I’m currently reading an article (Meeus et al., 2009, Study 1; see below) that hypothesised for interaction effects, but failed to find any. What’s puzzling me is the entry of variables into the moderated regression and their interpretation after no interactions were found:
Step 1: Gender
Step 2: Predictor Variables
Step 3: Experimental Condition (Dummy)
Step 4: Two-Way Interactions (Predictors x Dummy)
Step 5: Three-Way Interactions (etc)
Having failed to find a significant interaction, the authors discuss Model 3 – the one with the dummy-coded condition. Is this correct? How is Model 3 to be interpreted? I ask because I have a very similar study that also failed to find any interactions, but the predictors explain a large amount of variance in one group, but not the other (if I were to run two separate HMRs). I was wondering in what way I could report this.
Meeus, J., Duriez, B., Vanbeselaere, N., Phalet, K., and Kuppens, P. (2009). Examining Dispositional and Situational Effects on Outgroup Attitudes. European Journal of Personality. 23 (4), p307-328.
Mr. Anon your description seems to make sense. in this case I would do exactly what they did, assuming the same model describes your experiment. An excellent text that describes such things is here: https://b-ok.cc/book/3591248/4df2ac
You will want to consult the material on Factorial designs. As you will see your conclusions are not supported and your reference author's are. BTW I would recommend the University of Virginia material at this link as well:
https://www.google.com/search?client=firefox-b-1-d&q=university+of+Viginia+Research+Moderation+Mediation
Please ask if you have further questions,
Best wishes, David Booth
Mr. Anon your description seems to make sense. in this case I would do exactly what they did, assuming the same model describes your experiment. An excellent text that describes such things is here: https://b-ok.cc/book/3591248/4df2ac
You will want to consult the material on Factorial designs. As you will see your conclusions are not supported and your reference author's are. BTW I would recommend the University of Virginia material at this link as well:
https://www.google.com/search?client=firefox-b-1-d&q=university+of+Viginia+Research+Moderation+Mediation
Please ask if you have further questions,
Best wishes, David Booth
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