The cognitive impairments associated with schizophrenia have long been known to involve deficits in working memory (WM) capacity. To date, however, the causes of WM capacity deficits remain unknown. The present study examined selective attention impairments as a putative contributor to observed capacity deficits in this population.
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From http://schizophreniabulletin.oxfordjournals.org/content/early/2014/07/16/schbul.sbu101.abstract.html?papetoc