Factorial and construct validity of the Italian Positive and Negative Affect Schedule (PANAS)

This study provides evidence that an Italian version of the Positive and Negative Affect Schedule (PANAS) is a reliable and valid self-report measure. In an Italian sample (N = 600), the PANAS showed solid psychometric properties, and several American findings with the PANAS were replicated. The replicability of the PANAS factor structure was confirmed by high congruence coefficients between the American and Italian varimax solutions. Alternative models were tested with Confirmatory Factor Analysis; as in previous studies, the two-factor model achieved the best fit, but absolute fit indices varied with the estimation methods used. The independence/bipolarity issue was also explored: Positive and negative affect scales remain substantially independent after accounting for measurement error and acquiescence. Some predictions from the tripartite model of anxiety and depression were confirmed, and external correlates of the PANAS replicated those found in other languages and cultures. These analyses offer strong support for the construct validity of the Italian PANAS.