A developmental psychologist wants to investigate whether playing an interactive educational app on a tablet leads to better vocabulary acquisition in 3-year-old children compared to reading an illustrated picture book. The researcher designs an experiment where children are randomly allocated to either the tablet app group or the book group for a 20-minute session. Afterwards, their retention of 10 target words is tested using a picture-matching task.
Explain why it would be appropriate for the researcher to conduct a pilot study before carrying out this experiment.
689 exam-style questions on AQA A Level Psychology Scientific processes. Each one has a worked solution and a mark scheme showing where the marks go.