Less is not always more: The case of the 36-item short form of the Zimbardo Time Perspective Inventory. (January 2015)

• Record Type: Journal Article
• Authors: McKay, Michael T.; Worrell, Frank C.; Temple, Elizabeth C.; Perry, John L.; Cole, Jon C.; Mello, Zena R.
• Is Part Of: Personality and individual differences. Volume 72(2015)
• Page Start: 68
• Page End: 71
• Publication Date: 2015-01
• Subjects: Confirmatory factor analysis -- Exploratory structural equation modeling -- Zimbardo Time Perspective Inventory; Personality -- Periodicals; Individuality -- Periodicals; Individuality -- Periodicals; Personality Development -- Periodicals; Personnalité -- Périodiques; Individualité -- Périodiques; 155.205
• DOI: 10.1016/j.paid.2014.08.018
• Languages: English
• ISSNs: 0191-8869

Abstract

Highlights: The ZTPI-36 was developed from data in 24 countries. This study examined its reliability and validity in three countries. Results provided support for the internal consistency of ZPTI-36. Structural validity analyses indicated poor fit and numerous problematic items. Fit improved using exploratory structural equation modeling. Abstract: Recently, a shortened version of the Zimbardo Time Perspective Inventory (ZPTI; Zimbardo & Boyd, 1999) was proposed as a "gold standard" (Sircova et al., 2014, p. 9). In this study, we examined the internal consistency and structural validity of this version of the ZPTI in samples of adolescents from the United Kingdom ( N = 913) and the United States ( N = 815), and adults from Australia ( N = 667). Results provided support for the internal consistency of ZPTI scores, but structural validity analyses indicated poor fit and numerous problematic items. The findings call into question the use of scores on this shortened version of the ZTPI.