Research Methods
- Created by: hbarrowlewis
- Created on: 26-09-18 18:08
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- Sampling Methods
- Opportunity Sampling
- Unrepresentative samples can be biased. Only a subgroup of the population.
- Convenient and ethical. There is a wide variety of participants.
- This is where the experimenters select participants available at the time
- Stratified Sampling
- Time consuming and needs to have a large sample size
- This is where the experimenter divides the population into subcategories. Participants are randomly selected from the subgroups.
- It is more likely to be more representative because there is a proportional and randomly selected representation of subgroups.
- Random Sampling
- Can be time consuming and too small of a sample can lead to bias.
- Provides good chances of representative sampling- everyone has an equal chance of being selected
- This can be done by pulling names out of a hat or asking people in the street
- Volunteer Sampling
- This is when a researcher will ask for volunteer. For example, putting an ad in the newspaper or advert
- Quick and convenient. Consent has already been given
- Unrepresentative as volunteers are different to typical members of the population
- Systematic Sampling
- Unbiased
- Obtain a sample by selecting every nth person. Interval is consistent
- Not truly unbiased unless selecting a number using a random method
- Opportunity Sampling
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