Schizophrenia Overview (Edexcel A-Level Psychology): Flashcards
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Schizophrenia main characteristics
Schizophrenia main characteristics
Distortions of thought, perception & emotion; social withdrawal
Positive symptoms (Type 1)
Positive symptoms (Type 1)
Add to experience: delusions, hallucinations, disorganised speech
Negative symptoms (Type 2)
Negative symptoms (Type 2)
Subtract from normal: avolition, low energy, social withdrawal
Most common schizophrenia hallucination type
Most common schizophrenia hallucination type
Auditory (hearing things that aren't there)
Dopamine hypothesis
Dopamine hypothesis
Increased dopamine/hypersensitive D2 receptors cause symptoms
MZ twin concordance rate (Gottesman 1991)
MZ twin concordance rate (Gottesman 1991)
48% concordance
Schizophrenia prevalence in population
Schizophrenia prevalence in population
0.3 to 0.7 percent
Enlarged brain ventricles linked to
Enlarged brain ventricles linked to
Negative symptoms & worst outcomes
Frith's theory: schizophrenia caused by
Frith's theory: schizophrenia caused by
Increased self-awareness; can't filter cognitive 'noise'
Diathesis-stress model
Diathesis-stress model
Biological vulnerability + environmental stressors = disorder