Abstract

Sex fantasies play an important role in human sexuality, making clear the need to assess instruments with enough psychometric guarantees., Reliability and validity of Wilson's Sex Fantasy Questionnaire were assessed in a Spanish population. The scale includes four fantasy factors: exploratory, intimate,. impersonal, and sadomasoquistic, and was administered, along with LoPiccolo and Steger's Sexual Interaction Inventory, to a sample of 460 subjects (370 women and 90 men). The internal consistency analysis provided a Cronbach's alpha of 90 for the total scale; values for the four subscales ranged from .66 to .79, the impersonal sex fantasy category showing the smallest homogeneity. Factor analysis only partially supported the scale's original structure and identified impersonal and sadomasoquistic factors as problematic. Nevertheless, the scale showed an adequate convergent validity with the scores in desired sexual behavior obtained with LoPiccolo and Steger's inventory, and significant differences were shown in the type of sex fantasies between men and women and between individuals with or without, a partner. Findings indicate this is a useful instrument to study human sexuality.