Development and preliminary validation of a self-report measure of negative independent and dependent events in Japanese university students
We developed a self-report measure for assessing experiences of negative interpersonal dependent events, negative non-interpersonal dependent events, and negative independent events in Japanese university students, which was named the Negative Independent/Dependent Events Scale. We selected items having sufficient content validity in each negative events category. Undergraduate students (N = 247) responded to the Negative Independent/Dependent Events Scale and self-reported measures of depressive symptoms, reassurance-seeking behaviors, inattention, and lack of perseverance. Consistent with our prediction, all the negative events subscales had moderate positive correlations with depressive symptoms. Furthermore, the negative interpersonal dependent events subscale showed a moderate positive correlation with reassurance-seeking behaviors, and the negative non-interpersonal dependent events subscale showed a strong positive correlation with inattention. Moreover, the negative non-interpersonal dependent events subscale was more strongly correlated with inattention than the other two negative events subscales. In contrast, the negative interpersonal dependent events subscale was more strongly correlated with reassurance-seeking behaviors than with the negative independent events subscale but not more strongly than with the negative non-interpersonal dependent events subscale. These findings indicated the acceptable construct validity of the Negative Independent/Dependent Events Scale. However, further research is necessary to establish the discriminant validity of the negative interpersonal dependent events subscale and the negative non-interpersonal dependent events subscale.