An educational researcher wants to investigate how different auditory environments affect academic performance. To do this, they plan to conduct a laboratory experiment to compare the impact of two background noise types (upbeat instrumental music vs. simulated coffee shop ambient chatter) on the number of complex algebraic equations correctly solved by secondary school pupils in a 20-minute period.
Evaluate the external validity of this planned study.
201 exam-style questions on OCR A Level Psychology Planning and conducting research. Each one has a worked solution and a mark scheme showing where the marks go.