Flashcards in Qualitative research - sampling Deck (14)
What is a sample?
-representative section of the wider population
- aim = to generalise from the sample
-needs to be large enough to say with some certainty results are accurate
What is the aim of sampling in qualitative research?
-PPs actively pp in generation of the data
-aim of qual. research is to discover meaning - not to generalise
-so questions asked - decide on the sample
What is the sample in qualitative research?
- deliberately biased = STRENGTH
-using quantitative approaches would be a weakness
How are the sample selected?
-has person experienced phenomenon/culture?
-people who are knowledgeable, reflective and able to talk at length
-practicalities: cost, accessability, ethical issues
What is the sample like in qualitative research?
-30-40 in ethnography or GT
When does the sample emerge in qualitative studies?
-as the study progressess
What are the types of sampling in qualitative research?
convenience, snowball, purposive, homogeneous, theoretical
What is convenience sampling?
-often begin with this
-easy and efficient but not ideal
-e.g. 20 personal students
-start this way but then need to sample more purposefully to get as much info as possible from few PPs
What is snowball sampling?
-ask PPs for others with similar experiences e.g. friends of PPs
-lead to limited sample and ethical issues
What is purposive (purposeful) sampling?
-most studies move on to this
-selecting people who will be most informative
-e.g. maximum variation sampling
What is homeogeneous sampling?
-opposite of maximum variation sampling
-used if want to focus on a particular group and understand them well
-e.g. male STNs first placement
What is theoretical sampling?
-used in grouded theory
-finds PPs who will help the researcher to build the theory
-e.g. socialisation of STNs into ward culture - select certain STNs who have had particular experiences and can offer insight
How do qualitative researchers decide on sample size?
-principle called data saturation guides sample size
-sampling stops when enough data have been collected to describe/explain the issue + no new ideas are emerging
-size = not pre-determined