Sampling techniques

Question 1

who is opportunity sampling most used by?

Answer 1

psychology Students

Question 2

give three advantages of opportunity sampling?

Answer 2

• easy
• cheap
• quick

Question 3

in what type of experiment does opportunity sampling have to be used?

Answer 3

In natural experiments

Question 4

Name 3 disadvantages of opportunity sampling?

Answer 4

• creates a biased sample
• not representative sample
• people may decline to take part so could turn into a volunteer sample

Question 5

How are volunteer samples often obtained?

Answer 5

Through adverts

Question 6

what core study uses volunteer sample?

Answer 6

Milgram

Question 7

3 advantages of volunteer sampling?

Answer 7

• quick
• easy
• can reach a wide variety of participants

Question 8

1 disadvantage of volunteer sampling?

Answer 8

-The type of participants may not be representative as they could be more obedient or motivated

Question 9

How is random sampling defined?

Answer 9

where every member of the target population has an equal chance of been chosen ‘all names in the college in a hat’

Question 10

1 advantage of random sampling?

Answer 10

-is the best technique for providing an unbiased representative sample of the target population.

Question 11

2 disadvantages of random sampling?

Answer 11

• very time consuming

- sometimes impossible to carry out if every ones names are needed for example

Question 12

define stratified sampling?

Answer 12

classifying the population into categories and choosing a sample which consists of participants from each category in the same proportions of the populations .

Question 13

1 strength of stratified sampling?

Answer 13

-sample should be very representative of the target population

Question 14

1 weakness of stratified sampling?

Answer 14

-very time consuming

Question 15

when is snowball sampling used?

Answer 15

When members of your target population are difficult to contact such as student taking illegal drugs.

Question 16

How does snowball sampling work?

Answer 16

you would ask a person who fits into your target population to tell their friends about the study and ask them to get in touch and so on.