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Research Design

The main features of Research Design
by

David Hayward

on 14 November 2013

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Transcript of Research Design

Research Design
An expert guide
There are three types of Research Design:
Repeated Measures
This is when the same group of participants complete both conditions of the IV
Independent Groups
This is when different groups of participants complete are used in each condition of the IV
Matched Pairs
Different participants are used in each condition of the IV, but they are matched beforehand on characteristics which may affect performance in the experiment; such as IQ or reading ability
Strengths of Repeated Groups
Participant Variables (Individual differences) are kept constant
More powerful statistics can be used
Fewer participants are required
Weaknesses of Repeated Groups
Order Effects can occur such as practice or boredom.
Though Counterbalancing can be used to get around this.
Different tests may be needed in each condition to avoid practice
Demand Characteristics are more likely, due to the fact that participants see both conditions of the experiment
Strengths of Independent Groups
Order effects do not occur as each participant only completes one condition of the IV
Demand Characteristics are less common due to each participant only completing one condition
The same test can be administered in each condition, as there are no Order Effects
Weaknesses of Independent Groups
Participant variables are different, such as differing levels of intelligence
More Participants are required
Strengths of Matched Pairs
Participant variables are kept constant
No Order Effects
Less Demand Characteristics
The same tests can be used in each condition
Weaknesses of Matched Pairs
You can never match all variables in all respects
Matching Participants is difficult and time consuming
More Participants are required
Be very careful not to mix up

Research DESIGN
with
Research METHOD
Research METHOD refers to the TYPE of research we are doing, for instance: Lab Experiment, Correlation, Observation, etc.
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