Funny that the example was sleep deprivation, because I fell asleep during the lectures on main effects and interactions and missed learning this. Thank you so much for helping me out!
After reading text books , reading so many articles and research paper and seeing many youtube videos I thought of giving up the topic but at last I found your video and it made the concept all clear. Thanks a lot from India for uploading such nice video on this complex topic.
My lecturer would not stop going on tangents and then pausing only to attempt three more times to explain what these effects are. My test is tomorrow, you are a life saver. Thank you!
After a day of trying to figure this out in my textbook, I finally looked it up on TH-cam. You just resolved a days worth of stress. Fuck the textbook. I’m using TH-cam from now on.
Hi Jim, thank you for your simplified version of understanding fANOVA! Choosing the right statistical test gets quite difficult with many groups, and multi-dimensional output variables, this helped a lot!
Excellent video. Searching on TH-cam for the last hour or so for a clear explanation on the meaning of main effects and interaction and this video was the best by far.
the vid my professor attached to teach us this cuz it's an online class is 2 hours long. You just summed up 2 hours, held my attention, and made it make sense. omg THANK YOU!!!!!! - a sleep deprived nursing student who's trying to self teach herself stats
holy cow, you made that so easy to understand! i can't believe none of my teachers could explain it so simply! thank you so much! research methods has been the bane of my existence because i just can't seem to process it!
and i'm doing my masters in clinical and health psych at UWL btw, and i almost dropped out because of the research methods aspect of it! i'm an otherwise A student and graduated magna cum laude with my BSc! so really, i can't thank you enough!
I hope you all find this video useful! If you have any questions, please do drop me an email. And if the video has REALLY helped and you want to buy me a beer, please see www.paypal.com/donate/?hosted_button_id=L692FVF8PNUKU
I'm currently in a research methods class and this video has really helped me figure out main effects. My teacher gave us an exam including main effects and didn't explain at all like you did. Thank you.
Thank you Jim for this simple explanation about the two topics. At min. 6:30 (about interaction) I suggest to note the difference on 1h and 24h of caffeine on the percent correct/ y-line.. The difference of 10 (percent) is on the y-line/vertical line. Regards and keep this up!
I am having my very last exam of my whole study in 2 hours and this topic was something I just could not wrap my head around. Now it finally make sense to me. (And it is so ironically that I am sleep deprived and only working on caffeine fuel). Thank you!
A good way to describe the interaction in words: "The type of supplement given (caffeine or placebo) moderated the effects of sleep deprivation on memory recall (or whatever other dependent variable)." Correct me if I am wrong. I am in the process of trying to understand how to describe interactions in words, haha.
Thank you for this video!!! I was tied up in knots over my main effects and interactions as there was significant main effects but not interactions. Made perfect sense. Funny how you can spend 3years at uni being lost in statistics, yet a simple video works wonders :-D Thank you!
Thank you so much for this! Just one thing regarding the interaction effect. When I saw a few graphs showing two variables that cross each other while both variables had the same level of gradient, I at first thought there was no interaction effect. Since yes, one variable rises while the other one falls, but both had the same level of gradient. But there is still an interaction effect, as I found out. So I personally find it easier to memorize that there's always an interaction effect as long as the two variables aren't parallel.
Awesome job Jim! I only spent one whole week trying to understand anything at all about main and interaction effect, banging my head and hoping I could drill it in (thanks to a no-so-good UC Berkeley PhD psych teacher), and then you happened in my life!! (and this is a junior college psych class!!). Thank you!!!
Its pretty helpful, but when explaining about finding the averages between the 2 points and seeing if they are main effects, you never actually say if they are main effects or not. Or if the averages are indeed different, so that they are main effects.
Amazing video! Very well explained, thank you. Do you have another video where you explain how to test whether these effects are significant or not? Would be greatly appreciated!
