Once again I found the presentation to be very useful, providing a step-by-step demonstration on how to successfully calculate and interpret the Cronbach’s Alpha. As someone who has little knowledge and understanding of such concepts, I appreciated the simple description, noting that the Cronbach's alpha us a common tool to determine the reliability when working with Likert Scales, and that it doesn’t work to determine the reliability for only one item there must be a series of items. I will definitely be referring back to this video in the future. Thank You.
Yet again, I agree! I think it was valuable for Dr. Grande to demonstrate how to increase reliability based upon the data set and desirable Cronbach's alpha.
This is definitely my favorite statistic. I liked his explanation of Cronbach's Alpha and what it does. I liked, too, how he explained if there were deleted items, what we should do with them, and how we should determine if items should be deleted. This was really helpful.
I am completely unfamiliar with Cronbach's Alpha, but this video clearly explained it as a test of reliability of a scale, and is popularly used when working with Likert scales. I also learned that Cronbach's Alpha does not work in determining reliability for one item, but rather for a series of items. Overall, very informative and clearly explained material.
Dr. Grande- This video was easy to understand but also confusing for me. This concept allowed me to understand more about Cronbach's Alpha. I am not familiar with this method but you were able to explain this method in detail, which was very helpful. Thank you!
Like many others, I did not know that Cronbach's alpha existed prior to this video and can definitely see it's usefulness as a statistic being that Likert scales are quite common. Thank you for posting this.
Straight to the point and easy to understand. Knowing that the item 7 is a good Alpha, whereas 8 or 9 Cronbach's Alpha would give us a lower reliability.
Candace Fernandez You think? I questioned that. I guess it is because I want to know "Why" something is, and not just how to get there. I think I need to abandon that when it comes to statistics because then I'l never accept anything into my brain.
I found this video to be very interesting. I liked the explanation of Cronbach's Alpha and what it does. I thought that it was really helpful. I also liked how Dr. Grande explained the Cronbach's Alpha if items deleated and how we can use that to determine if items potentially should be deleted.
I was very nervous about this video because I have never even heard of Cronbach's Alpha, but it was very interesting to learn about. I do not think that I 100% understood everything in this video, but with a bit of Googling I feel more confident towards this subject.
I have never heard of Cronbach’s Alpha before but this video provided a very good explanation. I feel confident about this concept after watching the video. I also think this video was helpful since so many people use Likert scales.
This was the first time I have heard of Cronbach's Alpha. It was very interesting to see that SPSS can show you what items could be removed to make it more reliable.
Danielle Duboski I found the removal of the items interesting, too, but confusing since I don't understand why someone would other than to improve the score.
Danielle Duboski This was the first time that I heard of Cronbach's Alpha, but I think this is definitely something worth looking into. I think that if I ever have the opportunity to use SPSS this would be something to try.
Brilliant video! I am currently doing my final year at uni, and i am using pre-existing psychometric scales and I will check the validity of these scales against the literature.
I remember using SPSS back in the day of Windows 3.1 and dot matrix printers... I'm not actually THAT old, my school was just pretty out of date in the 90s. 😂 Research design and methods was always my favorite class though. 💙
It is helpful that the test shows the level for Cronbach's Alpha to meet. I am a bit confused as to how you can just take out certain data sets. I did not do much work with Cronbach's alpha in the past so I am somewhat lost.
Thank you for sharing this video Dr. Grande. I appreciate the explanation of what the cronbach's alpha is used for. It is also interesting to see you can remove an outlier to see how the data can shift.
This video was a little easier to understand. It confirms what the book said about SPSS having more features and capabilities than Excel. This system seems like it can do more with statistics over Excel. It was interesting to see.
Good to know that Cronbach's Alpha is a popular method to determine reliability when working with Likert scales. I also learned how to interpret the data to determine which items can/should be deleted to increase the reliability of an instrument (trying to get the alpha above 0.7).
