A researcher compares two ways of controlling an on-screen maze. Each of 24 adults completes an unfamiliar maze using a touchpad. Immediately afterwards, every adult repeats the identical maze using the arrow keys on a keyboard. The researcher records the completion time in seconds for each attempt.
Explain one weakness of the experimental design used in this study.
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.