Eduqas A-Level Psychology A290QS
Biological Approach
Psychodynamic Approach
Behaviourist Approach
Cognitive Approach
Positive Approach
Comparing the Five Approaches
Core Studies in Social and Developmental Psychology
Planning Psychological Research
Data Handling, Statistics and Mathematical Skills
Evaluating and Validating Research
Personal Investigations and Novel Research Scenarios
Addictive BehavioursAddictive
Autistic Spectrum BehavioursAutistic spectrum
Bullying BehavioursBullying
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Controversies in Psychology
Planning Psychological Research
Participants and sampling: Self-selected sampling
- 3 things to know
- Component 2
Overview
Recall questions on Participants and sampling: Self-selected sampling.
What you need to know
Answer each one before you reveal it.
What is event sampling in an observation?
Which observational sampling technique suits a behaviour that occurs rarely, and why?
Questions from this subtopic
Each one with the model answer underneath.
- 1
What is self-selected sampling?
Model answer
It means the participants volunteer themselves, typically by responding to an advertisement, a poster or an on-line appeal.
- 2
Give one strength and one weakness of self-selected sampling.
Model answer
It is easy to arrange and yields committed participants who are less likely to drop out, but volunteers tend to share characteristics such as curiosity and eagerness to help, which is known as volunteer bias.
- 3
What is snowball sampling?
Model answer
One participant who fits the criteria is recruited and then asked to put the researcher in touch with others they know who also fit, so the sample grows through personal contacts.
- 4
When is snowball sampling especially useful, and what is its main drawback?
Model answer
It is useful for reaching hidden or hard-to-reach groups who have no available sampling frame, but because participants recruit people like themselves the sample is likely to be narrow and unrepresentative.
- 5
What is event sampling in an observation?
Model answer
The observer counts every occurrence of a specified behaviour throughout the whole observation period.
- 6
Give one strength and one weakness of event sampling.
Model answer
No instance of the target behaviour is missed, so the count is complete, but if the behaviour happens very frequently the observer may be overwhelmed and fail to record some of it.
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