Interaction Effects in Multiple Regression Analysis

Ch. 1. Regression with SPSS

Ch. 7. Regression with SPSS

http://psych.unl.edu/psycrs/statpage/quantint.pdf

http://quantpsy.org/interact/interactions.htm

http://essedunet.nsd.uib.no/cms/topics/regression/7/2.html

https://www.youtube.com/watch?v=l3Aoikhaxtg

https://www.youtube.com/watch?v=aeT8MkG3bx8

https://www.youtube.com/watch?v=aVV7KnAr-qY

https://www.youtube.com/watch?v=vYsjJpyrHFc

https://www.youtube.com/watch?v=SdOrkPn7d8Y

https://statistics.laerd.com/spss-tutorials/ancova-using-spss-statistics.php

http://www.ats.ucla.edu/stat/spss/whatstat/