Dispositional Optimism is Unidimensional or Bidimensional? the Portuguese Revised Life Orientation Test

作者:Pais Ribeiro Jose Luis; Pedro Luisa; Marques Susana
来源:Spanish Journal of Psychology, 2012, 15(3): 1259-1271.
DOI:10.5209/rev_SJOP.2012.v15.n3.39412

摘要

The aim of the study is to adapt and then discuss the appropriateness of the Life Orientation Test as a one or two dimension scale. The research includes two studies; one is composed of a sequential sample of 280 people with multiple sclerosis, 71% female, and another includes a convenience sample of 615 individuals from the community, 51.1% female. Because the construct is built upon a theoretical assumption that has one dimension, we examine the hypothesis of one or two factor solutions through confirmatory factor analysis, and the two-dimension solution premise demonstrates better adjustment for both samples. The other psychometric properties explored show appropriate results for the Portuguese sample, and similar to the original ones; the Test therefore seems appropriate for use in cross cultural studies. Based on our results, we discuss whether the questionnaire is a one or two dimension instrument, concluding that it appears appropriate to accept the recommendations of the original authors to use it as a one-dimensional tool and, when necessary, to use both dimensions.

  • 出版日期2012-11