Abstract
Background: Based on the theory by Carver y Scheier, optimism is defined as a trait or disposition consisting of two dimensions, optimism and pessimism. This construct is widely studied for its association with quality of life and psychological well-being. In the Chilean context, this construct does not have a valid measure of children and youth. This paper offers, is offered an alternative for its evaluation in a wide range of ages through the measurement carried out by the fathers and mothers. Objective: For the analysis, reliability was reviewed for the total sample, by gender of parents, and by age group. Likewise, for confirmatory factor analysis, the adjustment indices commonly used in research practice were reviewed. This study aims to assess the factor structure of LOT-P on Chilean children and youth, as reported by parents. Results: Data obtained on a sample of 392 Chilean parents show a good fit with the two-dimensional structure proposed by Lemola et al. Additionally, results show metric invariance between mothers and fathers, s for different age types. Conclusions: Therefore, LOT-P shows psychometric properties suitable for assessing NNA optimism, as reported by parents. This investigation has some limitations related with a high educational and socioeconomic level of the participants, for example.
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