Psicometria

Abstract

PsychometricsPasquali L Psychometrics PSICOMETRIA PSICOMETRÍA RESUMO A psicometria fundamenta-se na teoria da medida em ciências para explicar o sentido que têm as respostas dadas pelos sujeitos a uma série de tarefas e propor técnicas de medida dos processos mentais. Neste artigo são apresentados os conceitos e modelos da psicometria moderna e discutidos os parâmetros de validade e precisão dos testes. DESCRITORES ABSTRACTPsychometrics has foundations on the theory of measurement in Sciences and is aimed at explaining the meaning of responses provided by subjects submitted to a series of tasks, and proposing techniques for the measurement of mental processes. This article presents concepts and models of modern psychometrics and discusses the validity and reliability parameters of the applied tests. KEY WORDS RESUMENLa Psicometría se fundamenta en la teoría de la medida en las ciencias buscando explicar el sentido en las respuestas de los que fueron sujetos a una serie de tareas, además de proponerse técnicas de medida de sus procesos mentales. En este artículo son presentados los conceptos y modelos de psicometría moderna, así como son discutidos los parámetros de validez y precisión de los testes. DESCRIPTORES

Evaluation of the Primary Care in leprosy control: proposal of an instrument for users

“…This step was essential to assess the adequacy of the response card, reduce the number of items in the instrument, and improve understanding of questions. Thus, the first stage of the test validation was obtained, because the items remaining in the instrument were considered relevant to represent the latent trait (17) that in this case, is the performance of PHC in carrying out leprosy control actions.…”

“…A sample five times greater than the number of items to be evaluated would be necessary to evaluate the validity and accuracy of the instrument (18) . However, the results of the test-retest reliability, which are also a measure of reliability of a test, showed that the instrument for the leprosy patients is precise and measured identical scores of the same respondents in two different moments in time (17)(18) . Thus, the instrument showed here has the characteristic of measuring without mistakes, and to evaluate this accuracy was chosen the same methodology used in the validation of the PCATool-Braszil, adult version (11) .…”

“…This resource was also used for presenting the professional version of the PCATool-Brazil that although still had its validation process in progress, was also recommended for mirror use in the version for adult users (10) . The authors design the application of the instrument in patients undergoing treatment of leprosy in the municipalities of the metropolitan Region of Belo Horizonte to examine the validity and accuracy by the methodology of the Classical Test Theory, which aims to produce quality tests (17) .…”

Analysis of variables that are not directly observable: influence on decision-making during the research process

“…Reliability of the scales require construct measures in a consistent and reproducible way, subjects with the same characteristics, or same subjects at equivalent moments present the same value of measurement. To validate the scale implies that scale measurement is what was intended to be measured (5,7,26) .…”

Use of patients’ classification instruments: analysis of the brazilian production of knowledge

“…To become reliable, psychometric measure is conditional to validation. Validating an instrument requires the study of two main features: the validity and reliability (42) . The validity consists in knowing whether the instrument actually measures what it proposes, while reliability refers to the degree of accuracy, in other words, how their results precisely reflect the actual measurements of the attribute investigated (43) .…”