In a disorder characterized by heterogeneity, a risk variant at ZNF804A seems to delineate a patient subgroup characterized by relatively spared cognitive ability. Further work is required to establish whether this represents a discrete molecular pathogenesis that differs from that of other patient groups and whether this also has consequences for nosologic classification, illness course, or treatment.
Theory of mind deficits in schizophrenia have been parsed into mental state
reasoning and mental state decoding components. We report that mental state
decoding as measured by the ‘Eyes task’ better predicted social
function than mental state reasoning as measured by the ‘Hinting
task’ in 73 out-patients with chronic schizophrenia. Mental state
decoding task performance also partly mediated the influence of basic
neuropsychological performance on social function. We discuss these findings
in terms of the accumulating evidence that mental state decoding has
particular relevance for understanding deficits in social function in
schizophrenia.
NOS1 is associated with clinically significant variation in cognition. Whether this is a mechanism by which schizophrenia risk is increased (eg, via an influence on cognitive reserve) is yet to be confirmed.
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