A psychologist wants to investigate why current first-year apprentices miss training sessions. A college offers the psychologist two existing sources of data.
| Source | Existing data |
|---|---|
| A | The number of training sessions attended by each apprentice on last year's course |
| B | Written answers from exit interviews in which apprentices who left last year's course described difficulties attending training |
The psychologist proposes using Source A alone.
Explain whether Source A should be used alone. Compare how well Sources A and B fit the aim and suggest what the psychologist should do next.
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.