Module 8

Question 1

factor

Answer 1

any discrete categorical variable

Question 2

Primary or focal independent variable

Answer 2

When a study has two or more IVs it is usually helpful to determine which is the primary or focal IV

Question 3

Moderator

Answer 3

the second independent variable may moderate the effect of the primary independent variable - often called a moderator

Question 4

Population model

Answer 4

represent how two independent variables combine to explain individual differences in the dependent variable

Question 5

Main effects model

Answer 5

for the dependent variable as a function of the two independent variables

the dependent variable is an additive function of the predictors - the effects of the dummy variables are simply added together to explain the dependent variable

Question 6

Intercept in a main effects model

Answer 6

Intercept parameter corresponds to the model-implied or predicted population mean for participants in the (iv reference category) who (dependent reference category)