A psychologist uses a laboratory experiment to investigate whether encouraging feedback affects persistence. Each participant works on the same set of difficult anagrams in a controlled study room. Halfway through the task, a computer displays either the message "You are doing well" or the message "Please continue". The psychologist records how long each participant continues trying to solve the final anagram before giving up.
Explain one strength of the laboratory experiment in this study.
139 exam-style questions on OCR GCSE Psychology 7.2 Doing Research, covering 7.2.1 Experiments, 7.2.2 Interviews, 7.2.3 Questionnaires (Surveys), 7.2.4 Observations, 7.2.5 Case Studies, and 7.2.6 Correlations. Each one has a worked solution and a mark scheme showing where the marks go.