Dr. Vance conducted an investigation into the effectiveness of systematic desensitisation for treating cynophobia (fear of dogs). To assess the therapy's success, Dr. Vance himself interviewed the participants after their final session, asking them open-ended questions about how comfortable they now feel around dogs.
Explain one improvement that Dr. Vance could make to his study in terms of validity.
205 exam-style questions on Edexcel A Level Psychology Content, covering Main features of classical conditioning, Pavlov (1927) salivation in dogs, Main features of operant conditioning, Properties of reinforcement, Behaviour modification and shaping, Main features of social learning theory, Social learning stages, Bandura (1961, 1963) Bobo doll experiments, Bandura (1965) vicarious reinforcement, Learning theories and phobias, Treatments for phobias, Individual differences, and Developmental psychology. Each one has a worked solution and a mark scheme showing where the marks go.