Fichas
topic 25 - selection of participants
Fichas del conjunto (21)
- 1what are the three sample types?-opportunity
-volunteer
-random - 2what is as opportunity sample?produced by selecting people who are most easily available at the time e.g. stopping people in the street
- 3what is a volunteer sample?a sample of participants produced by asking for volunteers e.g. putting an advert in the newspaper or noticeboard
- 4what is a random sample?produced using a random technique where everyone in their target population has an equal chance of being selected e.g. drawing participants from a hat
- 5what is a strength of an opportunity sample?its the easiest method
- 6why is it easier?you use who is closest to you so it takes less time
- 7what is a limitation of using an opportunity sample?inevitably bias and lacks representativeness
- 8why is it bias?sample is drawn from a small part of the population e.g. students from one school don't represent the countries school population
- 9what is a strength of a volunteer sample?can give access to a variety of participants
- 10give an example of this?people who read a newspaper can be a wider sample that stopping people in a street
- 11what is a limitation of the volunteer sample?participants may be more highly motivated or have extra time on their hands
- 12what is this known as?volunteer bias
- 13what does this mean?participants may be more willing thus more susceptible to experimenter bias
- 14what is a strength of a random sample?unbiased
- 15why is it unbiased?all members of the target population have an equal chance of selection
- 16what is a limitation of random sampling?it takes more time and effort than other sampling methods
- 17why?you need to obtain a list of all the members in the target population, select your sample and then contact them
- 18what is a target population?the group of people the researcher is interested in
- 19what is sampling?-the process of taking a sample
-sampling methods aim to produce a representative selection of the target population - 20what happens if the sample isn't representative?the study then lacks ecological validity
- 21what are stratified quota samples?groups of participants are selected according to their frequency in the population
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- A-Level (RESEARCH METHODS) Psychology A2 Fichas sobre topic 25 - selection of participants, creado por Charlotte Hewson el 22/04/2015.
- Creado por
- Charlotte Hewson
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