Examination of the factor structure of the disabilities of the arm, shoulder, and hand questionnaire / Leigh A. LEHMAN in American Journal of Occupational Therapy, Vol. 65/2 (mars-avril 2011)

Public ISBD [article]  inAmerican Journal of Occupational Therapy > Vol. 65/2 (mars-avril 2011) . - p. 169-178 Titre : Examination of the factor structure of the disabilities of the arm, shoulder, and hand questionnaire Type de document : texte imprimé Auteurs : Leigh A. LEHMAN ; Michelle WOODBURY ; Craig A. VELOZO Année de publication : 2011 Article en page(s) : p. 169-178 Langues : Anglais (eng) Mots-clés : Evaluation  Handicap Résumé : OBJECTIVE. The Disabilities of the Arm, Shoulder, and Hand (DASH) questionnaire is a global scale evaluating the impact of upper-extremity disorders. We sought to validate or challenge the unidimensional factor structure of the DASH. METHOD. Secondary analysis was performed on data collected from outpatient clinics. Factor analysis was performed in two steps, exploratory factor analysis (EFA) followed by confirmatory factor analysis (CFA). To provide further support for unidimensionality, fit statistics were calculated using the Andrich Rasch rating-scale model. RESULTS. EFA revealed three potential factors (eigenvalues = 18.40, 1.56, and 1.54). CFA was performed fitting a three-factor model. Tucker-Lewis Index (.99) and standardized root mean square residual (.05) values indicated good fit. Comparative fit index (.89) and root mean square error of approximation (.13) did not. When divided into three constructs, only one item misfit. CONCLUSION. More research is needed to determine situations in which division of the DASH may enhance interpretability. Permalink : ./index.php?lvl=notice_display&id=14099 [article] Examination of the factor structure of the disabilities of the arm, shoulder, and hand questionnaire [texte imprimé] / Leigh A. LEHMAN ; Michelle WOODBURY ; Craig A. VELOZO . - 2011 . - p. 169-178. Langues : Anglais (eng) in American Journal of Occupational Therapy > Vol. 65/2 (mars-avril 2011) . - p. 169-178 Mots-clés : Evaluation  Handicap Résumé : OBJECTIVE. The Disabilities of the Arm, Shoulder, and Hand (DASH) questionnaire is a global scale evaluating the impact of upper-extremity disorders. We sought to validate or challenge the unidimensional factor structure of the DASH. METHOD. Secondary analysis was performed on data collected from outpatient clinics. Factor analysis was performed in two steps, exploratory factor analysis (EFA) followed by confirmatory factor analysis (CFA). To provide further support for unidimensionality, fit statistics were calculated using the Andrich Rasch rating-scale model. RESULTS. EFA revealed three potential factors (eigenvalues = 18.40, 1.56, and 1.54). CFA was performed fitting a three-factor model. Tucker-Lewis Index (.99) and standardized root mean square residual (.05) values indicated good fit. Comparative fit index (.89) and root mean square error of approximation (.13) did not. When divided into three constructs, only one item misfit. CONCLUSION. More research is needed to determine situations in which division of the DASH may enhance interpretability. Permalink : ./index.php?lvl=notice_display&id=14099

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Psychometrics of the self-report safe driving behavior measure for older adults / Sherrilene Classen in American Journal of Occupational Therapy, Vol. 66/2 (mars-avril 2012)

