Experimental designs

Question 1

types of experimental design

Answer 1

Repeated measures
Independent groups
Matched pairs

Question 2

Independent groups

Answer 2

Only perform in one condition of the IV

Str: No order effects
Limits demand characteristics: less likely to guess aim of study

Lim: Participant variables: diff abilities of participants can cause changes to DV
More partipants needed

Sol: Random allocation solves partcipant variables: same chance of being in each condition

Question 3

Repeated measures

Answer 3

Same participants in all conditions of the IV

Str: eliminates participant variables
Fewer participants needed- less time consuming

Lim: order effects
eg boredom or practice effect

Sol: counterbalancing

Question 4

Matched pairs

Answer 4

Pairs of participants are matched on some variable that has been dound ti affect the DV

One member does one condition
One member does the other

Str: no order effects

Lim: Time consuming, expensibe
Large pool of potential participants needed
Difficult to know variables are appropriate for matching

Sol: Conduct a pilot study to consider which key variables might be important when matchinh