3. Moderation and Mediation Flashcards
Why is centring often used in moderation?
Where predictor values don’t have zero values (e.g. heart rate) better to centre around the grand mean instead.
What should be done if interaction is not significant?
Just interpret main effects.
What is an interaction?
A combined effect of two variables (the IV and the MV)
Explain simple slopes analysis?
Calculations generated for the predictor and outcome relationship at low (1 SD below Mean), average (Mean) and high levels (1 SD above Mean) of the moderator.
What is the Johnson & Neyman technique?
Similar to SSA but with more more values of the moderator
What is a zone of significance?
between two moderator values where the predictor does not significantly predict the outcome
What does Preacher & Kelly’s kappa-squared represent?
% of maximum possible effect size for a mediation effect
