Sampling Techniques
- Created by: hollydolly98
- Created on: 04-03-16 20:36
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- Sampling techniques
- Target population- group of people researcher is interested in
- Opportunity sample
- Sample of ppts produced by selecting people there at the time.
- + Easiest method- use first ppts you can find.
- - Inevitably biased- sample drawn from small part of target population.
- Random sampling
- Produced by using a random technique, e.g. drawing people from a hat
- +Unbiased- all members of target population have equal chance of being selected.
- - Takes more time and effort than other methods.
- Self-selected sample
- Ppts volunteer
- +Convenient way of finding willing ppts.
- +Ppts less likely to drop out.
- - Biased, Volunteers likely to have similar charcteristics, volunteer bias.
- Snowball sampling
- Relies in referrals from initial ppts to generate additional ppts.
- + Enables researcher to locate groups of people who are difficult to access.
- -Sample not likely to be good cross-section from population, friends of friends.
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