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.
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.