a lot.
I am not very comfortable nor confident with this of statistics and distributions. This video helped me to gain more insight into the subject. Although still very skeptical, I think using videos, such as this one, will help me to understand this subject matter a lot better.
Thank you so much! Your videos really help me out with my master’s thesis!
Infomative viedo that gave further insight into distribution and null hypothesis. The viedo also gave step by step instructions in using the excel spreadsheet.
Regina Ames I agree that this video was informative, I am not exactly excel savvy so being able to see step by step instructions on how to use the spreadsheet was a refresher and opened my eyes to how simple it can be to utilize.
Great little reminder on rejecting or accepting the null hypothesis based on the alpha level. I do not recall learning about the Shapiro-Wilk value, so watching this prompted me to dig further online to learn about it. I wish the scope of this course was longer or larger because I would have liked to use SPSS again to do statistics. I feel like one can learn more about statistics if they are actually carrying out the equations and running the tests rather than just watching them or reading about them.
Jessica Muzzin I so enjoyed using SPSS (excel is not as user-friendly in my opinion) and would be nice to go back and learn it again.I can understand why not considering how expensive the software is, though. Due to that, unless you're frequently running statistics, you don't get to us SPSS often which is all the more reason to need to learn on it again. There are a lot of tests, a lot of values, and a lot of names to remember so, you're right, it is a lot easier understanding statistics by learning it on software like this.
I remember when I used SPSS in the past, plugging in the correct numbers and keeping everything consistent, was difficult for me, because numbers and math isn't always easy for me. I'll really need to watch this again to become more familiar and comfortable with this program.
Thanks a lot Dr. Todd. The lecture is very useful. Keep it up.
Late night, working on data that is a mess... thanks for making this simple and clear.
I found this video very helpful and it was easy to follow. Once the formulas are built, inside of excel it seems to be a simple process to get the information to compute. My understanding of all of the computed information is still a fuzzy but I do have a better understanding of the normality tests in SPSS.
Bethany Elstrom It does seem like it would be simple to get the normality figured out if the formulas are on point.
SPSS seems like it is a cool program and it is really interesting to see the difference between it and Excel. The names of the tests are interesting and I really liked learning how to approach them. This video was very helpful and was a good introduction to SPSS.
It was nice to see the steps and how to apply it in Excel and complete the analysis. But I had a hard time focusing on the video since it was very mathematical, as my peers previously explained. I am unfamiliar with SPSS and have never used this before. Very useful in determining normality and understanding significance.
Thanks Dr. Todd, very clear and helpfull. Greeting from Thailand.
Great teaching. Thanks a million Dr.Grande.
Dr. Grande, this was great! Thank you!
This is another video where I feel a bit in the dark. I like how you connect the KS and SW test to the histogram and how the graphs will look as they should regarding being normally distributed as per their results. I found it useful that you explained that the point of this is that researchers want to know if a distribution is normal, and what a typical data setup in SPSS would look like.
This video was very insightful being that I have never used SPSS. It seems easy enough but I have to actually use it to get more familiar with it. I believe I have a better understanding of statically significance as well as normality. The system seems to be user friendly and structured for data entry.
Thank you Dr Grande, your videos inspired my channel
Great Video with simple explanation. Clearly articulated the KS Test & Shapiro Test :). Thanks Prof
Watching the various videos on normality testing helps to understand which tests are most relevant for what data. SPSS is becoming less scary with each video I watch.
Thank you so much for such an easy and brilliant interpretation.
thanks sir for this amazing information we want more short videos about spss data
Interesting information. Wasn't aware of the two tests that test for normality, definitely something to remember.
Wow! Thank you! That really crystallized several areas i was having trouble grasping. Much appreciated.
I appreciated the brevity of this video as well :D Not knowing what SPSS is, it seems like a good tool for statistical things. Testing to see if a distribution is normal would be really helpful, so that's good. I really liked how much data SPSS gives out. This video helped me solidify some of the terms and their uses. Not to mention the statistically significant stuff. You threw me off when you said that the pretest was not statistically significant, but once you reminded us that the Alpha value was .05 it all came together. I'm getting there with understanding this stuff.
