Experimental Design (D) Flashcards
1
Q
What is a lab experiment?
A
IV is manipulated in an unnatural setting
2
Q
Evaluate Lab experiments
A
- high control of extraneous variables
- high internal validity
- causal relationship can be established
- Low ecological validity
3
Q
What is a field experiment
A
When IV is manipulated in a natural environment
4
Q
Evaluate Field experiments
A
- High ecological validity
- less control of EVs
- low internal validity
5
Q
What is a quasi-experiment?
A
When the IV is an uncontrolled personal characteristic of the ppt
6
Q
Evaluate Quasi experiments
A
- enables researches to study IVs that can’t be studied in lab/field
- IVs are not randomly allocated so participants may cause confounding variables
- Low internal validity
7
Q
What is a natural experiment?
A
The IV is a naturally occurring event eg mental health after a school shooting
8
Q
Evaluate Natural experiments
A
- studies IVs which would be impractical or unethical otherwise
9
Q
Explain matched pairs design
A
- 2 groups where ppts are matched by important characteristics (ie 2 groups of twin split up)
10
Q
A
11
Q
Evaluate independent groups design
A
- No order effects
- Decreases likelihood of demand characteristics
12
Q
Explain repeated measures design
A
ppts take part in control and experimental tasks
13
Q
Evaluate repeated measures design
A
- less ppts/saves time and money
- Control of variables (scores are from same participant
- Order effects (may be tired or influenced by first task)
14
Q
Explain independent groups design
A
Each ppt only tests out one condition
