J Dent Educ. 69(3): 363-370 2005
© 2005 American Dental Education Association
Critical Issues in Dental Education |
Predictive Validity of Dental Hygiene Competency Assessment Measures on One-Shot Clinical Licensure Examinations
Cynthia C. Gadbury-Amyot, B.S.D.H., Ed.D.;
Kimberly Krust Bray, R.D.H., M.S.;
Bonnie Sue Branson, R.D.H., Ph.D.;
Lorie Holt, R.D.H., M.S.;
Nancy Keselyak, R.D.H., M.S.;
Tanya Villalpando Mitchell, R.D.H., M.S.;
Karen B. Williams, R.D.H., Ph.D.
Dr. Amyot is Professor and Director; Prof. Bray is Professor and Director, Graduate and Degree Completion; Dr. Branson is Associate Professor; Prof. Holt is Associate Professor; Prof. Keselyak is Assistant Professor; Prof. Mitchell is Assistant Professor, all in the Division of Dental Hygiene, and Dr. Williams is Professor, Department of Dental Public Health and Behavioral Sciences—all at the University of Missouri-Kansas City School of Dentistry. Direct correspondence and requests for reprints to Dr. Cynthia C. Gadbury-Amyot, Professor and Director, Division of Dental Hygiene, School of Dentistry, University of Missouri-Kansas City, 650 E. 25th Street, Kansas City, MO 64108; 816-235-2050 phone; 816-235-2157 fax; amyotc{at}umkc.edu.
Key words: competency, validity, portfolio assessment of student competency
Submitted for publication 09/15/04;
accepted 12/17/04
The purpose of this study was to examine the predictive validity of traditional and nontraditional dental hygiene competency assessment measures on one-shot clinical licensure examinations in a baccalaureate dental hygiene program. Traditional assessment data including overall grade point average (GPA), Clinical GPA, National Board Dental Hygiene Examination (NBDHE) scores, and Central Regional Dental Testing Service (CRDTS) scores along with nontraditional assessment data in the form of Portfolio scores were collected from seventy-four students. Factor analysis and subsequent linear regression modeling were used to explore the ability of four variables (Overall GPA, NBDHE, Portfolios, and Clinical GPA) to predict one-shot clinical licensure examination (CRDTS) scores. A two-factor solution was obtained with one factor defined as dental hygiene cognition and the second factor defined as dental hygiene clinical performance. Factor scores were subsequently used in a linear predictive model to assess the shared and unique contribution of factors to the one-shot clinical licensure examination score. The shared contribution of both factors only accounted for 13.9 percent of variance in the outcome measure of one-shot clinical licensure examination scores. The lack of concordance between previously validated measures of dental hygiene student competency or predictors of student success (Overall GPA, NBDHE, and Portfolios) and a one-shot clinical licensure examination (CRDTS) raises serious concern about the validity of our current dental hygiene licensing procedure which uses the CRDTS clinical examination to make decisions about granting licenses to practice.
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Copyright © 2005 by the American Dental Education Association.