Jeff Pincin I'm starting to get it too, Jeff! Videos like this are really helpful because of the visual aspect. Getting to see what the distribution of the pre- and post- tests made it easier to grasp, in my opinion.
Jeff Pincin I have never used SPSS either but this video was very informative. The visuals really help bring these concepts all together. I'm not totally clear on everything research related but I am starting to get a better understanding.
Having no experience with SPSS, I am a little confused but it looks to be fairly user friendly and easy to navigate once you comprehend it's purpose and how to utilize it. It does seem a little less intimidating than Excel. It's also helpful to get a first glance at what "normally distributed" looks like in the histogram. Also, I've noted that Shapiro-Wilk is widely accepted as more valid so I will keep that in mind for the future!
Kimberly Hanna I'm with you, Kim! I liked how much data SPSS shows and how it shows the graphs and all those numbers. That will probably be important stuff as we continue forward. I wonder how much we'll actually use SPSS? Or how we could even access it?
I liked this video because I was unfamiliar with SPSS and I love how user friendly and simple it seems to be while configuring data sets for research studies. I would say however, that on the mathematical side of these concepts, I am still unsure and do not firmly understand the context. I feel like I have the basics from previous courses but because it has been a few years I need to put it back into context to truly understand.
Melissa Clendaniel I share both your love and concerns over SPSS. It seems like the program is very simple to navigate and use, but I also have concerns over understanding the information being inputted. Even the best program is useless unless we understand the results. I hope during this course I learn what the information means.
Hi, thanks you for the video :) If you have a data set resembling the one in the example were the pre test is normally distributed, but the post test is not, what statistical test should we apply?
Did you receive a reply?
This was very helpful, especially in light of our last assignment.
This video is informative but it is clear that one would need more background on SPSS and when to use these specific tests. I was familiar with some of the jargon related to normal distribution and alpha learned through my previous statistics course. In order to effectively use this approach data analysis, I would need to become knowledgeable about the tests and how to sufficiently use the program to manipulate the data.
I agree Kristine. I wish I was privy to Dr. Grande's channel during my undergraduate studies. The video series using the SPSS would have been very helpful during my statistic courses. I too was familiar with some of the concepts conveyed in this video but statistics overall is a weak area of mine.
This video was a little confusing to me only because it came off as very mathematical which surely is not my strong suit.I was unfamiliar with what SPSS is as well as the purpose for it. This video was successful in providing step by step directions on how to move through the excel spreadsheet in order to find the data needed, which was not only informative but simple enough to follow. The differences and changes between the pretest and post test can be due to the way the tests analyze data differently, and that Shapiro-Wilk test was more valid.
Candace Fernandez Agreed! However, I believe this type of scoring can be very helpful when conducting research and searching for normality.
Candace Fernandez I agree the viedo was very mathematical and either math nor statistics are strong suits of mine.
Candace Fernandez I agree! Mathematics has always been difficult for me, and as I mentioned in my comment, I'll need to rewatch this to feel comfortable with SPSS. Although I am happy that there are videos for us to watch to become more familiar with this program.
Candace Fernandez I agree. I wrote down notes on this video and I didn't get it until it was explained in class. Not in the least a math person either!! LOL
This was so easy to follow and understand. I love SPSS as it is so easy to use and understand. I would have liked a reminder of what Kurtosis is and the meaning of the values for skewness more in depth. That having been said, the explanation of how to read the normality tests and what values to look for (that are statistically significant) was well-explained and it was good to go back over the histograms as that helps add to the last video with normal distribution. This was a good video for sharpening up skills in SPSS, particularly for people like me who have not had access to the program for a long time to practice with it.
Alicia Zahn I need a refresher on kurtosis! I forgot about that term until you mentioned it. I agree that this was a hugely helpful video to brush up on the use of SPSS. I really wish we all had access to that program as a part of this graduate program; I think using SPSS is something everyone should be familiar with because I also consider it to be much more user friendly than Excel. It is interesting and informative and provides those who are familiar with it an advantage in understanding the reporting on psychological and counseling research. Maybe it should be considered to be included in the curriculum for future cohorts.
