Print Email Facebook Twitter Measuring disability, the agreement between self evaluation and observation of performance Title Measuring disability, the agreement between self evaluation and observation of performance Author Wijlhuizen, G.J. Ooijendijk, W. Publication year 1999 Abstract Purpose: In 1981, eight countries and the World Health Organization (WHO) reached consensus about applying a similar disability questionnaire in their health surveys that was related to the ICIDH. In 1992 a revised version, the WHO-disability questionnaire, was recommended. In this paper the concurrent validity of 10 items of the questionnaire is evaluated by measuring the agreement with observed performance of corresponding tasks. Method: The disability questionnaire was sent to 750 subjects. From the respondents (468) 93 were selected, based on their reported disability, and 10 performance tasks were observed. The agreement was measured for individual items and for all items together in distinguishing between persons with no, or at least one disability. Results: A low to moderate agreement was found between self reported and observed disability. In general, observation resulted in lower disability ratings. Among 24% of those who reported at least one disability, no disability was observed. Persons among whom at least one disability was observed, only 2% (n = 1) reported no disability in the questionnaire. Conclusions: Although the concurrent validity is low to moderate between the results of the WHO-disability questionnaire and observation, the questionnaire is highly sensitive for detecting persons with at least one disability. The specificity of the questionnaire must be increased by additional questions. Subject WorkplaceArbeidsongeschiktheidWereldgezondheidsorganisatieWHOUNESCOLichamelijk gehandicaptenInvalidenStatistisch onderzoekMetingenMeetmethodenAdultDisabilityHalth surveyMajor clinical studyObservationQuestionnaireSelf evaluationSelf reportTask performanceWorld health organizationActivities of Daily LivingAgedDisability EvaluationDisabled PersonsFemaleHumansMaleReproducibility of ResultsSensitivity and Specificity To reference this document use: http://resolver.tudelft.nl/uuid:6a1136ee-f153-494e-b26f-dcbf27f8555b DOI https://doi.org/10.1080/096382899297981 TNO identifier 438392 Source Disability and rehabilitation, 21 (2), 61-67 Document type article Files To receive the publication files, please send an e-mail request to TNO Library.