title: Categorization and deductive reasoning: predictors of instrumental activities of daily living performance in adults with brain injury.
abstract: OBJECTIVE
  The purpose of this study was to examine the predictive relationship of categorization and deductive reasoning abilities to performance of instrumental activities of daily living (IADL) among adults with brain injury.
  
  
  METHODS
  A correlational research design was used to examine the performance of 19 patients from a neurosurgery acute care unit on Toglia's Category Assessment (TCA), the Deductive Reasoning test (DR), and the Observed Tasks of Daily Living-Revised.
  
  
  RESULTS
  Multiple regression analysis indicated that categorization and deductive reasoning accounted for a significant proportion of the variance in IADL performance scores, with deductive reasoning making the greater contribution. Demographic characteristics such as age and education reduced the power of the previous variables, especially of the categorization.
  
  
  CONCLUSIONS
  The results of this study indicate that assessments of categorization and deductive reasoning abilities of persons with brain injury may be good predictors of IADL functional performance. Results support the use of the TCA and DR as quick measures of a person's cognitive and functional abilities. Furthermore, this study provides preliminary results to support that categorization and deductive reasoning abilities are fundamental for the performance of IADL skills.
authors.affiliation: New York University, New York 10012, USA. yg243@nyu.edu
authors.forename: Yael
authors.initials: Y
authors.lastname: Goverover
authors.forename: Jim
authors.initials: J
authors.lastname: Hinojosa
mesh_terms: D000203:Activities of Daily Living; D000328:Adult; D000368:Aged; D001930:Brain Injuries / Q000175:diagnosis / Q000534:rehabilitation*; D003072:Cognition Disorders / Q000175:diagnosis / Q000534:rehabilitation*; D015331:Cohort Studies; D005260:Female; D006801:Humans; D008297:Male; D008606:Mental Processes / Q000502:physiology*; D008875:Middle Aged; D009483:Neuropsychological Tests; D011237:Predictive Value of Tests; D011379:Prognosis; D011930:Reaction Time / Q000502:physiology; D012494:Sampling Studies; D012680:Sensitivity and Specificity; D012720:Severity of Illness Index; D013647:Task Performance and Analysis