A sports psychologist is conducting an experiment to investigate whether high-intensity interval training (HIIT) improves athletic stamina more than traditional steady-state cardio. The psychologist, who is a passionate advocate for HIIT, personally administers the stamina test to all athletes, offering verbal encouragement throughout the physical trials.
Outline one way the psychologist could prevent investigator effects from influencing the findings of this 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.