OCR GCSE Psychology · J203
Paper 1, Paper 2
Revise: Populations and SamplingThis is sampling bias: the selection process systematically favours some members of the population over others. It matters because the apparent pattern in the data may reflect who was recruited rather than the population as a whole.
- Revise: Data Types, Sources and Sampling
A systematic tendency for the selection process to over-represent or under-represent particular members of the target population.