Alicia Zahn This video was to very easy to follow. I don't have a good grasp on the reading of the normality test, but I think if we go over it in class I will be able to follow along. There was a great deal of output which is a plus.
I am struggling with research methods and theory at uni errrgh stats is another language!!!!!!!!!!! i need to maintain a distinction average, and you are helping me do that! thank you
Thanks Dr. Grande.,That was very useful
I have never used SPSS, so I am feeling a little overwhelmed learning a new "system" in excel. However, I like that excel does the mathematical part once I plug in the correct information, which leaves me with the job of being able to decipher what the outcomes mean. I think with time, I will be able to understand this as I learn all of the terms and what they mean.
Rachel Foster SPSS is not part of Excel- it is it's own - very expensive- program. Excuse me if I am misinterpreting your comment.
I find it a lot easier to use because it is made for this kind of use. I agree that it is great that these programs do the calculations for you. I just wish I knew what they all mean!
Rachel Foster I agree with you. I too, like how you can just plug numbers into Excel and it does the rest for you. However, SPSS seems to be just as user friendly.
Danielle Maldonado I agree with SPSS being as user friendly. I like how each function has the appropriate headlines to guide you should you forget or if you're unsure where to go next!
Thak you Dr. Grande! You are in did Grande in your field...
You're welcome!
The video is quite helpful as it demonstrate data input for normality tests in the statistical package for the social science. I, however, find it very technical for someone new to the topic.
Remy I agree the video was helpful. I liked that he went through the process, but I'm more hands on and it would probably stick better once I am walked through the process.
Yes, this information is very technical, but Dr. Grande's detailed explanation makes it easier to understand. I believe to grasp the information totally, I will have to view the videos multiple times.
The normality tests seem to be an important part of predicting how useful the research/test is to the subject matter. If the results are found to be out of normal parameters then it is not likely that the independent variable in question would be effective.
The graph helped me understand clearer the meaning of normal distribution. The levels seemed balanced. The data program to used to obtain results seem a bit complicated. A little more help learning the program would be helpful.
Thank you for your great demonstration, dear Dr. Grande,
It would greatly facilitate our learning process--and I would appreciate immensely--if you could share some sample files of both EXCEL and SPSS.
deValmont Guy same question
I am beginning to appreciate SPSS!
Thank you for the simple explanation :)
This video really helped me understand the steps. Thanks.
I found the video to be quite confusing as I am not familiar with SPSS. However, the information provided was beneficial, offering insight and exposure to the system and ways of reviewing data. As the course progresses, I wish to gain more knowledge on operating such software and better understanding of the KS Test and Shapiro-Wilk Test.
I too was confused about SPSS and whether it warrants this specific proceeder for data analysis or if it based on another factor. I also did not realize how complex Excel is and how it can be used for very precise and detailed work outside of my skill level of common clerical usage. I clearly need more exposure to SPSS and data research.
It was a great enlightenment, thank you more of this type of video.
thank you for your clear explanation!
Life saver> Thank you doctor
Hi Dr Todd, Can you please explain to me where the value W comes from when using the Shapiro-Wilk? thank you
Very helpful Dr. Grande. Thank you!
thanks, this was very helpful and easy
Thank you so much Sir Grande 💕
Since the pretest was normally distributed and the post test was not, do we need to apply parametric test?
I better understood how to test for normality utilizing the Histogram than the Kolmogorov-Smirnov and the Shapiro-Wilk test. I need more clarity about the two and I will search for more information.
I know it was briefly mentioned about how the Shapiro-Wilk test was accepted as more valid than the KS test, but I wonder if it is important to know why these tests differ and why one is better than the other.
Thankyou Dr. for your clear explanation. However, i was wondering, since the post test scores are not normally distributed, can we still opt for parametric analysis test?
Thanks so much!!!! GREAT information!!!
Thank you, this was very helpful
While viewing the video I learned that although the normality tests may test the same thing, they analyze data in different ways.however they come to the same conclusion for the null hypothesis.