I would like to have an explanation of how the mathematical formula ties to the concept. Also, if I have 5 items, and 100 subjects, for example, does the formula involve the number of items or the number of subjects, or both? Is there a formula that looks at relationship of covariance to variance? Is covariance the same as inter-item correlation? What does it mean to have item-total score correlation mean...in terms of variance and co-variance. As you can see, I want to understand chronbach's alpha in terms of covariance and variance, and link this to concepts such as item-total score correlation. But I need to understand the fine distinctions. All help is most appreciated... thanks..jes
It was helpful to learn that a Conbach's Alpha only works with scales, subscales, or series of items to determine the Conbach's Alpha. And even though the level of measurement were nominal, the scale was ordinal (1-10).
Really liked the explanation, I think this was a good video. I remember using SPSS in undergrad and this was interesting to see again, I understand it a lot more.
Cronbach's Alpha is pretty interesting. I would have never imagined that there was such a simple way to determine which items to use and not to use on a scale. My question is what, in particular, is it about the items that were deleted make the test more reliable once the items are deleted? I was wondering if it was due to the responses or statistics or something else entirely.
This seems to be a little bit different, although I have heard of scaling before, I have never heard of Cronbach's Alpha. I liked that the data set was only 50, it was helpful in trying to imagine this in practice.
Why i did for 34 items & it warns on determinant of covariance matrix is zero/approx zero. (Cont.) Statistics based on its inverse matrix cannot be computed & they are displayed as system missing values
Thanks for the video. Quick question: Is it only likert scale-type (ordinal) measurements that can be used to run Cronbach's alpha? How can one test reliability of instruments with nominal (e.g. yes/no) variables?
I like that the video begins with an explanation of what Cronbach's alpha actually is. I would like another example of when to use it right off the bat though, so I can wrap my head around how to use it before I learn how to use it. I like this video because I am using a Likert scale model in my research proposal, so I kind of understand this in terms of the Quality of Life index. I don't understand why you would delete data, though. What does "good" and "questionable" measures mean? Is that reliability? I think that's what I gathered from this.
This is a vey useful vedio Dr. Grande. I have a question regarding assessing the psychometric property of a scale. I used a published scale for job satisfaction including 4 options ( satisfied, very satisfied, dis satisfied and very dissatisfied ) after piloting my survey, participants suggested to add option nuteral , how I can assess the psychometric propority of the new scale? is adding that option change it?
Thank you so much for your thorough and clear explanation. It is so helpful especially for me being new in research. I just wrote up analysis for my paper after watching your video. Do you have any TH-cam video or web page that is about writing up analysis?
Thank you so much. it was very helpful but please must all the respondents be included during the calculation of the reliability or some % of the sample? especially when the sample is large, say 300. please help. if some percentage of the sample, what percentage please?
Thank you for this video! I do have a question, I don't understand why when I remove the suggested item the new cronbach's alpha does not match the "better" one shown before. like before the row "if item is deleted I 0,701" I removed the item run the analysis again but now the alpha is lower is 0,690. What I can do about it?
This video is very informative. However, I did a reliability test cronbach's alpha on my pilot data but two variables came up with a negative value and at 0.00 respectively. All other variables in the instrument were reliable. I tried reverse coding the items to solve the problem but it seems not to work out. Please I need help. Thanks
excellent presentation. I have a question, testing internal consistency reliability within the items or questions of an assessment tool by one respondent, makes sense to me. What is the interpretation of the coefficient Alpha for items or questions among multiple respondents? (taking into account that different respondents may have different experiences about the same construct)
Hi Dr., I have a really tough question bothering me a lot. So, regarding the second point at the very end of the video, what should we do if this whole questionnaire (say these 8 items of scale measurements) is to measure the self-efficacy level, and you ve got another sheet of questionnaire to measure employee engagement, and finally, you want to get another sheet of data (one column of the self-efficacy level), and another sheet of data (one column of their engagement level), in order to analyse if they are correlated or not. Then HOW TO GAIN THAT DATA FROM EACH QUESTIONNAIRE? Or it is not the way to do the correlation? Bit urgent, could you please try to reply to me as soon as you could? Many many thanks, :)
Thank you Dr. Todd Grande. I always look up at your videos to learn about SPSS because it is easy to follow and understand. Forgive me for asking, if my questionnaire has 3 sections and each section has 10 questions, do I run the 10 questions only or the whole 30 questions to check its reliability? I would really appreciate your response.
