Construção e validação de uma escala de medida da imagem corporal

• Autor(a) principal: Souto, Cláudia Maria Ramos Medeiros
• Data de Publicação: 1999
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UFPB
• Texto Completo: https://repositorio.ufpb.br/jspui/handle/123456789/11980
• topic: Enfermagem - Métodos psicométricos; Imagem corporal; Validação de escala; CNPQ::CIENCIAS DA SAUDE::ENFERMAGEM

The purpose of this methodological study was to construct and to test the validity and reliability of a body image rating scale. Four steps were developed in the realization of this study: 1) construction of the scale items; 2) content validity analysis of the items; 3) analysis of reliability; 4) construct validity (internal consistency and dimensionality of the measure through principal components analysis). The three components or dimensions of body image - body reality, body ideal and body presentation, described by Price (1990a; 1990b), provided the theoretical orientation for formulating the items in the scale. An initial listing of the items were submitted to seven judges for evaluation of content validity. Those items with na index of agreement of < 0.80 were excluded. For analysis of reliability the test-retest method was employed and the original version of the test was administered to 24 subjects with a two-week interval between the two applications. An r= 0.71 was obtained for the scores of the respondents in the test-retest situation, with na a= 0.84 of the total of 39 items, indicating that the measures was stable and presented a good internal consistency. Following this, the scale was applied to 375 subjects, completing the construction of the measure with an analysis of construct validity in which two analytical procedures were employed was conducted: 1) evaluation of the internal consistency between each item and the total scale was measured through Pearson's r, and the contribution of each specific item, through Crombach s a. 2) analysis of the dimensionality of the measure, of an exploratory nature, in which was employed the principal components analysis method. After these procedures, the final version of the measure resulted of 23 items, of which 7 ( 30.4%) addressed the component of body reality, 11 ( 47.8%) addressed the component of body ideal, and 5 ( 21.7%) were related to body presentation. The scale evidenced an adequate final index of internal consistency (a=0.91), showing it to be a reliable instrument for the diagnosis of alterations in body image. Although the instrument has evidenced a good index of internal consistency, one must consider that the scale need to be tested in various populations to confirm its clinical validity.