Item Development and Validity Testing for a Self- and Proxy Report: The Safe Driving Behavior Measure

Classen, Sherrilene; Winter, Sandra M.; Velozo, Craig A.; Bédard, Michel; Lanford, Desiree N.; Brumback, Babette; Lutz, Barbara J.

doi:10.5014/ajot.64.2.296

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Research Article| Online March 01 2010

Item Development and Validity Testing for a Self- and Proxy Report: The Safe Driving Behavior Measure

Sherrilene Classen;

Sherrilene Classen

Sherrilene Classen, PhD, MPH, OTR/L, is Assistant Professor, Department of Occupational Therapy, College of Public Health and Health Professions; Adjunct Assistant Professor, Department of Epidemiology and Biostatistics; Affiliate Assistant Professor, Department of Behavioral Science and Community Health, College of Public Health and Health Professions; and Director of the Institute for Mobility, Activity and Participation and the National Older Driver Research and Training Center, University of Florida. Address correspondence to Sherrilene Classen, PO Box 100164, Gainesville, FL 32611-0164; [email protected]

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Sandra M. Winter;

Sandra M. Winter

Sandra M. Winter, PhD, OTR/L, is Postdoctoral Associate, College of Public Health and Health Professions, University of Florida, Gainesville, and National Older Driver Research and Training Center, College of Public Health and Health Professions, University of Florida, Gainesville

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Craig A. Velozo;

Craig A. Velozo

Craig A. Velozo, PhD, OTR/L, is Professor and Associate Chair, Department of Occupational Therapy, College of Public Health and Health Professions, University of Florida, Gainesville, and Rehabilitation Science Doctoral Program, College of Public Health and Health Professions, University of Florida, Gainesville

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Michel Bédard;

Michel Bédard

Michel Bédard, PhD, is Director, Centre for Research on Safe Driving and Director/Associate Professor in the Master of Public Health Program, Lakehead University, Thunder Bay, Ontario

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Desiree N. Lanford;

Desiree N. Lanford

Desiree N. Lanford, MOT, OTR/L, CDRS, is Coordinator of Driver Rehabilitation, Department of Occupational Therapy, College of Public Health and Health Professions, University of Florida, Gainesville, and National Older Driver Research and Training Center, College of Public Health and Health Professions, University of Florida, Gainesville

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Babette Brumback;

Babette Brumback

Babette Brumback, PhD, is Associate Professor, Department of Epidemiology and Biostatistics, College of Public Health and Health Professions, University of Florida, Gainesville

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Barbara J. Lutz

Barbara J. Lutz, RN, PhD, CRRN, is Assistant Professor, Department of Health Care Environments and Systems, College of Nursing, University of Florida, Gainesville

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Author & Article Information

Online ISSN: 1943-7676

Print ISSN: 0272-9490

2010

The American Journal of Occupational Therapy, 2010, Vol. 64(2), 296–305.

https://doi.org/10.5014/ajot.64.2.296

Abstract

OBJECTIVE. We report on item development and validity testing of a self-report older adult safe driving behaviors measure (SDBM).

METHOD. On the basis of theoretical frameworks (Precede–Proceed Model of Health Promotion, Haddon’s matrix, and Michon’s model), existing driving measures, and previous research and guided by measurement theory, we developed items capturing safe driving behavior. Item development was further informed by focus groups. We established face validity using peer reviewers and content validity using expert raters.

RESULTS. Peer review indicated acceptable face validity. Initial expert rater review yielded a scale content validity index (CVI) rating of 0.78, with 44 of 60 items rated ≥0.75. Sixteen unacceptable items (≤0.5) required major revision or deletion. The next CVI scale average was 0.84, indicating acceptable content validity.

CONCLUSION. The SDBM has relevance as a self-report to rate older drivers. Future pilot testing of the SDBM comparing results with on-road testing will define criterion validity.

2010

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Item Development and Validity Testing for a Self- and Proxy Report: The Safe Driving Behavior Measure

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