Research Methods - Sampling Techniques Flashcards
1
Q
Target population
A
- group researchers are studying and want to generalise their results to
2
Q
What are sampling techniques used for?
A
- obtain sample of target population = avoid studying entire population = long + expensive
3
Q
Sample
A
- should be representative of the population
- should have same characteristics as population
4
Q
Random sampling
A
- every member of target population has the same chance of being selected
E.g. random name generator
5
Q
Random sampling adv = large
A
- if target population is large + large sample is drawn = likely sample is representative = results can be generalised to the target population
6
Q
Random sampling adv = bias
A
- no researcher bias selecting the sample
- sample chosen by chance = no conscious choice from researcher
- equal chance for everyone
7
Q
Random sampling dis = difficult
A
- sometimes difficult to get full details of a target population from which to select a sample
E,g,not possible to get a full list of all women in the uk
8
Q
Random sampling did = willing
A
- not all members of target population who are selected will be available or willing to take part = unrepresentative sample
- sample size reduced if people refuse to take part
9
Q
Systematic sampling
A
- participants are selected by taking every Nth person from a list
10
Q
Systematic sampling adv
A
- simpler than random sampling = only requires a list of the target population + researcher decides to select every nth person.
- less effort
11
Q
Systematic sampling dis = hidden periodic trait
A
- process of selection can interact with a hidden periodic trait within the population = not representative
12
Q
Systematic sampling dis = willing
A
- not all members of target population who are selected will be available or willing to take part = unrepresentative sample
- sample size reduced if people refuse to take part
13
Q
Stratified sampling
A
- classifying population into categories + randomly choosing sample that consists of participants from each category in the same proportions as they are in the population
- representative sample
14
Q
Stratified sampling adv
A
all groups within a population are included = representative
15
Q
Stratified sampling dis
A
- very time consuming = categories have to be identified and calculated
- struggle if you don’t have all the details of people in your target population