sampling 0.0 / 5 ? PsychologyResearch methods and techniquesA2/A-levelAQA Created by: boogluvrCreated on: 18-06-21 20:43 define population a group of people who are the focus of the researchers interest, from which a smaller sample is drawn 1 of 17 define sample a group of people who take part in a research investigation. drawn from the target population 2 of 17 what is random sampling? all members of the target population have an equal chance of being selected 3 of 17 how do you take a random sample? a list of name from a target population is made. each name is assigned a number. 'lottery method' used to pick numbers at random. 4 of 17 what is a stratified sample? The make-up of the sample reflects the make-up of the target population 5 of 17 what is systematic sampling? A participant is selected in a systematic way, for example, selecting every 10th person from the electoral roll. 6 of 17 how do you make a systematic sample? through a sampling frame, where a list of the target population is put in order and then every nth name/number is selected 7 of 17 how do you make a stratified sample? Once certain quotas are identified (e.g. gender), the participants to fill them are selected at random from the target population. 8 of 17 what is an opportunity sample? Participants are selected from whoever is most easily available 9 of 17 how would you make an opportunity sample one method would be to stand in the street one afternoon and approaching passers-by to see if they want to take part. 10 of 17 what is a volunteer sample? Participants put themselves forward to take part in a study 11 of 17 how do you make a volunteer sample? a newspaper or internet advert is placed asking for volunteers, and people respond agreeing to take part. 12 of 17 what is 1 strength and 1 weakness of random sampling? + no researcher bias - time consuming 13 of 17 what is 1 strength and 1 weakness of systematic sampling? + no researcher bias - may end up with biased sample 14 of 17 what is 1 strength and 1 weakness of stratified sampling? + representative - can't account for all sub groups 15 of 17 what is 1 strength and 1 weakness of oppurtunity sampling? + convenient - researcher bias 16 of 17 what is 1 strength and 1 weakness of volunteer sampling? + less time consuming - attracts a certain type of person 17 of 17
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