research methods: experimental designs

Question 1

what are the 3 types of experimental design?

Answer 1

.independent groups design
.repeated measures
.matched pairs

Question 2

what is an independent groups design?

Answer 2

.each participant only takes part in one condition of the IV

Question 3

what is a strength to the independent group design?

Answer 3

.lower risk of demand characteristics, as naive patients only do one condition
.no order effects -such as practice or fatigue as they only do one condition

Question 4

what is a negative to an independent group design?

Answer 4

.individual differences means it’s hard to compare groups

Question 5

what is a repeated measures design?

Answer 5

.each participant takes part in all conditions of the IV

Question 6

what are the strengths to a repeated measures design?

Answer 6

.controls for individual differences so psychologist can be more certain that any difference is due to IV

Question 7

.what are the negatives to a repeated measures design?

Answer 7

.higher risk of demand characteristics than IGD
.risk of order effects

Question 8

.what is a matched pair design?

Answer 8

.participants matched with another participant who share a relevant characteristic for the study, e.g. same IQ
.then split randomly into different conditions of the IV.

Question 9

what are the strengths to a matched pairs design?

Answer 9

.reduces the effect of participant variables
.no order effects, such as practice or fatigue, as only do one condition

Question 10

.what is a negative to the matched pairs design?

Answer 10

.cannot match participants exactly, so individual differences
so still an issue.