Social communication fears: Factor analysis and gender invariance of the short-form of the personal report of confidence as a speaker in Spain

• First study to assess psychometric properties of the short form of PRCS in Spain.
• Report good psychometric properties for the short form of the PRCS in Spain.
• Confirm factor structure of short form of PRCS with a six point rating scale.
• Show convergent validity with an instrument that assesses public speaking fear.
• Test measurement invariance across gender groups.

Public speaking is a highly prevalent fear that prevents from successful social communication. The Personal Report of Confidence as a Speaker (PRCS) is one of the most commonly used measures to assess people’s fear of public speaking. However, few studies have evaluated its factor structure. In this paper, two studies analyzed the psychometric properties of the short form of the PRCS (Hook, Smith, & Valentiner, 2008) and its convergent validity with the Self Statements During Public Speaking (SSPS) scale in Spain. Study 1 (N = 190) provided information about exploratory factor analysis and internal consistency. Study 2, with a different sample (N = 392), complemented Study 1 with confirmatory factor analysis, internal consistency, convergent validity with SSPS and test of measurement invariance across gender groups. Results of exploratory factor analysis yielded a one factor solution. Different indices of the confirmatory factor analysis (CFI, TLI, SRMR, RMSEA) confirmed a good fit. Internal consistency was high in both studies and convergent validity with SSPS was found. Evidence of configural, metric and scalar invariance across gender groups was obtained. These findings support the use of the short form of the PRCS and suggest that it is a useful instrument for public speaking assessment.