Sample selection and Technique Flashcards
1
Q
Random sample
A
- A sample of participants produced using a random technique such that every member of the target population has an equal chance of being selected
2
Q
Positive of Random sample
A
- Unbiased, all members of the target population have an equal chance of selection
3
Q
Negative of Random sample
A
- Takes more time and effort than other techniques because you need to obtain a list of all the members of your target population, then identify the sample and then contact the people identified and ask if they will take part
4
Q
Stratified sample
A
- Participants are selected from different subgroups in the target population in proportion to the subgroup’s frequency in that population
5
Q
Positive of Stratified sample
A
- It is the most representative of all sampling techniques because all the subgroups are represented and these subgroups are represented in proportion to the numbers in the target population
6
Q
Negative of Stratified sample
A
- This method involves a very lengthy process and those participants selected may not always agree to take part
7
Q
Volunteer sample
A
- A sample of participants produced by asking for people willing to take part
8
Q
Positive of Volunteer sample
A
- A convenient wat to find willing participants
- Researchers need committed participants for time consuming studies and participants are less likely to drop as they volunteered
9
Q
Negative of Volunteer sample
A
- Volunteer may also be more willing to be helpful and thus may be more prone to guessing the aims of the study and responding to demand characteristics
10
Q
Opportunity sample
A
- A sample of participants produced by selecting people who are most easily available at the time of the study
11
Q
Positive of Opportunity sample
A
- The most convenient technique because it takes little preparation
- You just use the first participants you can find
- This means it takes less time to locate your samples
