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Mannarini, S., Polimeni, S., Shams, M., & Giacobbo, M.

Assessing Negative and Positive Mood States: The identification of a short form of the POMS scale in Italian oncology outpatients

In line with the interest in constructing brief questionnaires to be used in clinical settings, in this research a short form of the Italian version of the 65-item Profile of Mood States scale (POMS; McNair, Lorr, & Droppleman, 1971/1981; Italian version: Farnè, Sebellico, Gnugnoli, & Corallo, 1991) was developed for oncology patients, by analyzing the responses of 108 cancer suffers. In Study 1, by means of a Principal Component Factor Analysis, a 50-item two-factor structure was obtained, called Negative (40 items) and Positive (10 items) Mood States (NPMS) scale. Both factors showed internal consistency and correlation with external variables. In Study 2, in a latent trait perspective, an Item Response Theory analysis was applied. The previous factors were confirmed and reduced to seven and six items, respectively. The new 13 item-scale was named Negative and Positive Mood State Short Form (NPMS-SF).

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