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151710
Experimental Design
Description
IB Psychology (Research Methods) Mind Map on Experimental Design, created by Eleanor Matthewman on 22/07/2013.
No tags specified
psychology
research methods
psychology
research methods
ib
Mind Map by
Eleanor Matthewman
, updated more than 1 year ago
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Created by
Eleanor Matthewman
about 11 years ago
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Resource summary
Experimental Design
Repeated measures- testing the same group of people in different conditions
Advantages
Avoids the issue of PpsV
fewer people are needed
Disadvantages
order effects
demand charactorics
Independent groups- testing separate groups of people. Each group is tested in a different condition
Advantages
Quick and easy
avoids order effects
Disadvantages
higher risk of PpsV
More people are needed
Matched pairs- testing separate groups of people where one member of each group is the same age, sex, ethnicity etc as a member of another group
Disadvantages
time consuming finding pairs
never an exact match (except identical twins)
Advantages
Reduces PpsV
Avoids order effects
Defintions
Random allocation is randomly assigning people to different groups. Independent groups
Counterbalancing is reversing the order of the conditions for half of the Pps to reduce order effects. Repeated measures
Order effects are when a pps experiences both experimental and control conditions, their performance may be affected
The control groups is the group that does not experience the IV
The experimental groups is the group that experiences the IV
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