collection of participants

Question 1

random sampling

Answer 1

names of target population are drawn out randomly, where everyone has an equal chance of being selected.
+ eliminates researcher bias
- can still end up unrepresentative

Question 2

opportunity sampling

Answer 2

the researcher selects participants who are available at that time
+ quick and easy
- experimenter bias

Question 3

volunteer/self-selected

Answer 3

participants put themselves forward to participate
+ ethical as the pps want to take part
- unrepresentative as only certain people are likely to volunteer

Question 4

systematic sampling

Answer 4

selecting every nth person from the target population
+sample is evenly spread out across the target population= no researcher bias
- doesnt include representation of subgroups

Question 5

stratified sampling

Answer 5

working out proportions of the different types of people in the target population
+ very representative
- time consuming

Question 6

snowball sampling

Answer 6

the researcher chooses 1 participant, that participant will pick the next participant and so on.
+ quick and easy
- unrepresentative sample