Cognitive performance is classically measured through measures of central tendency. However, intraindividual cognitive variability (IIV) also holds important information about cognitive functioning.

Cognitive dysfunction is a central feature of psychotic disorders. In schizophrenia (SZ), group-level performance within key cognitive domains has been reported to be 1-2 standard deviations (SD) ...

Please provide your email address to receive an email when new articles are posted on . Adults with chronic insomnia had more variability in several measures, like sleep latency, vs. good sleepers.