Thank you so much Dr. Todd. I am fairly new to statistic analysis and I was wondering if you have or recommend any videos from the beginning of receiving survey results, how to enter them in spreadsheet, how to upload them into SPSS and analyze the data. I want to have a solid background by having a strong foundation from the beginning. I would really appreciate any help. Thanks 🙏
So you just get rid of the items (10 and 7) to gain a .7 alpha? Are they no longer important to the data? Very clear demonstrations but confused about why to delete participant items because of the effect on the reliability on the scale. Thank you for the video Dr. Grande.
Hi Dr. Todd Grande, Thanks for the video. I want to check with you that i have 12 dimensions to test for the reliability analaysis but there are over 7 dimensions with different items are very low. if the Cronbach's Alpha is very low which is below 0.4 then should i just get rid of the items and the dimensions?
If we have 8 variables in our research. Shall we measure the coefficient alpha separately for each variable or we must conduct it on all items of the questionnaire?
Hi! how to check the manipulation question? my advisor told me to use Cronbach alpha, but how to know the question is manipulated or not from the result of Cronbach alpha?
I'm glad you used the concept of likert scale. Am I correct to understand that a multi-item scale would be used as interval level variable used as either the dependent or independent variable? So I could use a parametric statistical test?
Thank you so much. It helped me a lot. I have one question that confused from this video. I understand that there are only 8 items left to distribute the samples and not 10 items. Is it right or wrong? Please help me. Thank you.
One of my questions to measure the variable was a ranking of 4 options. (from 1 to 4) These show up in my dataset as 4 separate questions. The other questions are likert scale. I set it on scale (not ordinal). Can I still use Cornbach's alpha the same way?
Hi Todd Grande, may i know how we compute alpha reliability for test/exam papers with different types of test techniques (true/false), (written test) (Yes/no) (comprehension A,B, C, D). Thank you.
Hi, do you have any resources on how to write up a results section for a lab report on a cronbach's alpha and justify a deletion of an item? Specifically for a dichotomous scale. Thank you.
Thank you it helped a lot. I didn't quite understand one thing. what type should I select scale/ordinal/numeric when I create the variables if my questionnaire has 5 point Likert scale questions
Typically, if one is working with Likert scale data, the ordinal level of measurement is specified, although some use interval if there is a reason to belief the data points are equally spaced.
Ive issue with running reliability analysis in SPSS. Whener i run reliability analysis for same measurement taken at two different inetrvals i get an error message like this Warnings Each of the following component variables has zero variance and is removed from the scale: ASM1, ASM2 Too many items are deleted from the scale. Execution of this command stops. Both are in scientific notation with three decimal places
If Item deleted in reliability analysis, does it effect other analysis? do i have to re-run compute mean, descriptive analysis, correlation pearson analysis, multiple regression analysis?
![ทางเดินชีวิต - ธีเดช ทองอภิชาติ x อ.ไข่ มาลีฮวนน่า [Official MV]](http://i.ytimg.com/vi/1f3wcG16dd4/mqdefault.jpg)
Very useful and comprehensive explanation - literally at the level of each option. Would take years, but the entire SPSS manual should be like this.
