Showing papers by "Susan E. Embretson published in 1999"
TL;DR: This new, stroke-specific outcome measure is reliable, valid, and sensitive to change and more studies are required to evaluate the SIS in larger and more heterogeneous populations and to evaluates the feasibility and validity of proxy responses for the most severely impaired patients.
Abstract: Background and Purpose—To be useful for clinical research, an outcome measure must be feasible to administer and have sound psychometric attributes, including reliability, validity, and sensitivity to change. This study characterizes the psychometric properties of the Stroke Impact Scale (SIS) Version 2.0. Methods—Version 2.0 of the SIS is a self-report measure that includes 64 items and assesses 8 domains (strength, hand function, ADL/IADL, mobility, communication, emotion, memory and thinking, and participation). Subjects with mild and moderate strokes completed the SIS at 1 month (n=91), at 3 months (n=80), and at 6 months after stroke (n=69). Twenty-five subjects had a replicate administration of the SIS 1 week after the 3-month or 6-month test. We evaluated internal consistency and test-retest reliability. The validity of the SIS domains was examined by comparing the SIS to existing stroke measures and by comparing differences in SIS scores across Rankin scale levels. The mixed model procedure was us...
1,108 citations
01 Feb 1999
TL;DR: Hershberger as mentioned in this paper, S.E. Embretson, S.L. Hershberger, and R.W. Thorndike, IRT and Intelligence Testing: Past, Present, and Future.
Abstract: Contents: S.E. Embretson, S.L. Hershberger, Preface. S.E. Embretson, Issues in the Measurement of Cognitive Abilities. R.M. Thorndike, IRT and Intelligence Testing: Past, Present, and Future. M.H. Daniel, Behind the Scenes: Using New Measurement Methods on DAS and KAIT. B.D. Wright, Fundamental Measurement for Psychology. R.W. Woodcock, What Can Rasch-Based Scores Convey About a Person's Test Performance? G.A. Marcoulides, Generalizability Theory: Picking Up Where the Rasch IRT Model Leaves Off? S.L. Hershberger, Introduction to Personality Measurement. J.E. Exner, Jr., The Rorschach: Measurement Concepts and Issues of Validity. N.G. Waller, Searching for Structure in the MMPI. S.P. Reise, Personality Measurement Issues Viewed Through the Eyes of IRT. S.E. Embretson, S.L. Hershberger, Summary and Future of Psychometric Methods in Testing.
221 citations
TL;DR: Psychometric principles and models required for measurement from on-line item generation are examined and a new IRT model that includes the impact on item discrimination, as well as difficulty, is developed.
Abstract: On-line item generation is becoming increasingly feasible for many cognitive tests. Item generation seemingly conflicts with the well established principle of measuring persons from items with known psychometric properties. This paper examines psychometric principles and models required for measurement from on-line item generation. Three psychometric issues are elaborated for item generation. First, design principles to generate items are considered. A cognitive design system approach is elaborated and then illustrated with an application to a test of abstract reasoning. Second, psychometric models for calibrating generating principles, rather than specific items, are required. Existing item response theory (IRT) models are reviewed and a new IRT model that includes the impact on item discrimination, as well as difficulty, is developed. Third, the impact of item parameter uncertainty on person estimates is considered. Results from both fixed content and adaptive testing are presented.
137 citations