Elena conducted a laboratory experiment using mice to investigate how different schedules of reinforcement affect the rate of operant response. Ahead of her investigation, she secured the necessary Home Office licences for animal research. She randomly allocated the mice to one of two conditions: Group A received food pellets on a fixed-interval schedule, while Group B received food pellets on a variable-interval schedule. Elena then registered the total number of lever presses made by each mouse during a 15-minute conditioning trial in a Skinner box.
State the independent variable (IV) and dependent variable (DV) for Elena's study.
Practise Edexcel A Level Psychology Content with exam-style questions for A Level Psychology. 1,059 questions covering Diagnosis of mental disorders (4 Ds), Classification systems (DSM and ICD), Schizophrenia and one other disorder, Treatments for the two disorders, Individual differences, and Developmental psychology, matched to the Edexcel A Level Psychology (9PS0) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.
