Abstract

Objective: Brief, ecologically-valid functional assessment of daily activities is an important part of a neuropsychologist's repertoire. The Texas Functional Living Scale (TFLS) assesses several independent activities of daily living with four subscales-Time, Money and Calculation, Communication, and Memory-and an overall severity index (SI). The SI has adequate psychometrics, but research on the subscales is lacking. This study evaluated the TFLS subscales, with a focus on convergent and divergent validity. Method: Participants were 201 ethnically diverse (52% White, 35% Hispanic, 12% Black) veterans (91% male), with a mean age of 60.57 (SD = 11.66) and a mean education of 12.92 (SD = 2.83), from an archival sample. Measures were chosen to reflect domains we believed would converge (i.e., language, memory, working memory) and diverge (i.e., processing speed, visual-spatial abilities). Using the TFLS, Wechsler Adult Intelligence Test (WAIS-IV), Repeatable Battery for the Assessment of Neuropsychological Status (RBANS), and Trail Making Test (TMT), we performed principal components analysis and generated a correlation matrix. Results: TFLS subscales explained unique variance, independent of other measures. The Memory subscale was most distinct, and related strongest with RBANS memory (rs = .43−.45). Communication was strongly related to WAIS-IV and RBANS verbal scales (rs = .46−.52), while Money and Calculation was related to WAIS-IV verbal and working memory scaless (rs = .40−.56). Time was moderately related to WAIS-IV perceptual reasoning abilities (r = .38). Conclusion(s): The TFLS subscales are generally valid, although the Time subscale urges caution (i.e., significant variance accounted for by perception, not solely time awareness skills).