A developmental psychologist carried out a structured, controlled observation of caregiver-infant interaction. She observed an infant girl interacting separately with her mother and her grandmother. Using a time-sampling technique over a set duration, she recorded the infant's primary behaviour during each interval. Her findings are shown in Table 1 below.
Table 1: Frequency of behaviours displayed by the infant when interacting with her mother and grandmother
| Reciprocal smiling | Looking away | Crying | Total | |
|---|---|---|---|---|
| Mother | 14 | 7 | 4 | 25 |
| Grandmother | 6 | 14 | 5 | 25 |
| Total | 20 | 21 | 9 | 50 |
In what percentage of the total observations was the infant displaying reciprocal smiling when interacting with her mother?
Show your calculations.
235 exam-style questions on AQA A Level Psychology Data handling and analysis. Each one has a worked solution and a mark scheme showing where the marks go.