Chapter 13

Question 1

Marginal means

Answer 1

Arithmetic means for each level of IV averaging over levels of the other IV. If sample size is equal-marginal means are simple average. If sample size unequal-marginal means will b computed using weighted average, counting larger sample more.

Question 2

Main Effect

Answer 2

In factorial design, overall effect of one IV on DV, averaging over levels of IV.

Question 3

Participant Variable

Answer 3

Variable such age, gender, ethnicity whose levels are selected (measured), not manipulated.

Question 4

Cell

Answer 4

Condition in an experiment, simple experiment-cell represent level of one IV, in a factorial design-cell represents one of the possible combinations of two IV.

Question 5

Factorial design

Answer 5

Study in which there are two or more IV or factors.

Question 6

Interaction effect

Answer 6

Result fr factorial design, in which difference in levels of one IV changes, depending on level of other IV; difference in differences.