Lecture 7a: Complex Experimental Designs

Question 1

What are the two ways that basic experimental designs can be made to be more complex?

Answer 1

• by including more than one IV
• by comparing across more than 2 conditions of IV

Question 2

Why can including more than one conditions of IV in a between-subjects be complex?

Answer 2

can have more than one difference between the IV conditions

Question 3

Why can including more than one conditions of IV in within-subjects design be complex?

Answer 3

still need to counterbalance conditions and to account for more than two IV conditions means there we will be even more counterbalanced orders
- need to be in reason when choosing number of levels/conditions

Question 4

What are factorial research desgins?

Answer 4

research designs where there are 2 or more IVs each of which has 2 or more levels/conditions

Question 5

What do researchers have to consider when doing factorial research designs?

Answer 5

main effects and interaction effects

Question 6

What are main effects?

Answer 6

the effect of each individual IV on the DV

Question 7

What are interaction effects?

Answer 7

the combined effect of the two IVs on the DV

Question 8

How would you know if there is an interaction effect in a factorial research design?

Answer 8

if effect of one IV differs across conditions/levels of the other IV

Question 9

What kind of research design can factorial research designs be?

Answer 9

• fully between-subject
• fully within-subjects
• mixed factorial design

Question 10

What must researchers consider when choosing an experimental design?

Answer 10

• research question, hypothesis, operational definitions
• resources
• parsimony