Thank you. I hink you only forgot to mention that if they will eventually INTERSECT on one end of the lines ( which in this case yes they will intersect on the upper left) meaning if we used a different amount of caffeine in the pill or had them skeep deprived less than 1 hour. No intersection = no interaction.
thank you SOOOO MUCH. I have a single course exam tomorrow, if i pass im gonna graduate. If i had money i would definitely buy a bottle of fine champagne but i dont :( I HOPE I PASS TOMORROW
Hi Kason (I can't reply directly as you've used a linked comment!) - yes, that's a great way of wording the interaction! Bear in mind it doesn't describe *what* that moderation was (i.e. did it make the effect of sleep deprivation get worse, or better?), so you might need to add a qualifying statement. Good stuff, though!
What a great video! I appreciate it so much, I wonder if you can go into describing the kind of interactions there are and the qualitative and quantitative aspects of an interaction? I see that they are diverging but it's hard for me to understand what that means. Would this be a quantitative interaction because caffeine strengthens the other Independent variable? (Behavioral Stats Exam coming up this week) Thank you again!
what was the value of the interaction? I understand that the change in the caffeine pill sample was small, 10, and the change in the placebo was great, 75, so does this make the interaction effect 65? thanks :)
Funny that the example was sleep deprivation, because I fell asleep during the lectures on main effects and interactions and missed learning this. Thank you so much for helping me out!
Hahaha, perfect :)
lmao same i just didnt show up to lecture
amazing explanation, thanks boss
The easiest to understand explanation of all the different videos i have looked at. Perfect! Thank you!
After reading text books , reading so many articles and research paper and seeing many youtube videos I thought of giving up the topic but at last I found your video and it made the concept all clear. Thanks a lot from India for uploading such nice video on this complex topic.
Oh my goodness! I finally get it! Thank you so much for making this topic so understandable.
This is a super helpful explanation to a relatively complex topic, it makes it seem very intuitive and I wanted to thank the author of this video
Glad it helped! Thanks for watching.
For a now retired but still active biomedical scientist this is the best explanation I've ever seen of main effects and interaction
High praise indeed! Thank you so much :)
My lecturer would not stop going on tangents and then pausing only to attempt three more times to explain what these effects are. My test is tomorrow, you are a life saver. Thank you!
How did the test go?
After a day of trying to figure this out in my textbook, I finally looked it up on TH-cam. You just resolved a days worth of stress. Fuck the textbook. I’m using TH-cam from now on.
Hi Jim, thank you for your simplified version of understanding fANOVA!
Choosing the right statistical test gets quite difficult with many groups, and multi-dimensional output variables, this helped a lot!
Excellent video. Searching on TH-cam for the last hour or so for a clear explanation on the meaning of main effects and interaction and this video was the best by far.
I go to school in the U.S. and was so confused learning about this, but this video helped me understand factorial designs better, thank you!
the vid my professor attached to teach us this cuz it's an online class is 2 hours long. You just summed up 2 hours, held my attention, and made it make sense. omg THANK YOU!!!!!! - a sleep deprived nursing student who's trying to self teach herself stats
This sleep deprived Tilburg University student thanks you very much! Great explanation and very useful for my research note.
This is the video that helped my brain wrap around the topic main effect and interaction. Thank very much !
holy cow, you made that so easy to understand! i can't believe none of my teachers could explain it so simply! thank you so much! research methods has been the bane of my existence because i just can't seem to process it!
and i'm doing my masters in clinical and health psych at UWL btw, and i almost dropped out because of the research methods aspect of it! i'm an otherwise A student and graduated magna cum laude with my BSc! so really, i can't thank you enough!
WISH YOU WERE MY LECTURER
Thanks!
I hope you all find this video useful! If you have any questions, please do drop me an email. And if the video has REALLY helped and you want to buy me a beer, please see www.paypal.com/donate/?hosted_button_id=L692FVF8PNUKU
really good!Thank you very much!
THANK YOU SO SO SO MUCH!
This was so helpful and clear. I have struggled with this my entire undergraduate year.
Great explanation! Thank you.
