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[Psychometric analyses of occupational therapy assessment]
T Schochat1, S Voigt-Radloff, H W Heiss
1Universitätsklinikum Ulm, Institut für Arbeits, Sozial und Umweltmedizin, Ulm, Germany. thomas.schochat@medizin.uni-ulm.de
Gesundheitswesen (Bundesverband Der Arzte Des Offentlichen Gesundheitsdienstes (Germany))
|June 14, 2002
Summary
The Occupational Therapy Assessment (OTA) is a reliable and valid tool for measuring adult occupational therapy in German-speaking countries. It demonstrates high internal consistency, test-retest, and interrater reliability, proving effective in clinical practice.
Area of Science:
- Occupational therapy
- Psychometrics
- Health sciences
Background:
- Standardized assessments for adult occupational therapy are lacking in German-speaking regions.
- The Occupational Therapy Assessment (OTA) was developed to address this gap.
- Initial studies evaluated its acceptance, practicality, and impact on process quality.
Purpose of the Study:
- To rigorously evaluate the psychometric properties of the Occupational Therapy Assessment (OTA).
- To establish the reliability and validity of the OTA for use in clinical practice.
Main Methods:
- The OTA was administered by 76 occupational therapists to 833 adult patients across 44 institutions.
- Concurrent validity was assessed using the Mini Mental State Examination (MMSE), Funktionsfragebogen Hannover (FFbH-P), Beschwerdenliste (BL), and Indikatoren des Reha-Status (IRES).
- Reliability was further examined through interrater assessments (n=59) and test-retest evaluations (n=42).
Main Results:
- High internal consistency (Cronbach's alpha: 0.90-0.97) and excellent test-retest reliability (ICC: 0.93-0.99) were observed for key OTA domains.
- Strong interrater reliability (kappa: 0.72-0.82) was also demonstrated.
- Satisfactory concurrent validity with established instruments and sensitivity to change were confirmed.
Conclusions:
- The Occupational Therapy Assessment (OTA) is a psychometrically sound instrument for evaluating adult occupational therapy.
- It is reliable, valid, sensitive to change, and comprehensive, meeting the need for a standardized assessment in German-speaking countries.