Callum is investigating cooperative and solitary play choices made by toddlers and decides to use the observational method. For one 15-minute recess session, he observed the play categories of children in a local nursery's outdoor yard. Callum gathered quantitative data during his observation.
Explain two improvements Callum could make to his investigation.
638 exam-style questions on Edexcel A Level Psychology Methods. Each one has a worked solution and a mark scheme showing where the marks go.