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Abstract
The Cognitive Performance Test (CPT) was developed from the Cognitive Disability Model. The test is an evaluation tool based upon observation of the individual while he/she carries out standardized ADL and IADL tasks. The objective of this study was to determine the reliability (inter-rater reliability and internal consistency) and validity (concurrent and construct) of the CPT in Israel as an assessment tool to evaluate cognitive performance level in clients with dementia. Subjects included 30 elderly with dementia, and a control group of 30 healthy independent elderly matched for age and gender. Instruments included the Mini Mental Status Examination (MMSE) for screening, to differentiate between research and control groups. The Routine Task Inventory (RTI-II) was used as the criterion for concurrent validity. Results showed the CPT to be valid and reliable. High inter-rater reliability and internal consistency reliability were demonstrated. Concurrent validity was established by high correlations of the CPT and RTI-II therapist and moderate high with RTI-II care-giver, in both research and control groups. Significant high correlations were also found between the CPT and MMSE in both groups. Construct validity was determined by significant differences between the cognitive functional levels of the research and control groups, as demonstrated by their CPT and RTI-II scores. Further development and updating of the CPT test is recommended, as well as additional research to support the current findings.
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Notes on contributors
Chait Bar-Yosef
Jennifer R. Johnson was a graduate student in the School of Occupational Therapy, Texas Woman's University, Houston, TX at the time of this study. She is currently employed as an Occupational Therapist at Touro Infirmary in New Orleans, LA
Debra Stewart is Lecturer, School of Rehabilitation Science, McMaster University and staff therapist at Erinoak Centre, Missis-sauga, Ontario. She is currently completing a MSc (Design, Measurement and Evaluation) at McMaster University.
Ronald L. Mace (deceased, June 29, 1998) was also affiliated with The Center for Universal Design, School of Design, North Carolina University.
Lois Rosage and Geraldine Shaw are Occupational Therapist Consultants who provide evaluations for the housing programs at the Philadelphia Corporation for Aging.