Once again I found the presentation to be very useful, providing a step-by-step demonstration on how to successfully calculate and interpret the Cronbach’s Alpha. As someone who has little knowledge and understanding of such concepts, I appreciated the simple description, noting that the Cronbach's alpha us a common tool to determine the reliability when working with Likert Scales, and that it doesn’t work to determine the reliability for only one item there must be a series of items. I will definitely be referring back to this video in the future. Thank You.
Yet again, I agree! I think it was valuable for Dr. Grande to demonstrate how to increase reliability based upon the data set and desirable Cronbach's alpha.
This keeps showing up in my TH-cam recommendations so I finally clicked it! 😏
Same 😂
This is definitely my favorite statistic. I liked his explanation of Cronbach's Alpha and what it does. I liked, too, how he explained if there were deleted items, what we should do with them, and how we should determine if items should be deleted. This was really helpful.
I am completely unfamiliar with Cronbach's Alpha, but this video clearly explained it as a test of reliability of a scale, and is popularly used when working with Likert scales. I also learned that Cronbach's Alpha does not work in determining reliability for one item, but rather for a series of items. Overall, very informative and clearly explained material.
Jacklin Skibicki I can't really tell how often one might use this analysis, but it seems very helpful.
Dr. Grande- This video was easy to understand but also confusing for me. This concept allowed me to understand more about Cronbach's Alpha. I am not familiar with this method but you were able to explain this method in detail, which was very helpful. Thank you!
Like many others, I did not know that Cronbach's alpha existed prior to this video and can definitely see it's usefulness as a statistic being that Likert scales are quite common. Thank you for posting this.
Thank you so much for your video! I would not have graduating with my masters without it!
Thank you very much. This video is very educative.
I have no idea what this is, I just love your voice 😍
Sir thank you for your precious guidance, it's a request if you can do something to increase the volume in your future videos
Straight to the point and easy to understand. Knowing that the item 7 is a good Alpha, whereas 8 or 9 Cronbach's Alpha would give us a lower reliability.
Agree with 100%. i think this video was very easy to interpret and understand.
Candace Fernandez Agreed. Certainly clear and concise instruction and explanations.
Candace Fernandez You think? I questioned that. I guess it is because I want to know "Why" something is, and not just how to get there. I think I need to abandon that when it comes to statistics because then I'l never accept anything into my brain.
Candace Fernandez Agreed. Simple instructions and explanations.
Thanks Dr. Grande, writting my masters thesis at the moment and your videos are just what I need!
I found this video to be very interesting. I liked the explanation of Cronbach's Alpha and what it does. I thought that it was really helpful. I also liked how Dr. Grande explained the Cronbach's Alpha if items deleated and how we can use that to determine if items potentially should be deleted.
Mandy Moore I agree. I was wondering the purpose of deleting items and then learned that it would be to increase the reliability of an instrument.
I was very nervous about this video because I have never even heard of Cronbach's Alpha, but it was very interesting to learn about. I do not think that I 100% understood everything in this video, but with a bit of Googling I feel more confident towards this subject.
I have never heard of Cronbach’s Alpha before but this video provided a very good explanation. I feel confident about this concept after watching the video. I also think this video was helpful since so many people use Likert scales.
Brittany Vodzak I agree that this was a good video, and also that there are many people that like Likert scales.
This was the first time I have heard of Cronbach's Alpha. It was very interesting to see that SPSS can show you what items could be removed to make it more reliable.
Danielle Duboski I found the removal of the items interesting, too, but confusing since I don't understand why someone would other than to improve the score.
Danielle Duboski This was the first time that I heard of Cronbach's Alpha, but I think this is definitely something worth looking into. I think that if I ever have the opportunity to use SPSS this would be something to try.
Brilliant video! I am currently doing my final year at uni, and i am using pre-existing psychometric scales and I will check the validity of these scales against the literature.
