Big 4 And Samplibg Techniques Flashcards
What is a gatekeeper
A person who does have contact with a relevant if appropriate set of individuals ensure the safeguarding of participants and researchers
What is the research/target population
Refers to all those people who could be included in the research
What are some strengths of random sampling
Equal chance of being picked, not biased
What are some weaknesses of random smiling
Could lack representativeness, time consuming as so many people pull out of study
Strengths of systematic sampling
Everyone has the same chance of being picked
Weaknesses of systematic sampling
Not always representative
What is stratified sampling
Different subgroups in the target population are identified then randomly selected from subgroups
Strengths of stratified sampling
Representative, not biased, preferred by positivists
Weaknesses of stratified sampling
Small sample, sampling frame might not include certain groups
What is quota sampling
Researcher has a clear idea of the sample they want and where you find it
Strengths if quota sampling
Useful when there’s no sampling frame, more representative then non random samples
Weaknesses of quota sampling
No sampling frame=less scientific, more difficult to repeat, researcher might be biased to a certain group
What is snowball sampling
One contact will recruit others to join in research
Strengths of snowball sampling
Useful when no sample frame, good to use for studies on difficult to access groups
Weaknesses of snowball sampling
No sampling frame, weakens representativeness
What is purposive/opportunity sampling
Researcher has a clear idea of the sample they want and pick participants
Strengths of purposive/opportunity sampling
Useful when there is no sample frame, useful when a specific type of person is needed
Weaknesses of purposive/opportunity sampling
Biased, no sampling frame- weakening representativeness
What is volunteer sampling
Sample gathered through participants volunteering
Strengths of volunteer sampling
Useful when there is no sampling frame, quick and easy to get a large sample, useful when a specific type of person is needed
Weakness of volunteer sampling
May be made up of the same type of people, biased and subjective to researcher
