rsp experimental design

What is a repeated measures design?

one group repeating task

ALL P TAKE PART IN ALL CONDITION

what is independant measures design

2 groups do the same condition (task)

p allocated to 2 groups where each group represents on experimental condition

What are matched pairs design?

2 groups are mathced on certain variables

pairs of p are matched on some variables that may affect the dv. then one member of the pair is assigned to condition a then the other to b.

what are the negatives of repeated measures

order effect-repeating 2 task could create boredom and fatigue.

p more liley to work out the aim

what are the positives of repeated measures

fewer p needed

p varibale controlled

pperfomanace may improve

what are the positives of using independant measures

order effect are not a prblem

what are the negatives of using independant measures

less economical

more time consuming

the p are not the same

what are the positives and negatives for mathced pairs

p only take part in single condition so order effect and demand characteristics are less of problem.

p can not always be matched directly

time consuming and expensive