Sampling Methods

Random Sampling

Every person in the target population has an equal chance of being chosen.

Strength

No researcher bias

Weakness

Unrepresentative/ Biased sample which could lead to inaccurate conclusions

Volunteer Sampling

People from the sample frame come forward to be tested

Opportunity Sampling

Researcher uses Ps who are on hand at that time

Snowball sample

Participants are intially recriuited by the psychologist and then those participants further recruit

Stratified Sample

target group is divided into sub groups then the participants are selected randomly from each group

Quota sampling

Target frame is divided into sub groups and the researcher choses the participants at their convenience

Systematic Sampling

every nth person on a list is selected by researcher