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9 Cards in this Set
- Front
- Back
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Random Sample |
Every Person in a given target population has an equal chance of being selected. Its necessary to have a list of every person in a target population |
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Self selected sample |
A sample who volunteer/ put themselves forward often through advertisement |
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Oppurtunity Sample |
Researcher selecting anyone who is available ad willing to take part in the research |
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Random Sampling Advantage |
Sample is representative as everyone had an equal chance of being selected.. generalisble |
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Random Sampling Disadvantage |
Difficult to obtain a list of all target population so some psychologists argue its impossible to achieve a truly random sample |
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Self selected Sample Advantage |
representative as anyone can apply to participate so representative |
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Self selected sample disadvantage |
Only certain types of people will volunteer themselves therefore results are likely to be biased to one type of person...less generaliable |
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Opportunity Sample Advantage |
Quick and easy to do as pps are available so its economical for researchers
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Opportunity Sample Disadvantage |
pps are likely to have similar backgrounds.. not representative of different groups of people..not generalisable |
