In Experiment 2 of the study by Loftus and Palmer (1974) investigating eyewitness testimony, what was the independent variable manipulated by the researchers?
Whether the participants reported seeing broken glass when questioned one week after watching the video clip.
The presence of physical broken glass in the car accident video shown to the participants.
The phrasing of the initial question about the vehicles' speed (using the verb 'smashed', 'hit', or receiving no speed question).
The length of the delay (777 days) between watching the video clip and completing the follow-up questionnaire.
163 exam-style questions on OCR A Level Psychology Memory, covering Loftus and Palmer (1974): Eyewitness testimony and Grant et al. (1998): Context-dependent memory. Each one has a worked solution and a mark scheme showing where the marks go.