People applying to volunteer for a neighbourhood recycling project complete a form asking on how many days in the previous month they separated all recyclable household waste. The panel choosing the volunteers will read each applicant's answers.
Explain how social desirability could affect the validity of these data.
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.