Table 1.

Subscale scores provided by the Neuropsychological Impairment Scale (NIS).

Three summary scores
GMI	Global measure of impairment: Provides best general index of neuropsychological functioning.
TIC	Total number of symptoms endorsed.
SIM	Symptom intensity measure: ratio of GMI and TIC.
Seven clinical subscales
COG	Cognitive efficiency: Assesses general symptoms of NCI (eg, “I get confused easily”).
CRIT	Critical items: Assesses patient’s history of neurological illness or injury (eg, “part of my body feels numb”).
ATT	Attention: Assesses patient’s ability to attend and concentrate (eg, “I have trouble concentrating”).
MEM	Memory: Assesses patient’s memory (eg, “I have trouble remembering important things”).
L-V	Learning-verbal: Assesses learning and expressive speech (eg, “I have trouble learning new things”).
FRU	Frustration tolerance: Assesses irritability, anger and temper (eg, “I feel easily annoyed and irritable”).
ACD	Academic skills: Assesses ability to carry out daily activities involving computing and reading (eg, “I have trouble understanding what I read”).
Three scales measuring test attitude
DEF	Defensiveness: Provides indication of test-taking attitude (eg, “I like everyone I know”).
AFF	Affective disturbance: Provides an estimation of emotional state of the subject at the time of the test (eg, “I often feel sad and blue”).
INC	Internal inconsistency: Identifies inconsistent response pairs.