Efforts to relate neuropsychological performance to real-world task functioning have predominantly yielded lackluster results, typically with neuropsychological performance accounting for modest amounts of variance in function. Nonetheless, the ecological validity of neuropsychological measures for predicting functional abilities remains a strong research interest and clinical necessity. This study relates neuropsychological performance to performance on a standardized cooking task (Rabideau Kitchen Evaluation-Revised; RKE-R) in persons with stroke. Results showed that while the composite score of mean neuropsychological performance had the largest association with meal preparation, several neuropsychological measures were significantly related to the RKE-R. Groups of left and right hemisphere stroke patients were not significantly different in terms of RKE-R performance. These results suggest that functional cooking task performance is related to intact cognitive abilities in delayed verbal memory, simple auditory attention, and visuospatial skills, as well as overall cognitive performance. Implications for neuropsychologists are discussed.
KeywordsEcological validity; predictive validity; neuropsychological assessment; cerebrovascular accidents; activities of daily living; cooking Historically, neuropsychological tests were largely used to establish diagnosis, but in recent years there has been a growing interest in understanding how neuropsychological test performance relates to everyday functioning (Ruff, 2003). For example, neuropsychologists are sometimes called upon to make inferences about their patient's ability to complete instrumental activities of daily living (IADLs) such as driving, shopping, and preparing meals. This use of neuropsychological testing is based on the assumption of a relationship between cognition and functional activities, and the need for an efficient way to estimate whether problems can be anticipated on in-vivo functional tasks based on cognitive abilities.The generalizability of traditional neuropsychological tests to these real-world behaviors, sometimes referred to as ecological validity, has become a point of increased scientific interest (Chaytor & Schmitter-Edgecombe, 2003). The vast majority of this research has attempted to determine the predictive value of commonly used neuropsychological instruments on NIH Public Access (Higginson, Arnett, & Voss, 2000), need for supervision (Hanks et al., 2008), return to work (Kibby, Schmitter-Edgecombe, & Long, 1998), and completion of IADLs (Farias, Harrell, Neumann, & Houtz, 2003;Farmer & Eakman, 1995), including managing finances (Okonkwo, Wadley, Griffith, Ball, & Marson, 2006). In a review of the neuropsychological correlates of driving ability, Withaar, Brouwer, and van Zomeren (2000) concluded that cognitive impairments are associated with driving difficulties, but the predictive value of individual neuropsychological tests is very limited as the demands of novel paper-and-pencil tests and performing complex, but wel...