Research 4.2 Moderation 0.0 / 5 ? PsychologyResearch methodsUniversityNone Created by: CaliFishCreated on: 03-05-17 12:12 define moderation when the strength and or direction of the predictor and outcome relationship changes depending on the value of a third variable 1 of 23 moderation investigates ______ the predictor influences the outcome variable when 2 of 23 moderation is all about what interactions 3 of 23 what effects do you have in moderation 2 main effects (X>Y) and (M>Y) and 1 interaction effect (XM>Y) 4 of 23 How do you know if there is moderation the interaction effect is significant 5 of 23 what do you need to distinguish M and X a good theory 6 of 23 in moderation analysis you MUST do what account for the main effects of both the predictor and the moderation in the regression 7 of 23 otherwise what will happen the interaction and main effects are confounded, and a significant interaction cannot be interrpreted 8 of 23 because the value for the predictor change depending on the value of the moderator, what question do you have to ask yourself at what value of the moderator do we want to estimate the predictor 9 of 23 what does b1 mean the relationship between the predictor and the outcome 10 of 23 but what is the problem with it its estimated by SPSS when all other variables in the model are zero 11 of 23 this is what not useful 12 of 23 therefore what is the solution transform the variable so that it has a mean of zero 13 of 23 how do we do this grand mean centring 14 of 23 how do you grand mean centre subtract the mean from each participants score 15 of 23 when reporting moderation effects, because we have used the grand mean centering what do we need to mention at the mean of the __________ 16 of 23 how do we report the rest of it there was/was not a positive/negative relationship b = (b value), t = (t value), p < (p value), 95% CI [low, upper] 17 of 23 what type of analysis do you do after moderation analysis simple slopes 18 of 23 simple slopes analysis estimates the relationship between the predictor an outcome at how many levels of the moderator 3 19 of 23 what are these 3 levels low level (-1SD below mean), mean, high level (+1SD above mean) 20 of 23 when reporting the simple slopes analysis, what do we have to add in front when the *insert moderator name* is low/at the mean/is high 21 of 23 how do we report the rest of it here was/was not a positive/negative relationship b = (b value), t = (t value), p < (p value), 95% CI [low, upper] 22 of 23 What is the regression equation Y = B0 + B1X1 + Error 23 of 23
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