Public ISBD [article]  inAmerican Journal of Occupational Therapy > Vol. 66/2 (mars-avril 2012) . - p. 233-241 Titre : Psychometrics of the self-report safe driving behavior measure for older adults Type de document : texte imprimé Auteurs : Sherrilene Classen ; et al. ; Craig A. VELOZO ; Pey-Shan WEN Année de publication : 2012 Article en page(s) : p. 233-241 Langues : Anglais (eng) Mots-clés : Psychométrie  Personne âgée  Conduite automobile  Autoévaluation  Sécurité Résumé : We investigated the psychometric properties of the 68-item Safe Driving Behavior Measure (SDBM) with 80 older drivers, 80 caregivers, and 2 evaluators from two sites. Using Rasch analysis, we examined unidimensionality and local dependence; rating scale; item- and person-level psychometrics; and item hierarchy of older drivers, caregivers, and driving evaluators who had completed the SDBM. The evidence suggested the SDBM is unidimensional, but pairs of items showed local dependency. Across the three rater groups, the data showed good person (≥3.4) and item (≥3.6) separation as well as good person (≥.93) and item reliability (≥.92). Cronbach’s α was ≥.96, and few items were misfitting. Some of the items did not follow the hypothesized order of item difficulty. The SDBM classified the older drivers into six ability levels, but to fully calibrate the instrument it must be refined in terms of its items (e.g., item exclusion) and then tested among participants of lesser ability. Permalink : ./index.php?lvl=notice_display&id=14204 [article] Psychometrics of the self-report safe driving behavior measure for older adults [texte imprimé] / Sherrilene Classen ; et al. ; Craig A. VELOZO ; Pey-Shan WEN . - 2012 . - p. 233-241. Langues : Anglais (eng) in American Journal of Occupational Therapy > Vol. 66/2 (mars-avril 2012) . - p. 233-241 Mots-clés : Psychométrie  Personne âgée  Conduite automobile  Autoévaluation  Sécurité Résumé : We investigated the psychometric properties of the 68-item Safe Driving Behavior Measure (SDBM) with 80 older drivers, 80 caregivers, and 2 evaluators from two sites. Using Rasch analysis, we examined unidimensionality and local dependence; rating scale; item- and person-level psychometrics; and item hierarchy of older drivers, caregivers, and driving evaluators who had completed the SDBM. The evidence suggested the SDBM is unidimensional, but pairs of items showed local dependency. Across the three rater groups, the data showed good person (≥3.4) and item (≥3.6) separation as well as good person (≥.93) and item reliability (≥.92). Cronbach’s α was ≥.96, and few items were misfitting. Some of the items did not follow the hypothesized order of item difficulty. The SDBM classified the older drivers into six ability levels, but to fully calibrate the instrument it must be refined in terms of its items (e.g., item exclusion) and then tested among participants of lesser ability. Permalink : ./index.php?lvl=notice_display&id=14204

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Rater reliability and rater effects of the safe driving behavior measure / Sherrilene Classen in American Journal of Occupational Therapy, Vol. 66/1 (janvier-février 2012)

Public ISBD [article]  inAmerican Journal of Occupational Therapy > Vol. 66/1 (janvier-février 2012) . - p. 69-77 Titre : Rater reliability and rater effects of the safe driving behavior measure Type de document : texte imprimé Auteurs : Sherrilene Classen ; et al. ; Craig A. VELOZO ; Pey-Shan WEN Année de publication : 2012 Article en page(s) : p. 69-77 Langues : Anglais (eng) Mots-clés : Sécurité routière  Conduite automobile  Comportement Résumé : We used the Safe Driving Behavior Measure (SDBM) to determine rater reliability and rater effects (erratic responses, severity, leniency) in three rater groups: 80 older drivers (mean age = 73.26, standard deviation = 5.30), 80 family members or caregivers (age range = 20–85 yr), and two driving evaluators. Rater agreement was significant only between the evaluators and the family members or caregivers. Participants rated driving ability without erratic effects. We observed an overall rater effect only between the evaluator and family members or caregivers, with the evaluators being the more severe rater group. Training family members or caregivers to rate driving behaviors more consistently with the evaluator’s ratings may enhance the SDBM’s usability and provide a role for occupational therapists to interpret proxy reports as an entry point for logical and efficient driving safety interventions. Permalink : ./index.php?lvl=notice_display&id=14210 [article] Rater reliability and rater effects of the safe driving behavior measure [texte imprimé] / Sherrilene Classen ; et al. ; Craig A. VELOZO ; Pey-Shan WEN . - 2012 . - p. 69-77. Langues : Anglais (eng) in American Journal of Occupational Therapy > Vol. 66/1 (janvier-février 2012) . - p. 69-77 Mots-clés : Sécurité routière  Conduite automobile  Comportement Résumé : We used the Safe Driving Behavior Measure (SDBM) to determine rater reliability and rater effects (erratic responses, severity, leniency) in three rater groups: 80 older drivers (mean age = 73.26, standard deviation = 5.30), 80 family members or caregivers (age range = 20–85 yr), and two driving evaluators. Rater agreement was significant only between the evaluators and the family members or caregivers. Participants rated driving ability without erratic effects. We observed an overall rater effect only between the evaluator and family members or caregivers, with the evaluators being the more severe rater group. Training family members or caregivers to rate driving behaviors more consistently with the evaluator’s ratings may enhance the SDBM’s usability and provide a role for occupational therapists to interpret proxy reports as an entry point for logical and efficient driving safety interventions. Permalink : ./index.php?lvl=notice_display&id=14210

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