Sampling Techniques

Question 1

What is a Sampling technique?

Answer 1

This refers to how we recruit participants

Question 2

Describe and evaluate Random Sampling

Answer 2

Each member of the population has an equal chance of being selected e.g putting names in a hat from a list and drawing sample
+ Not biased
- Time Consuming (list and ppt might refuse)

Question 3

Describe and Evaluate Systematic Sampling

Answer 3

Choosing every nth from target population list to take part
+ Its reduces bias by being an objective method
- Time consuming
- Chance of selecting similar ppts

Question 4

Describe and Evaluate Stratified Sampling

Answer 4

Target population split into subgroups (strata) and ppts are selected in a random basis
+ Represenative (high population validity)
- Time consuming
- Cannot account for all subgroups

Question 5

Describe and Evaluate Opportunity Sampling

Answer 5

Asking people who are available and willing to take part in the study
+ Quick and easy (Convenient)
- Unrepresentative
- Risk of bias
- May obtain similar ppts / bias

Question 6

Describe and Evaluate Volunteer Sampling

Answer 6

Study is advertised e.g noticeboard and newspaper and ppts contact you if they choose to take part
+ Quick and Easy
+ Reduced researcher bias
- Demand Characteristics
- Volunteer Bias

Question 7

What is Volunteer Bias?

Answer 7

The sample is eager to please the researcher (not representative)

Question 8

What are 3 Sampling Procedures?

Answer 8

1) Event sampling
2) Time sampling
3) Point sampling

Question 9

Event Sampling

Answer 9

Counting the number of times a particular behaviour (event) occurs in a target individual or group

Question 10

Time Sampling

Answer 10

Recording behaviour within a pre-established time frame

Question 11

Point Sampling

Answer 11

Observing each participant one-by-one