UNLABELLED Pain management outcomes assessment depends on valid measurement of pain. However, the validity of single-item scales, such as numeric or faces scales, with the assignment of ordinal numerical values to response scale categories, is questionable. The universal assumption that equal distances between response choices represent equal distances on the dimension being measured is essenti...

BACKGROUND Our objective was to evaluate the measurement properties of the Pain Stages of Change Questionnaire (PSOCQ) and its four subscales Precontemplation, Contemplation, Action and Maintenance. METHODS A total of 231 patients, median age 42 years, with chronic musculoskeletal pain responded to the 30 items in PSOCQ. Thresholds for item scores, and unidimensionality and invariance of the ...

Title of Document: THE MIXTURE DISTRIBUTION POLYTOMOUS RASCH MODEL USED TO ACCOUNT FOR RESPONSE STYLES ON RATING SCALES: A SIMULATION STUDY OF PARAMETER RECOVERY AND CLASSIFICATION ACCURACY Youngmi Cho, Doctor of Philosophy, 2013 Directed By: Professor Jeffrey R. Harring Professor George B. Macready Department of Human Development and Quantitative Methodology Response styles presented in rating...

Título: Validación de la adaptación española del School Attitude Assessment Survey-Revised mediante el modelo de Rasch multidimensional. Resumen: El School Attitude Assessment Survey-Revised (SAAS-R) fue desarrollado por McCoach y Siegle (2003b) y validado en España por Miñano, Castejón, y Gilar (2014) a través del Modelo Clásico de Test. El objetivo del presente estudio es validar el SAAS-R a ...

BACKGROUND The Oxford elbow score (OES) is a patient-rated, 12-item questionnaire that measures quality of life in relation to elbow disorders. This English questionnaire has been proven to be a reliable and valid instrument. Recently, the OES has been translated into Dutch and examined for its reliability, validity, and responsiveness in a group of Dutch patients with elbow pathology. The aim ...

OBJECTIVE To evaluate the construct validity of a new rating scale for self-reported impairments in persons with late effects of polio. DESIGN Psychometric analysis of data on self-perceived impairments in persons with prior polio. PARTICIPANTS Two hundred seventy-three persons with prior polio (119 men and 154 women; mean age, 63.5 years). METHOD Rasch analysis of a 13-item rating scale ...

PURPOSE To determine the psychometric validity of the National Eye Institute-Visual Function Questionnaire (NEI VFQ-25) and its subscale structure for use in people with low vision. METHODS Two hundred thirty-two participants completed the NEI VFQ-25. Rasch analysis was used to test the psychometric performance of the questionnaire and each subscale. Factor models were hypothesized and tested...