I agree. Although the data of each test was different they both resulted in the same null hypothesis.
What if I want to analyze gender (male and female) differences across two years and the normality tests exceeded 0.05 (Shapiro-Wilk) except for one? Should I go for a parametric or a non-parametric test? Thanks
and shall I consider my sample as paired or independant since we usually refer to gender as independant whilst yearly differences as paired?
Thank you so much but if once the data is not normally distributed then how can we manage it?
Hello Dr. Grande, thanks for all your wonderful explanations about various tests in SPSS. I would like to know if there are several variables in my study and most of them are not normally distributed, while some of them are, can I proceed with Generalized linear model for all the variables? And if not, why should I not use non-parametric test for a normally distributed data? Please reply.
what if i have 5 points likert's scale data, how can i test my likert's scale data for regression assumptions (linear regression with moderation, i have one IV one DV and one moderator)
you should calculate total or mean score then you can look KS test
In such case, when Pretest is normally distributed while the posttest is not normally distributed, we have to use parametric or non-parametric tests?
This is my second video on SPSS and while challenging, with each one I gain a bit more clarity. Once I am able to do this first hand I know things will click.
Hi Todd!
Your video helped me analyse the normality for my data. I have a question though. My pre treatment scores are normally distributed and post treatment scores are not normally distributed. To give you the details, sample size 50, i'm testing 3 variables pre and post treatment and want to see if the scores are significantly different after therapy. What test should i use in this case, Mann-Whitney U test?
Hi Dr Grande, thnks for your video! I was a bit surprised that you did not make a seperate testing of normality for the intervention and control groupo (post test). Can you explain why please! Thanks so much in advance!
Hi! Thanks for the video! Would testing for multivariate normality use the same process? Thank you!
Hey Todd, I run an analyses and i have some huge problems
1. From my bar chat, my data is normally distributed
2. From my KS and SW analyses, the distribution is not normal
Dr Grande i have a group of 30 participants who performed the experiment into 3 conditions. My dilemma is that Shapiro wilk showed that two of the groups' data is normally distributed and the other is not normally distributed. So I am split about which tests shall I perform: shall I perform the One way ANOVA or shall I use the Kruskal Wallis Test?
I'm a little confused as to know when to use and how to trust these tests. If the K-S test is more accurate, why would you go with the Shapiro-Wilk results when they are abnormal and K-S results are normal? When is it appropriate to only use one of the tests? I understand that they measure differently, but why is that?
I agree, and it also begs the question as to whether it is useful to use both tests in the first place if you would be more likely to trust/utilize the Shapiro Wilk test?
@@chelseareeve36 As we discussed during a phd class, Shapiro Wilk tend to perform better for smaller data sets. If you have a bigger data set there would be no reason to use it.
Dear dr, I have 6 dependent variables (i.e. glomerular filtration rate), and by doing normality tests, the results show that only one of them is normally distributed. For two variables I got conflicting results from KS and SW normality tests. Which one is more valid?
Also, I checked their normality for each level of independent variable (3 levels) in order to conclude which test (ANOVA or Kruskal Wallis) to use for comparing data between groups.
Namely, for variables that were not normally distributed in the preliminary analysis, I obtained p-values greater than 0.05 for 2 of 3 levels of independent variable. How to interpret these results and choose a valid test?
hello, on this case what im going to use since the pre-test is normally distributed while the post is not, is parametric or non-parametric?
When taking into consideration normality, how reliable would you consider a quick inspection on the histogram? Is this just considered more of a visual reference to validate the sig. data?
if the pre-test is normally distributed and the post-test is not. how to determine the statistical tool to use in determining the relationship between the two tests. please enlighten me thanks in advance
It is very interesting.
I have a question, If one variable is not normally distributed and the other one yes, I should use parametric or non parametric test to compare “means/medians” between both groups (pre/post)?
I was unfamiliar with both the Kolmogorov-Smirnov and the Shapiro-Wilk test before watching this video. It is clear that the Shapiro-Wilk test is more popular and widely accepted as you say in the video. Why is this?