Corollary-and discrepancy-based approaches for examining the appropriateness of premorbid cognitive estimation in geriatric schizophrenia.

摘要

OBJECTIVE: This article addresses whether measures for assessing premorbid intellectual functioning are adequate for geriatric schizophrenia. METHOD: We included geriatric schizophrenia-spectrum disorders (SSD; n = 37), frontotemporal dementia (FTD; n = 41), and geriatric controls (n = 107), and employed measures of verbal ability. RESULTS: Pearson's correlations and ANOVAs for discrepancy comparisons showed unique patterns of spared function in SSD when compared to FTD and controls. CONCLUSIONS: Findings lend support to the specificity of cognitive processes in SSD, even when accounting for processes common to the theoretically similar FTD. SSD showed a distinct pattern of spared ability which supports clinical utilization of discrepant measures of premorbid intellectual estimation for SSD.