Experimental Design Flashcards
1
Q
What are the types of experimental designs?
A
- Repeated measures
- Independent groups
- Matched pairs
2
Q
What is an independent group design?
A
- One group takes part in condition 1, whereas another group takes part in condition 2.
- Ppts are randomly allocated to the conditions
3
Q
Strengths of independent measures?
A
- removing investigator bias
4
Q
Weakness of independent measures?
A
- ppt variables
- individual differences
- need more ppts than repeated measures
5
Q
What is repeated measures design?
A
Same ppts take part in both conditons
6
Q
Strength of repeated measures?
A
- eliminates individual differences
- can use counter balancing to control for order effects
7
Q
Limitations of repeated measures?
A
- order effects (practise effect)
- demand characteristics
- time consuming
8
Q
A
9
Q
What is the matched pairs design?
A
Match ppts on key characteristics (age, IQ, gender) and the pairs are randomly allocated to either one or the other conditions
10
Q
Strength of matched pairs?
A
- reduced ppts variables
- no order effects
- best people to use are MZ twins
11
Q
Weakness of matched pairs?
A
- time consuming
- need more ppts than repeated measures
- ppts not identical so there may be some ppt variables
12
Q
What is the two types of counterbalancing?
A
- ABBA
- AB or BA
13
Q
What does the AB BA do?
A
- allows for comparison
- reduces order effects as they are balanced out
- splits ppts in half
14
Q
What does the ABBA
A
- All ppts take part
- scores on trial 1+4 compared
