Scenario
An ergonomics researcher is investigating whether a newly developed split-ergonomic keyboard layout (Layout Alpha) reduces typing error rates compared to a standard straight keyboard layout (Layout Beta).
They recruit a sample of 45 professional administrative assistants. Each participant is asked to complete two 5-minute typing transcription tasks:
The order in which the participants completed the tasks was counterbalanced.
Identify one potential extraneous variable in this experiment. Explain how this variable might have influenced the results of the study.
Practise AQA A Level Psychology Scientific processes with exam-style questions for A Level Psychology. 689 questions, matched to the AQA A Level Psychology (7182) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.
