Zusammenfassung der Ressource
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