Hi Jim, I didn't sleep well, I'm gonna take a big dose of caffeine, thanks for the advice :) and thank you a lot for the explanations.
Was going to send a few bob, but PayPal fee would have got as much as you! So sorry but thanks anyway
I'm currently in a research methods class and this video has really helped me figure out main effects. My teacher gave us an exam including main effects and didn't explain at all like you did. Thank you.
I'm not even from this uni and I wish you were one of my lectures 😔
Thank you Jim for this simple explanation about the two topics.
At min. 6:30 (about interaction) I suggest to note the difference on 1h and 24h of caffeine on the percent correct/ y-line..
The difference of 10 (percent) is on the y-line/vertical line.
Regards and keep this up!
Thank you so much Jim. That really made it clear. You have a superb way of explaining things.
I am having my very last exam of my whole study in 2 hours and this topic was something I just could not wrap my head around.
Now it finally make sense to me.
(And it is so ironically that I am sleep deprived and only working on caffeine fuel).
Thank you!
Most helpful. The best explanation I've seen on this. Thank you.
Very helpful video. Thank you for taking the time to post it and make it public.
My pleasure! Thanks for your feedback
Thank you this is so much more clear than the mess my lecturer left me with!!
THANK YOU THANK YOU THANK YOUUUUUUUUUUU!!! Sorry for the caps, but I've never seen SUCH A CLEAR explanation of this. THANK YOU!
Most useful exploration of this I have read or seen - thank you
Oh my GOODNESS thank you so much for this. My discussion went over it so quickly I didn't catch any of it! Thank you a thousand times over
This was a great explanation, especially describing how to interpret the line graph! Thanks!!
Been stuck on this in 2 days, this video cleared everything up. Thank you Jim!
Absolute pleasure!
AMAZING VIDEO. you're saving lives, my friend!
This helped so much to see it in a real example. My lecturer showed them as A and B so I had no idea what was happening
Glad it helped!
A good way to describe the interaction in words: "The type of supplement given (caffeine or placebo) moderated the effects of sleep deprivation on memory recall (or whatever other dependent variable)." Correct me if I am wrong.
I am in the process of trying to understand how to describe interactions in words, haha.
You have hit the bull's eye. Crystal clear explanation. Salute
Thank you very much for your explanation!!! This video really helps me understand better about main effects and interactions!!!
Thank you for this video!!! I was tied up in knots over my main effects and interactions as there was significant main effects but not interactions. Made perfect sense. Funny how you can spend 3years at uni being lost in statistics, yet a simple video works wonders :-D Thank you!
Very simple to understand the complex concept, thank you very much
Thank you! Such a great and clear explanation!
Thank you so much for this!
Just one thing regarding the interaction effect. When I saw a few graphs showing two variables that cross each other while both variables had the same level of gradient, I at first thought there was no interaction effect. Since yes, one variable rises while the other one falls, but both had the same level of gradient. But there is still an interaction effect, as I found out.
So I personally find it easier to memorize that there's always an interaction effect as long as the two variables aren't parallel.
That's a great way of thinking about it!
@@JimGrange. Thank you :) it's good to have this method confirmed by an expert haha
Awesome job Jim! I only spent one whole week trying to understand anything at all about main and interaction effect, banging my head and hoping I could drill it in (thanks to a no-so-good UC Berkeley PhD psych teacher), and then you happened in my life!! (and this is a junior college psych class!!). Thank you!!!
I'm really pleased it helped :)
Its pretty helpful, but when explaining about finding the averages between the 2 points and seeing if they are main effects, you never actually say if they are main effects or not. Or if the averages are indeed different, so that they are main effects.
Actually at the end he's doing so - there are main effects for both variables :)
Amazing video! Very well explained, thank you. Do you have another video where you explain how to test whether these effects are significant or not? Would be greatly appreciated!
I have an exam tomorrow for my research methods class, thank you for this video!
This is so great! Thank you for providing this to your students and the rest of the students in need of an explanation.
this makes so much more sense now, thanks!
