Experimental Designs

Experimenatal designs also useful for A2s

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  • Created by: Kinsy
  • Created on: 21-09-09 21:02
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EXPERIMENTAL DESIGNS
This is where each participant performs in only one condition of the
experiments conditions.
Twice as many ps needed
than a repeated measures
INDEPENDENT MEASURES DESIGN
design = more time needed
DCs are less = slows the pace of the
likely to occur Situational variables research
Ps variables may occur and then
No order effects as confound the results, e.g if you asked
ps only perform once questions about slim/ obese people,
their own weight may affect
perceptions of the person in the photo
DISADVANTAGES
This is where each ps performs in each of the experiments
ADVANTAGES
conditions.
DCs more likely to occur than an
Same ps in each condition
independent measures design
= No ps variables effect results
= Cannot confound results REPEATED MEASURES DESIGN
Requires fewer ps than an There will be a smaller range
independent measures design since
data is collected from same group
The same as independent measures design but ps are pre-matched
across conditions on variables relevant to the research.
Reduced effects of It could be practically
REPEATED MEASURES DESIGN
ps variables difficult to establish
matches
Requires twice as many ps as a
No DCs occur as ps only
repeated measures design
perform in one condition
= Requires extra time and effort
to gather the sample

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