Quota, Opportunity And Judgement Sampling Flashcards
What is quota sampling
The population is divided into groups
A certain number of people from each group has to be interviewed
When is the method of quota sampling used
Interviewers carry out in public places (e.g high streets) the interviewer gets to chose the members they ask so it isn’t random
What is quota sampling also known as
Stratified sampling
Pros of quota sampling
It’s quick
Gives representation to different groups
Any member of the sample can be replaced by one with the same characteristics
It can be done if you have no sample frame
Cons of quota sampling
Can easily be biased as the people are choosen by the interviewer
People who refuse to take part may all have similar points of view on the topic being surveyed
What is opportunity sampling
Where a sample is taken from a section of the population present at one particular time and place
Why is the sample not random
Because the sample is chosen out of ease and convenience
Pros of opportunity sampling
Easy to take a sample at a time and place that suits the interviewer
Don’t need a sample frame
Cons of opportunity sampling
There’s no attempt to make the sample representative of the population being surveyed
Can be very biased
What is judgement sampling
The researcher uses their judgement to choose a sample that they think represents the population
When is judgment sampling useful
When investigating something that is obscure or very specific because the researcher may be an,e to choose a more representative sample than other sampling methods could
Pros of judgement sampling
Can be quick to do
Might be the only suitable method to use
Cons of judgement sampling
The researcher could be unreliable
It’s non random so could be very biased
