Identify which investigation is a laboratory experiment.
A researcher changes the lighting level in a quiet room and measures how accurately participants check a page of text.
A researcher changes the direction signs in a museum and records the number of visitors who take a wrong turn.
A researcher compares route-planning test scores from adults who grew up in a city with scores from adults who grew up in the countryside.
An observer watches visitors in a public garden and records which routes they choose without changing the setting.
139 exam-style questions on OCR GCSE Psychology 7.2 Doing Research, covering 7.2.1 Experiments, 7.2.2 Interviews, 7.2.3 Questionnaires (Surveys), 7.2.4 Observations, 7.2.5 Case Studies, and 7.2.6 Correlations. Each one has a worked solution and a mark scheme showing where the marks go.