chapter  17
12 Pages

Cognitive models of psychosis, the jumping to conclusions reasoning bias and improving psychological treatment for delusions

WithPHILIPPA GARETY, DANIEL FREEMAN, SUZANNE JOLLEY

Cognitive models of psychosis Cognitive models of the positive symptoms of psychosis specify the cognitive, social and emotional processes hypothesized to contribute to their occurrence and persistence (Bentall, Corcoran, Howard, Blackwood, & Kinderman, 2001; Birchwood, 2003; Fowler, 2000; Freeman, Garety, Kuipers, Fowler, & Bebbington, 2002; Garety, Bebbington, Fowler, Freeman, & Kuipers, 2007; Garety, Kuipers, Fowler, Freeman, & Bebbington, 2001; Morrison, 2001). In 2001, we proposed that psychotic symptoms might be better understood by linking social, psychological and neurobiological attempts at explaining the phenomenological experiences (Garety et al., 2001). We argued that cognitive models are an important link in the chain from phenotype to genotype, providing a psychological description of the phenomena from which hypotheses concerning causal processes implicated in specific symptoms can be derived and tested.