Assumptions correlation - Answers 1) Independent observations
2) Normally distributed errors
3) Linearity
Measurement level correlation - Answers Continuous
Assumptions regression analysis - Answers 1) Independent observations
2) Normally distributed errors
3) Linearity
4) Homoscedasticity
5) Multicollinearity
Measurement level regression analysis - Answers • Dependent (outcome) variable: continuous
• Independent (predictor) variable(s): continuous or dichotomous
Assumptions mediation/moderation - Answers Same as regression analysis:
1) Independent observations
2) Normally distributed errors
3) Linearity
4) Homoscedasticity
5) Multicollinearity
Measurement level mediation - Answers • Dependent (outcome) variable: continuous
• Independent (predictor) variable: continuous or dichotomous
• Mediator: continuous
Measurement level moderation - Answers • Dependent (outcome) variable: continuous
• Independent (predictor) variable: continuous or dichomotomous
• Moderator: continuous or dichotomous
Conditions for mediation - Answers 1) Predictor variable must significantly predict the outcome variable
(c)
, 2) Predictor variable must significantly predict the mediator (a)
3) Mediator must significantly predict the outcome variable (b and c')
4) Predictor variable must predict the outcome variable less strongly (c > c')
Assumptions ANOVA - Answers 1) Independent observations
2) Normally distributed errors
3) Homoscedasticity
Measurement level ANOVA - Answers • Dependent (outcome) variable: continuous
• Independent (predictor) variable: categorical (nominal)
Assumptions ANCOVA - Answers 1) Independent observations
2) Normally distributed errors
3) Homoscedasticity
4) Linearity between outcome and covariate
5) Homogeneity of regression slopes between outcome and covariate
6) Independence of treatment and covariate -> treatment groups have equal means on each covariate
7) Multicollinearity of covariate (if > 1 covariate)
Measurement level ANCOVA - Answers • Dependent (outcome) variable: continuous
• Independent (predictor) variable: categorical (nominal)
Covariate: continuous or dichotomous
Assumptions Repeated Measures ANOVA - Answers 1) Independent observations
2) Normally distributed errors
3) Sphericity
Measurement level repeated measures ANOVA - Answers • Dependent (outcome) variable: continuous
• Independent (predictor) variable: categorical (nominal)
Assumptions mixed ANOVA - Answers 1) Independent observations
2) Normally distributed errors