Generational Impulsivity Scale (GIS-20): Development and Psychometric Validation

Abstract

The purpose of this study was to develop and validate the Generational Impulsivity Scale (GIS-20), a 20-item instrument designed to assess levels of impulsivity across four generational cohorts (Baby Boomers, Generation X, Millennials, and Generation Z). A total of 550 adults participated in the validation study. Exploratory analyses indicated strong internal consistency (Cronbach’s alpha = .89), and split-half reliability (Guttman coefficient = .88). Criterion-related validity was demonstrated via a significant correlation (r = .74) with the Barratt Impulsiveness Scale (BIS-11). Generational norms were established for each cohort, supporting the scale’s sensitivity to variations in impulsivity across age groups. These findings suggest that the GIS-20 is a reliable and valid measure for research and clinical assessment of impulsivity.