Measuring Strong, Skillful, Good and Transpersonal Will: The development of the Multidimensional Will Scale.

Abstract

Background and objectiveThis cross-sectional study aimed to provide a scale to assess different aspects of the will based on Roberto Assagioli's theory.Methods and resultsThe scale development followed three steps. Step 1 focused on operationalizing the construct and developing the items. It was carried out through several phases of item generation and refinement, resulting in a pool of 38 items. At Step 2 we tested the psychometric properties of the initial 38-item scale with the goal of excluding the items that weakened the structural validity and reliability of the scale. Descriptive, internal consistency, and exploratory factor analyses statistics were computed on a large sample (Sample 1: N = 587; age: M = 21.55, SD = 4.14, 66% female) and they led to a five-dimension model (Strong, Skillful, Good toward Self and Other, and Transpersonal Will) and the exclusion of 15 items. Analyses conducted at Step 3 on a different sample (Sample 2: N = 683; age: M = 34.09, SD = 16.27, 54% female) allowed for further refinement of the scale. Confirmatory factor analysis conducted on the resulting 19-item scale showed a good fit for the five-factor model (χ2 (142) = 507.63, pConclusionThis study provides researchers, therapists, and counselors with an efficient measurement tool to assess Assagioli's construct of will.