Change in intraindividual variability over time as a key metric for defining performance-based cognitive fatigability.

ABSTRACT: Cognitive fatigability is conventionally quantified as the increase over time in either mean reaction time (RT) or error rate from two or more time periods during sustained performance of a prolonged cognitive task. There is evidence indicating that these mean performance measures may not sufficiently reflect the response characteristics of cognitive fatigue. We hypothesized that changes in intraindividual variability over time would be a more sensitive and ecologically meaningful metric for investigations of fatigability of cognitive performance. To test the hypothesis fifteen young adults were recruited. Trait fatigue perceptions in various domains were assessed with the Multidimensional Fatigue Index (MFI). Behavioral data were then recorded during performance of a three-hour continuous

SUBMITTER: Wang C 

PROVIDER: S-EPMC3980793 | biostudies-literature | 2014 Mar

REPOSITORIES: biostudies-literature