Table 4.

Correlations of category learning correct responding with cognitive and symptom scores.

	Prototype		Low distortion		High distortion		Random
	SC	HP	SC	HP	SC	HP	SC	HP
General intellectual ability
WAIS-R estimated full scale IQ	0.22	0.04	0.28	−0.07	0.40*	0.07	−0.20	0.26
Prefrontal cortex/executive function
WCST categories	0.47*	0.17	0.47*	0.18	0.64**	0.03	0.05	0.33
Prefrontal cortex/working memory
N-back two back number correct	0.09	a	0.18	0.60*	0.25	0.73*	0.13	0.67*
CVLT list A 1–5 total correct	0.11	−0.42	0.02	−0.05	0.02	−0.56*	−0.22	−0.53*
Attention
CPT vigilance correct	0.29	−0.14	0.31	−0.09	0.15	−0.02	0.11	0.30
Trail making form A	0.11	0.26	0.01	−0.13	−0.14	−0.14	0.14	−0.52*
Hippocampus/memory
WMS-R verbal paired-associates I total	0.36	−0.01	0.44*	0.38	0.41*	0.30	0.01	0.77*
Language
CVLT semantic cluster ratio	−0.12	−0.46	0.03	0.06	0.38	−0.35	−0.60*	−0.62*
Fluency F-A-S	−0.18	0.49	−0.18	−0.28	0.07	−0.11	−0.46*	0.15
Fluency animals-fruits-vegetables	−0.20	0.62*	−0.23	−0.30	0.06	−0.23	−0.13	0.03
Occipital-parietal/visual-spatial
Benton Line Orientation	−0.06	0.60*	0.06	−0.13	0.11	0.14	0.07	0.19
Symptoms
PANSS positive symptoms	−0.41*	–	−0.32	–	−0.07	–	−0.42*	–
PANSS negative symptoms	−0.32	–	−0.27	–	−0.15	–	−0.33	–

*Significant correlation at p < 0.05, **significant correlation at p < 0.01, a, no correlation calculated due to restricted range; SC, patients with schizophrenia; HP, healthy participants; WAIS-R, Wechsler Adult Intelligence Scale-Revised; WRAT-R, Wide Range Achievement Test-Revised; WCST, Wisconsin Card Sort Test; CPT, Continuous Performance Test; WMS-R, Wechsler Memory Scale-Revised; CVLT, California Verbal Learning Test; PANSS, Positive and Negative Syndrome Scale.