Sampling Techniques
- Created by: brooke34
- Created on: 29-01-19 16:35
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- Sampling Methods
- Snowball sampling
- If not easy to gain sample, gatekeeper used to gain access to the group. When introduced to one the more etc.
- If someone doesn't want to take part then they don't have to (ethics) its easy to get sample after access found
- Risk that nobody will want to respond and bias sample due to non random selection. Unrepresentative
- Gatrell - Hard Labour (parenthood)
- Random sampling
- Uses all members of the target population (equal chance of getting picked)
- EG picking names from a hat.
- Likely to be unbiased and representative as no control over who is chosen
- Can't be used on large sample as time consuming. Risk of not being representative
- Crime Survey of England and Wales
- Volunteer sampling
- Invite people to participate in research (advert)
- Unrepresentative as as only those interested will respond
- Highly ethical as people willingly take part
- Thomas and Znaniecki - Polish immigrants
- Systematic sampling
- Takes every nth name from the sample (every 3rd name)
- If sampling frame is organised then even, so high representative
- If the initial frame isn't random the can be bias in selecting
- Opportunity sampling
- Made up of people available at the time of the study
- Easiest technique and it quick and cheap to produce
- Not representative as those who are available may be certain type of person
- Stratified sampling
- Population is split into divided up then from each a sample is taken.
- Can get equal proportions of gender etc so representative
- It is very time consuming and hard to find a balance of the sample
- Quota sampling
- Doesn't require frame, calculates how many of each type needed them approaches
- It's cost-effective and quite easy and quick to make
- The sample selection ins't random so can lead to bias.
- Snowball sampling
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