Development of Taiwan Undergraduates' Volunteer Service Motivation Scale

Abstract

This study aims to develop Taiwan undergraduates' volunteer service motivation scale. To begin with, item pool was proposed on the basis of literature. After discussing with three Taiwan undergraduates, item pool, exploratory factor analysis (EFA) (N＝150) was proceeded, where three tests were conducted EFA: 1. Item analysis: comparisons of extreme groups and correlation analysis were employed. The former's critical ratios are all more than 3, and reach significant standard, showing the 20 items have discriminating power. The latter shows that the r value of all items and the total score are all more than .60, and reach significant standard (p＜.001), showing the items can measure the same concept. 2. Factor analysis: primary axis factoring and the promax method of oblique rotation were adopted. In the first EFA, the 5 items concerning interpersonal relationship were distributed to other factors; and, due to incompatibility with other factors, so this dimension of Interpersonal Relationship was deleted. The 2nd EFA's results are consistent with the original design, which is categorized into Self-Growth, Serving Others, and Social Identification, and has appropriate total variation and total reliability. In order to verify the stability of the EFA factors, another batch of samples (N＝452) were investigated through confirmatory factor analysis (CFA). In accordance with the CFA's results, the initial model's test are acceptable without offending estimations, the basic fit of the initial model is in good fitness (including individual reliability, composite reliability, the average variance extracted, construct discrimination). To conclude, these 15 items 3 factors of Taiwan Undergraduates' Volunteer Service Motivation Scale has acceptable reliability and validity; therefore, it can serve as the scale to investigate Taiwan undergraduates' volunteer service motivation for proceeding the relative studies.