Validação da escala Perfil do Estilo de Vida Individual / Validation of the Individual Lifestyle Profile scale

RESUMO

O objetivo desta investigação foi analisar a validade de construto da escala Perfil do Estilo e Vida Individual (PEVI). Participaram da amostra 1606 professores de Educacao Fisica que atuam no magisterio publico estadual dos estados da regiao Sul do Brasil. Na analise estatistica, utilizou-se a analise fatorial, com rotacao varimax, e adotou-se o criterio de Kaiser para determinar o numero de fatores necessarios do instrumento, o alfa de Cronbach para verifi car a consistencia interna da escala e a correlacao de Spearman para avaliar o nivel de associacao entre as questoes. Os testes estatisticos foram realizados nos pacotes estatisticos Statistica 7.0 e SPSS 11.0, sendo adotado o nivel de significancia de 5%. Os resultados da analise fatorial, quando considerados os cinco fatores, apresentaram a mesma distribuicao das questoes contempladas na proposta original desta escala, sendo que o total da variancia explicada do instrumento foi de 58,65%. Em relacao a sua consistencia interna, encontrou-se um coefi ciente alfa de Cronbach de 0,78, considerado razoavel para avaliacao geral do instrumento. Quanto ao nivel de associacao entre as questoes, apenas em quatro situacoes encontrou-se moderada correlacao (rs entre 0,45 e 0,57). As evidencias encontradas confi rmam que o instrumento apresenta adequada consistencia interna, que as questoes estao associadas aos respectivos componentes, assim como abordam diferentes indicadores das dimensoes investigadas. Assim, conclui-se que o PEVI apresenta medidas psicometricas confiaveis para avaliar o estilo de vida de pessoas que apresentam caracteristicas semelhantes aos participantes deste estudo.

ABSTRACT

This study is aimed at evaluating the construct validity of the Individual Lifestyle Profi le (PEVI) scale. Physical Education teachers (n=1606) working in Public Schools of the Southern region of Brazil participated in the study. Statistical analysis included factor analyses using varimax rotation, in order to determine the necessary number of factors of the instrument used the Kaiser criterion. Cronbachïs Alpha estimates of internal consistency were calculated, and Spearmans correlation was used to evaluate the degree of association (overlapping) among the individual items. Analyses were performed using the Statistica 7.0 and SPSS 11.0 softwares, with 5% level of significance. Factor analyses, when considering five factors, suggested the same distribution of items in the original proposal of this scale, whereas 58.65% of the total variance was explained by the instrument dimensions. In relation to its internal reliability, a Cronbachs Alpha coefficient of 0.78 was calculated, which is considered reasonable for the general evaluation of the instrument. Overlapping of items (Spearmans coefficients) was moderate for only four items (r between 0.45 and 0.57). Evidence found has confi rmed that the instrument presents adequate internal reliability, the items are associated to the respective dimensions, and it approaches different indicators of the studied dimensions. It was concluded that the Individual Lifestyle Scale (PEVI) presents internal consistency and construct validity to evaluate the lifestyle of individuals with similar characteristics to the participants in this study.