A researcher is conducting a face-to-face laboratory experiment to investigate if the post-event verb used in a question (e.g., 'smashed' vs 'hit') affects participants' estimated speed of a vehicle in a recorded video.
Investigator effects may influence the results of this study. Explain how the researcher could modify the procedure to reduce these investigator effects.
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.