Development of Pictorial Vocational Interest Inventory for Adolescents

Abstract

Introduction. This study aimed to develop Pictorial Vocational Interest Inventory (PVII), a vocational interest inventory for adolescents presented in the form of picture pairs, specially developed to represent the Holland’s RIASEC characteristics.Method. To obtain the evidence of test content, 31 experts judge the suitability of the PVII’s items with the theory. Items with high Aiken’s V index were selected and tested to the adolescents. The respondents for PVII’s testing were 826 High School students. The item analysis of PVII was performed for each interest type to select items with the corrected item-total correlation coefficient .30 or higher. Internal consistency and test-retest procedure were applied to get the reliability coefficients of the PVII. The construct validity for each type of interest was analyzed using Confirmatory Factor Analysis (CFA).Results. Based on Aiken's V index of .80 or higher, 24 items were selected each with corrected item-total correlation coefficients ranging from .308 to .684. Cronbach’s Alpha coefficients ranged from .600 to .788, while the test-retest reliability ranged from .707 to .820. The result of CFA showed that the factor loadings of the PVII’s items ranged from .403 to .820;  all of the factor loadings were significant at p< .01.Conclusion. The findings of this study provide psychometrics support of the PVII as an adequate instrument to assess vocational interest in adolescents.