I remember using SPSS back in the day of Windows 3.1 and dot matrix printers... I'm not actually THAT old, my school was just pretty out of date in the 90s. 😂 Research design and methods was always my favorite class though. 💙
It is helpful that the test shows the level for Cronbach's Alpha to meet. I am a bit confused as to how you can just take out certain data sets. I did not do much work with Cronbach's alpha in the past so I am somewhat lost.
Greetings Dr.!!...you are genius its really helpful...magi from Ethiopia..thank you
Thank you Dr. Todd for your great explanation.
I didn’t know this but Cronbach’s Alpha is the expected correlation of two tests that measure the same constructs. This was interesting to see!
Toniette Morda There were several interesting points in this video that I picked up on. Overall, I enjoyed this one.
Wonderful explanation, thanks for explaining this in such easy manner.
Thank you for your video! SPSS brings me back to my grad school days!
This is the first time i heard of this test of reliability of a scale. good video.
Thank you. Very clear and helpful.
Thank you for sharing this video Dr. Grande. I appreciate the explanation of what the cronbach's alpha is used for. It is also interesting to see you can remove an outlier to see how the data can shift.
Thank you for the video, it was very helpful.
Thank you very much for your explanation! It was soooo clear!
You're welcome!
This video was a little easier to understand. It confirms what the book said about SPSS having more features and capabilities than Excel. This system seems like it can do more with statistics over Excel. It was interesting to see.
Ashlee Todd I definitely could tell that SPSS had more capabilities than Excel in this video. I thought it was interesting as well.
Ashlee Todd yes i agree.
woah i didnt know you did statistics stuff too. you must know everything in the universe.
Thank you for your lessons! It's really useful for my thesis!
Good to know that Cronbach's Alpha is a popular method to determine reliability when working with Likert scales. I also learned how to interpret the data to determine which items can/should be deleted to increase the reliability of an instrument (trying to get the alpha above 0.7).
I would like to have an explanation of how the mathematical formula ties to the concept. Also, if I have 5 items, and 100 subjects, for example, does the formula involve the number of items or the number of subjects, or both? Is there a formula that looks at relationship of covariance to variance? Is covariance the same as inter-item correlation? What does it mean to have item-total score correlation mean...in terms of variance and co-variance. As you can see, I want to understand chronbach's alpha in terms of covariance and variance, and link this to concepts such as item-total score correlation. But I need to understand the fine distinctions. All help is most appreciated... thanks..jes
This is a very useful video. Clear explanation. Thanks a lot!
You make stat so easy to digest! Thank you and best wishes
Thank you Dr. Grande, you're the best!! :)
thank you sir! so easy to understand!!
The explanations in this video were useful and constructive to better understand this. I thought this was a nice visual.
It was helpful to learn that a Conbach's Alpha only works with scales, subscales, or series of items to determine the Conbach's Alpha. And even though the level of measurement were nominal, the scale was ordinal (1-10).
Many thanks Dr. Grande for this very instructive video.
Thank you, Dr. Grande, great video, and great explanation!!
Thank so much, great. Make it easy and clear.
Really liked the explanation, I think this was a good video. I remember using SPSS in undergrad and this was interesting to see again, I understand it a lot more.
Your videos have been wonderful. At the end of your videos, would you please show how to write up the results? Keep up the wonderful tutorials.
Very nice, thank you it was helpful
Please tell something about cronbach alpha standardized value
Thank you for this video. It's very tool .
Dr Grande you are amazing
Thank you for the video Todd.. I wish you'd explain about correcting the questions and how it effects the Cr alpha
Excellent description. Thanks!
Cronbach's Alpha is pretty interesting. I would have never imagined that there was such a simple way to determine which items to use and not to use on a scale. My question is what, in particular, is it about the items that were deleted make the test more reliable once the items are deleted? I was wondering if it was due to the responses or statistics or something else entirely.
This seems to be a little bit different, although I have heard of scaling before, I have never heard of Cronbach's Alpha. I liked that the data set was only 50, it was helpful in trying to imagine this in practice.
