Experimental Methods
- Created by: JuliaMabiza
- Created on: 08-04-19 20:04
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- Experimental Methods
- Laboratory Experiment
- to investigate causal relationships under controlled conditions.
- Strengths: well controlled, extraneous/confounding variables are minimised, high internal validity, easily replicated, high external validity
- Limitations: rtificial, lack of mundane realism, low ecological validity, problems with demand characteristics
- Field Experiment
- to investigate causal relationships between an IV and DV in more natural surroundings, pps are not usually aware of being studied.
- Strengths: less artificial, usually higher mundane realism and high ecological validity
- Limitations: less control of extraneous/confounding variables, reduces internal validity, more time consuming and more expensive
- Natural Experiment
- to investigate relationships between IV and DV where the IV cannot be directly manipulated
- Strengths: allows research where IV cannot be manipulated for ethical reasons, enables psychologists to study real problems , increased mundane realism.
- Limitations: cannot demonstrate causal relationships as IV is not directly manipulated, random allocation is not possible, so no control of confounding variables.
- Quasi Experiment
- the IV is naturally occurring and the DV may be measured in a lab, the IV is simply difference between people that exist
- Strengths: allows comparisons between types of people
- Limitations: pps aware of being studied so reduces internal validity
- Variables
- extraneous variables
- confounding variables
- dependent variables
- independent variables
- Validity
- internal validity
- external validity
- population
- temporal
- ecological
- Laboratory Experiment
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