A psychologist uses a repeated measures design to compare how accurately pupils identify emotions in colour photographs and in black-and-white photographs. Each pupil sees the same 12 faces in both conditions. In the second condition, some pupils identify more emotions correctly because they have already completed the task once.
State the order effect described in this study.
Give one way the psychologist could change the photographs to reduce this order effect.
182 exam-style questions on OCR GCSE Psychology 7.1 Planning Research, covering 7.1.1 Hypotheses, 7.1.2 Variables, 7.1.3 Experimental Designs, 7.1.4 Populations and Sampling, 7.1.5 Ethical issues, and 7.1.6 Dealing with ethical issues and BPS Code. Each one has a worked solution and a mark scheme showing where the marks go.