Experimental Designs (AO1 + AO3) Flashcards
1
Q
3 Types of Experimental Designs
A
independent groups design
repeated measures design
matched pairs design
2
Q
Independent Groups Design
A
2 separate groups of ppts who experience 2 different conditions of the experiment. all ppts experience 1 level of the IV only
3
Q
Positives of Independent Groups Design
A
- less order effects (boredom)
- reduces demand characteristics
- results more valid
4
Q
Negatives of Independent Groups Design
A
- ppt differences, could use random allocation
- more expensive + time consuming bc more ppts
5
Q
Repeated Measures Design
A
all ppts experience all different conditions of the experiment, ppts experience every level of the IV
6
Q
Positives of Repeated Measures Design
A
- less costly
- less time consuming due to less ppts
- reduces ppt variables as all ppts take part in all conditions
7
Q
Negatives of Repeated Measures Design
A
- order effects e.g. boredom, practice
but can be reduced through counter-balancing - demand characteristics
8
Q
Matched Pairs Design
A
ppts are paired together on a variable relevant to the experiment e.g. IQ + 1 experience condition 1 - the other experiences condition 2
9
Q
Positives of Matched Pairs Design
A
- less order effects
- less demand characteristics
- less ppt variables bc of the matching
10
Q
Negatives of Matched Pairs Design
A
- matching is expensive + time-consuming bc more ppts
- cant match ppts exactly so other variables can still affect the experiment
