A psychologist observes teamwork at a community gardening project, comparing sessions with labelled and unlabelled tool stations.
Which example is observer bias?
Two observers use the vague category "working well" and record different totals for the same sessions.
The observer expects fewer disagreements at labelled stations and leaves the disagreements seen there off the tally.
The researcher gives fuller task instructions before labelled-station sessions than before unlabelled-station sessions.
The sample includes only retired volunteers, but the findings are applied to community gardeners of every age.
173 exam-style questions on OCR GCSE Psychology 7.3 Analysing Research, covering 7.3.1 Types of Data, 7.3.2 Measures of central tendency, 7.3.3 Other descriptive statistics, 7.3.4 Tables, Charts and Graphs, 7.3.5 Reliability, 7.3.6 Validity and effects on validity, and 7.3.7 Sources of bias. Each one has a worked solution and a mark scheme showing where the marks go.