The Development and Validity of the Interpersonal Intelligence Inventory (2022)

Abstract

This study aims to investigate and develop a self-report inventory that will measure a person?s tendency to develop interpersonal intelligence based on Howard Gardner. The said inventory consisted of a 16-item, four-point forced choice Likert scale with a verbal interpretation that ranged from "Describes me very well" (4) to "Describes me extremely poorly" (1). The inventory was administered to a total of 133 respondents for pilot testing and 375 as the normative sample. The majority of the respondents were in the age range of 18?24 years old (54%), had bachelor?s degrees (61%), were female (66%), and had single status (77%). Based on the results, it was found that the self-reported inventory is reliable with a Cronbach's alpha of .89 and an inter-item correlation ranging from .37-.69, which both are acceptable. In terms of validity, the self-reported inventory underwent content and construct validity. The construct validity was assessed through Principal Component Analysis using promax rotation. The KMO index was .90, which is said to be in an acceptable range. Likewise, with the Bartlett's Test of Sphericity, it is statistically significant to conduct principal component analysis X2(120) = 2112.92, p < 0.001. Confirmatory factor analysis was also found to be acceptable, giving the idea that the inventory is suitable for the model. Using a content validity index, the 16 items showed an S-CVI/UA index of "1", which is suggested to be excellent. Data was also observed to have a normal distribution. Recommendations were made to further improve the self-report inventory.