Researchers conducted a laboratory experiment to investigate whether selective attention (measured via reaction times on a computerized Stroop task) differs when participants are tested in a hot environment (32°C) compared to a temperate control environment (19°C).
To ensure internal validity, the researchers implemented several control measures, including:
Explain how to improve the effectiveness of the two controls used in the 'Thermal Attention' study.
186 exam-style questions on Edexcel A Level Psychology Research methods and skills, covering Research methods and skills. Each one has a worked solution and a mark scheme showing where the marks go.