theory Flashcards
(7 cards)
1
Q
why is mediation used?
A
- to investigate why something happens
- can indicate that X affects M in turn affects Y
2
Q
what is full mediation?
A
entirety of association between X and Y is explained by M
3
Q
what is partial mediation?
A
some but not all of the association between X and Y is explained by M
4
Q
Confidence intervals and simple linear regression
A
Uses the line created by the regression and the confidence intervals to create a plausible range of values for Y given the value of X
Creates the prediction interval of Y
5
Q
What is a residual?
A
the vertical distance between a point on the scatter plot from the line
residual = observation - fitted value
6
Q
how would you test the significance of a simple linear regression?
A
a one sample t test
7
Q
why would you use confidence intervals to study mediation?
A
- can calculate the full indirect effect rather than two separate effects
- confidence intervals are used to to assess the significance of this
- this indirect effect is significant if the confidence interval does not contain 0