Why i did for 34 items & it warns on determinant of covariance matrix is zero/approx zero. (Cont.) Statistics based on its inverse matrix cannot be computed & they are displayed as system missing values
Thanks for the video. Quick question: Is it only likert scale-type (ordinal) measurements that can be used to run Cronbach's alpha? How can one test reliability of instruments with nominal (e.g. yes/no) variables?
Thank you for this video, it made my work so much easier to do!
thank you for excellent explanation!
That was clear as day - even better. Thank you Dr. Todd Grande, I am rescued:)
I like that the video begins with an explanation of what Cronbach's alpha actually is. I would like another example of when to use it right off the bat though, so I can wrap my head around how to use it before I learn how to use it. I like this video because I am using a Likert scale model in my research proposal, so I kind of understand this in terms of the Quality of Life index. I don't understand why you would delete data, though. What does "good" and "questionable" measures mean? Is that reliability? I think that's what I gathered from this.
my questions are divided into 3 subscales, does it mean that I need to do this procedure three times?
Thanks Doc. This has really helped.
This is a vey useful vedio Dr. Grande. I have a question regarding assessing the psychometric property of a scale. I used a published scale for job satisfaction including 4 options ( satisfied, very satisfied, dis satisfied and very dissatisfied ) after piloting my survey, participants suggested to add option nuteral , how I can assess the psychometric propority of the new scale? is adding that option change it?
Thank you so much for your thorough and clear explanation. It is so helpful especially for me being new in research. I just wrote up analysis for my paper after watching your video. Do you have any TH-cam video or web page that is about writing up analysis?
Thank you! Would be great to see an APA report write up sample on it!
USEFUL IN TEACHING RESEARCH SUBJECT
Thank you so much. it was very helpful but please must all the respondents be included during the calculation of the reliability or some % of the sample? especially when the sample is large, say 300. please help. if some percentage of the sample, what percentage please?
Great video as always
Thank you for this video! I do have a question, I don't understand why when I remove the suggested item the new cronbach's alpha does not match the "better" one shown before. like before the row "if item is deleted I 0,701" I removed the item run the analysis again but now the alpha is lower is 0,690. What I can do about it?
This video is very informative. However, I did a reliability test cronbach's alpha on my pilot data but two variables came up with a negative value and at 0.00 respectively. All other variables in the instrument were reliable. I tried reverse coding the items to solve the problem but it seems not to work out. Please I need help. Thanks
excellent presentation. I have a question, testing internal consistency reliability within the items or questions of an assessment tool by one respondent, makes sense to me. What is the interpretation of the coefficient Alpha for items or questions among multiple respondents? (taking into account that different respondents may have different experiences about the same construct)
This is a very new concept for me. I am familiar with some of the scaling references, but this procedure was a little different.
Hi Dr., I have a really tough question bothering me a lot. So, regarding the second point at the very end of the video, what should we do if this whole questionnaire (say these 8 items of scale measurements) is to measure the self-efficacy level, and you ve got another sheet of questionnaire to measure employee engagement, and finally, you want to get another sheet of data (one column of the self-efficacy level), and another sheet of data (one column of their engagement level), in order to analyse if they are correlated or not. Then HOW TO GAIN THAT DATA FROM EACH QUESTIONNAIRE? Or it is not the way to do the correlation? Bit urgent, could you please try to reply to me as soon as you could? Many many thanks, :)
Thank you Dr. Todd Grande. I always look up at your videos to learn about SPSS because it is easy to follow and understand. Forgive me for asking, if my questionnaire has 3 sections and each section has 10 questions, do I run the 10 questions only or the whole 30 questions to check its reliability? I would really appreciate your response.
Thank you sir for this very informative video...sir can you please increase your voice, your voice is very low in your every video...