That was the best video about this topic. Thanks a lot!
Thanks for making it short, sweet, and to the point! I wish my minister would do the same in church!
Clear explanation. This helps me a lot! Thank you~~
best explanation on this topic .Thank you.
Thank you so much!!!! .You save my final examination's score!!!
literally same
I'm not in your class but this is going to help me pass mine! Thanks Jim!
Thanks for the kind words!
I put this video in my pocket! Awesome and clearly to the point thank you!
Thank you so much!!! I was really struggling with this concept and not being able to wrap my head around it.
I'm glad it helped!
Thank you. I hink you only forgot to mention that if they will eventually INTERSECT on one end of the lines ( which in this case yes they will intersect on the upper left) meaning if we used a different amount of caffeine in the pill or had them skeep deprived less than 1 hour. No intersection = no interaction.
thank you - just completing the last assignment of my Research Methods in Education / online and this helped a lot Jim ! Cheers fro NZ :D
amazing explanation! THANK YOU
having exam about these atm and its so great that i found this video, thank you so much mate :)
Good luck in your exams!
this was beautifully described and the example was easy to interpret! thanks!!
Thank you! This made absolutely no sense before, and I just got a perfect score on a test after I listened to this! :)
thank you SOOOO MUCH. I have a single course exam tomorrow, if i pass im gonna graduate. If i had money i would definitely buy a bottle of fine champagne but i dont :( I HOPE I PASS TOMORROW
excellent. well simplified. i have clearly understood
Great explanation. Thank you.
Thanks! You really helped me understand this better.
thank u Jim.
A student from Greenwich university, this was VERY helpful!
My pleasure!
i got a 2:1 in my exam thank u :)
Superb! Congratulations! :)
Thank you sooooo much for this video!! My GPA has been saved.
Hi Kason (I can't reply directly as you've used a linked comment!) - yes, that's a great way of wording the interaction! Bear in mind it doesn't describe *what* that moderation was (i.e. did it make the effect of sleep deprivation get worse, or better?), so you might need to add a qualifying statement. Good stuff, though!
Very clear explanation--thanks, sir.
This is great, it really helped me understand main effect and interaction. Thank you!
Thank you sir for making sense of this topic :)
What a great video! I appreciate it so much, I wonder if you can go into describing the kind of interactions there are and the qualitative and quantitative aspects of an interaction? I see that they are diverging but it's hard for me to understand what that means. Would this be a quantitative interaction because caffeine strengthens the other Independent variable? (Behavioral Stats Exam coming up this week) Thank you again!
So clear to understand, thanks you so much!!!
Thank you!!! This was so helpful. Please keep posting videos!
I will! Email any requests to j.a.grange@keele.ac.uk!
Thank you so much, this really explained things clearly.
this was soo clear :)
Thanks for this video. It is easy to understand.
Thank you very much Jim. It help me a great deal.
much respect, i am now more prepared for my final tomorrow
Thank you so much! You just saved me for finals :')! Please keep uploading, you explain things perfectly :D
Wow, that's great to hear :)
Really good explaining!
This was phenomenal. - Neuroscience Master's Student
You are too kind; thank you!
AMAZING! Thank you so much for this!
This video helped clear things up. Thank you so much!
This was super useful! Thanks a bunch!
Thank you!!! This was very well explained & helped quite a lot
I'm seriously glad it helped!
Nice examples. Thanks.
really good explanation, thanks.
Thank you sooo much! So simple when explained in this manner!!!
what was the value of the interaction? I understand that the change in the caffeine pill sample was small, 10, and the change in the placebo was great, 75, so does this make the interaction effect 65?
thanks :)
Nice illustration mate!
great explanation ,thank you
Thank you from the University of Cape Town!
This was an awesome video, thank you for your help.
Pleasure!
best video on the subject
can we just say there is an interaction when slopes are different?
Thank you! This might have saved me
Great explanation, thank you.
Thank you for the great explanation
Well explained, thanks!