Experimental design

What are the three types of experimental design?

Independent groups

Repeated measures

Matched pairs

How many groups of participant in independent groups?

2

How many conditions do participants do in independent groups?

1

What are the advantages of independent groups?

no order effects

lower chance of demand characteristics

easier to standardise

How many groups of participant in repeated measures?

1

How many conditions do participants do in repeated measures?

2

How do you control order effects in repeated measures?

counterblancing

What are the disadvantages of independent groups?

Participant variables

more participants

what are the advantages of repeated measures?

control participant variables

higher validity

fewer people required

What are the disadvantages of repeated measures?

order effects

demand characteristics

How many conditions do participants do in matched pairs?

1

How are matched pairs created?

a group of participants is collected, then another group is selected based on characteristics that may effect results

What are the disadvantages of matched pairs?

matching is difficult

cannot necessarily predict which characteristics are important

not perfect control

what are the advantages of matched pairs?

reduces participant variables

no order effects

reduced demand characteristics