Thank you so much Dr. Todd. I am fairly new to statistic analysis and I was wondering if you have or recommend any videos from the beginning of receiving survey results, how to enter them in spreadsheet, how to upload them into SPSS and analyze the data. I want to have a solid background by having a strong foundation from the beginning. I would really appreciate any help. Thanks 🙏
Thanks Dr.Grande for your explanation .. I have cronbach alpha negative value in my data could you explain of that ???
So you just get rid of the items (10 and 7) to gain a .7 alpha? Are they no longer important to the data? Very clear demonstrations but confused about why to delete participant items because of the effect on the reliability on the scale. Thank you for the video Dr. Grande.
Dr.Grande, how would you do the C.Alpha for men and women separately if they answered the same questionnaire? Great video!
Thank you for explaining ,vey good way of explaining. I want to ask about data files, How can I download this data file.
I am not familiar with how to do this so this was very useful
I agree. I am not familiar with this model as well and the video was helpful.
Hi Dr. Todd Grande,
Thanks for the video.
I want to check with you that i have 12 dimensions to test for the reliability analaysis but there are over 7 dimensions with different items are very low.
if the Cronbach's Alpha is very low which is below 0.4 then should i just get rid of the items and the dimensions?
Why does the mean in the Statistic Scale is higher? where did it come from?
Thank you dr. todd. What is the minimum no of respondents needed for reliability testing?is there a requirement for this?thanks
If we have 8 variables in our research. Shall we measure the coefficient alpha separately for each variable or we must conduct it on all items of the questionnaire?
Please can you carry such a test on a questionnaire with yes or no answers?
Hi! how to check the manipulation question? my advisor told me to use Cronbach alpha, but how to know the question is manipulated or not from the result of Cronbach alpha?
I'm glad you used the concept of likert scale. Am I correct to understand that a multi-item scale would be used as interval level variable used as either the dependent or independent variable? So I could use a parametric statistical test?
Hi how do i get cronbach alpha, standard deviation and mean on one table for descriptive statistics of a constructs?
How to calculate the reliability of questionnaire with positive and negative sub-scale?
Thank you so much. It helped me a lot. I have one question that confused from this video. I understand that there are only 8 items left to distribute the samples and not 10 items. Is it right or wrong? Please help me. Thank you.
One of my questions to measure the variable was a ranking of 4 options. (from 1 to 4) These show up in my dataset as 4 separate questions. The other questions are likert scale. I set it on scale (not ordinal). Can I still use Cornbach's alpha the same way?
Hello How can I test the reliability of my multiple choice test on Cronbach alpha? How can I enter their responses. Thank you.
what if there is reversed items in the scale? should i include the reversed items in the analysis, or stick to the original ones?
Hi Todd Grande, may i know how we compute alpha reliability for test/exam papers
with different types of test techniques (true/false), (written test)
(Yes/no) (comprehension A,B, C, D). Thank you.
Hi, do you have any resources on how to write up a results section for a lab report on a cronbach's alpha and justify a deletion of an item? Specifically for a dichotomous scale. Thank you.
Thank you it helped a lot. I didn't quite understand one thing. what type should I select scale/ordinal/numeric when I create the variables if my questionnaire has 5 point Likert scale questions
Typically, if one is working with Likert scale data, the ordinal level of measurement is specified, although some use interval if there is a reason to belief the data points are equally spaced.
How do make the role column that shows the input sign?
Thanks 👍😌
How to find dimensions of constructs using factor analysis? is there any tutorial of yours for that topic?
Ive issue with running reliability analysis in SPSS. Whener i run reliability analysis for same measurement taken at two different inetrvals i get an error message like this
Warnings
Each of the following component variables has zero variance and is removed from the scale: ASM1, ASM2
Too many items are deleted from the scale.
Execution of this command stops.
Both are in scientific notation with three decimal places
If Item deleted in reliability analysis, does it effect other analysis?
do i have to re-run compute mean, descriptive analysis, correlation pearson analysis, multiple regression analysis?