Experimental Method Overview

Contains an overview for everything you need to know about the EXPERIMENTAL METHOD for AQA AS Psychology exam - Unit 1.

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  • Created on: 18-03-13 09:17
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Experimental Method Experimental Design
Advantages: Types of experiment designs:
Establish cause and effect
Reliability Independent Measures: testing two
SEPARATE groups, in DIFFERENT
Disadvantages conditions.
Less valid Repeated Measures: testing the same
Generalizability
group of people repeatedly
Matched Pairs: Independent Measures
Types of experiment methods:
design but with the individual
Natural Quasi Experiment: The IV is differences between the groups
naturally occurring and is not controlled e.g. sex, IQ, age, ethnicity
manipulated.
Laboratory Experiment: special
Advantages of INDEPENDENT measures:
environment, IV is manipulated by the No order effects; no fatigue or practise
experimenter. effects
Field Experiment: conducted in natural
environment Disadvantages of INDEPENDENT measures:
Individual Differences
Advantages of a LAB experiment:
Reliable Remedy: MATCHED PAIRS DESIGN.
Control of extraneous variables
Advantages of REPEATED measures:
Disadvantages of LAB experiment: No individual differences
Validity
Demand characteristics Disadvantages of REPEATED measures:
Order effects
Advantages of FIELD experiment:
Ecological validity REMEDY: COUNTERBALANCING; randomizing
Less demand characteristics order of activity.
Disadvantages of FIELD experiment:
Lacks reliability
Confounding/Extraneous variables

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