experimental design

what is the difference between experimental design and experimental type?

experimental design - how participants are allocated to the different groups in an experiment

experimental type - the conditions the experiment is conducted in

what is a repeated measures design?

all participants take part in all conditions.

the DV is measured for each group and results are compared

what is a strength of repeated measures?

the DV is not affected by individual differences

what is a weakness of repeated measures?

may be affected by the practice/order effect so counterbalancing is needed

what are independent groups?

two groups are exposed to different experimental conditions

what is a strength of independant groups?

prevents practice effect and demand characteristics

what is a weakness of independent groups?

can result in false conclusions because of individual differences