A psychologist wants to select the volunteer who is the most intelligent out of three volunteers for a follow-up study. Each volunteer completes an IQ test containing 40 reasoning, language and number problems. The number of correct answers is converted into an IQ score.
| Volunteer | Age (years) | Correct answers out of 40 | IQ score |
|---|---|---|---|
| Asha | 8 | 21 | 106 |
| Dylan | 11 | 25 | 97 |
| Kofi | 14 | 28 | 83 |
Explain one strength of comparing the volunteers using their IQ scores rather than only their numbers of correct answers.
Explain which volunteer the psychologist should select for the follow-up study. Use the data in your answer.
30 exam-style questions on OCR GCSE Psychology 2.1 Key Concepts, covering 2.1.1 Stages of development, 2.1.2 Brain development and the nervous system, and 2.1.3 IQ tests as a measure of intelligence. Each one has a worked solution and a mark scheme showing where the marks go.