experimental designs Flashcards
what are the 3 forms of experimental designs?
-independent group design
-repeated measures design
-matched pairs design
what are order effects
two types:
-negative (participants perform worse due to fatigue or boredom)
-positive (participants perform better due to practice/learning
what are independent group designs? (IGD)
uses different participants in each experimental condition, so each participant only does one
advantages of IGD?
-no order effects
-low demand characteristics
-saved time
weaknesses of IGD?
-more participants needed
-group differences
what are repeated measures designs? (RMD)
each participant is tested in all conditions of an experiment (tested against themselves)
advantages of RMD?
-no group differences
-more data and fewer participants
weaknesses of RMD?
-order effects
-demand characteristics
-takes more time
what are matched pair designs? (MPD)
a kind of RMD
participants are matched on characteristics, then put into separate groups
advantages of MPD?
-no order effects
-no demand characteristics
-less group differences
weaknesses of MPD?
-more participants
-matching is difficult
-time-consuming
