In their contemporary study, Carlsson et al. (2000) proposed a model of schizophrenia that relies on 'brake' and 'accelerator' systems involving neurotransmitter pathways.
Explain how the disruption of these 'brake' and 'accelerator' systems is proposed to cause both positive and negative symptoms of schizophrenia.
18 exam-style questions on Edexcel A Level Psychology Studies, covering Classic study: Rosenhan (1973), Contemporary study (schizophrenia): Carlsson et al., Contemporary study (depression): Kroenke et al., Contemporary study (depression): Williams et al., Contemporary study (anorexia): Scott-Van Zeeland et al., Contemporary study (anorexia): Guardia et al., Contemporary study (OCD): Masellis et al., and Contemporary study (OCD): POTS team / March et al.. Each one has a worked solution and a mark scheme showing where the marks go.