부산대학교 도서관

Objective: The Test of Premorbid Functioning (TOPF) is the new measure of estimated premorbid intelligence for the Wechsler Adult Intelligence Scale-Fourth Edition (WAIS-IV). The standardization study provides useful information about the validity of this measure; however, findings have not been replicated. Methods: A mixed clinical sample of 83 veterans (96% men) with an average age of 55.7 years (SD = 13.5) and average education of 12.7 years (SD = 2.5) was administered the TOPF as part of a neuropsychological evaluation. Participants were placed into three diagnostic groups: Dementia (n = 19), Cognitive Disorder (n = 36), and No Impairment (NI; n = 28). Pearsonʼs r was used to examine relationships between TOPF, WAIS-IV, and other neuropsychological measures. A one-way ANOVA was conducted to examine group differences in TOPF minus WAIS-IV FSIQ (i.e., difference) scores. Results: The TOPF exhibited significant correlations with WAIS-IV indices (r ranged from .21 to .81) in all three groups. The Cognitive Disorder group exhibited significant correlations between TOPF and phonemic fluency (r = .51), mental flexibility (r = .40), verbal learning (r = .38), and confrontation naming (r = .35), while there were no significant correlations observed in either the Dementia or NI groups. The Dementia group showed a larger average difference score (14.7) than both Cognitive Disorder (7.2) and NI groups (3.8), which did not differ significantly from each other. Conclusions: In a mixed clinical sample, the TOPF demonstrated good convergent validity and adequate divergent validity. The difference score differentiated the Dementia group from the Cognitive Disorder and NI groups, further establishing its construct validity as a measure of estimated premorbid intelligence.