As one would anticipate, the MAP
patients’ scores were considerably poorer than
those of the normative samples. Executive function,
attention, inhibition, visuoperceptual processing,
and working memory components all appear
impaired in the patients with psychosis compared
to the normative control samples.
Future research comparing neuropsychological
performance of MA-dependent samples with
and without methamphetamine-induced psychosis
is warranted to understand the cognitive impairment,
if any, that psychosis contributes above
and beyond the impairment seen with chronic MA