Liam and Noah are identical twins who grew up in the same family home and attended the same secondary school. Recently, they both completed a validated personality questionnaire as part of a careers workshop. They were surprised to find that Liam scored much higher for the trait of extraversion than Noah. Use your knowledge of genotype and phenotype to explain why their extraversion scores differed.
248 exam-style questions on AQA A Level Psychology Approaches in Psychology, covering Learning approaches, Cognitive approach, Biological approach, Psychodynamic approach (A-level only), Humanistic Psychology (A-level only), and Comparison of approaches (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.