Exam 1

1. Metainformation

   Tag	Value
   file	Inferential_Statistics_uu-Mediation-807-en_uu-Mediation-807-en
   name	uu-Mediation-807-en
   section	Inferential Statistics/Regression/Multiple linear regression/Mediation
   type	schoice
   solution	FALSE, FALSE, TRUE, FALSE
   Type	Case
   Language	English
   Level	Statistical Literacy

   Question

   A study of conflict resolution (Y) in adolescents measures extraversion (X) and examines the level of aggression (M). It is examined whether M is a mediator. One does two steps:

   1. regression with Y as dependent and X as independent variable. (2) regression with M as dependent and X as independent variable.

   Assuming significant results in steps (1) and (2), what is the next step?

   
   
   1. FALSE: Regression with Y and M as independent variables and X as dependent.
   2. FALSE: Regression with X and Y as independent variables and M as dependent.
   3. TRUE: Regression with X and M as independent variables and Y as dependent.
   4. FALSE: Regression with Y as independent variable and X as dependent.
   
   

   Solution

   To test mediation, we examine the following four steps: 1. Is there a significant relationship between X and Y? 2. Is there a significant relationship between X and M? 3. Is there a significant relationship between M and Y, when controlling for M? 4. Is the relationship between X and Y still significant, when controlling for M?

   Steps 1 and 2 have been undertaken. The next step is to do a regression analysis with X and M as independent variables and Y as dependent. The results of this analysis can be used for both Step 3 and Step 4.