u2 rm1 Experimental designs

what is an experimental design

how participants are used in different conditions

what are repeated measures

do both condtions right after another

what are the advantages of repeated measures

Need fewer participants

No individual differences

what are the disadvantages of repeated measures

Participants effects such as demand characteristics -> behaviour in the second condition might change

 order effects

what are independent groups

group split each half do one different condtions

what are the advantages of independent groups

fewer demand characteristics

no order effects

what are the disadvantages of independent groups

individual differences between participants

Need more participants

what are matched pairs

matches participants according to relevant participnat variables to see how recat to two different condtions

how are matched pairs matched

Participants are matched according to relevant participant variables then allocated randomly to a condition and then do another one

what are the advantages of matched pairs

Reduces individual  differences between  groups

No order effects

Reduces demand characteristics

what are the disadvantages of matched pairs

Difficult to match participants