Validation and Comparison of the Informant-Rated and Self-Rated Versions of the Mild Behavioral Impairment Checklist.

BACKGROUND: The Mild Behavioral Impairment Checklist (MBI-C) has been developed to assess mild behavioral impairment (MBI). However, no study has validated the use of MBI-C using a promising translation method in Taiwan. Thus, consistency and discrepancy between informant-rated and self-rated scores have not been extensively researched. OBJECTIVE: This study validated and compared the informant- and self-rated versions of the MBI-C among community-dwelling people in Taiwan. METHOD: We recruited 202 pairs of individuals without dementia aged ≥50 years and their cohabitating informants. The participants completed the MBI-C (MBI-C-self), and the informants completed the MBI-C (MBI-C-informant) and the Neuropsychiatric Inventory Questionnaire (NPI-Q) independently. Internal consistency, inter-rater reliability, and convergent validity were examined. RESULTS: Both MBI-C-self and MBI-C-informant exhibited satisfactory Cronbach's α values (0.92 and 0.88, respectively). The MBI-C-informant total scorewas correlated with the NPI-Q total score (r = 0.83, p < 0.001). Inter-rater reliability between the two versions, as represented by the inter-rater correlation coefficient, was 0.57 (p < 0.001). The prevalence of MBI based on the MBI-C-informant scores was 1.5% higher than that based on the MBI-C-self scores according to the suggested cut-off score of 8.5. The affective dysregulation domain score of MBI-C-informant was significantly lower than that of MBI-C-self. CONCLUSION: MBI-C-informant exhibited both high reliability and validity. Discrepancies between MBI-C-informant and MBI-C-self related to the detection rates and affective dysregulation domain scores were noted. The level of consistency and discrepancy between these two versions provide implications for the use of MBI-C in clinical practice and future research.

Predicting effects of borderline personality symptoms and self-concept and identity disturbances on internet addiction, depression, and suicidality in college students: A prospective study.

The aims of this study were to evaluate the predicting effects of borderline personality symptoms and self-concept and identity disturbances on internet addiction, significant depression, and suicidality among college students at follow-up assessments conducted 1 year later. A sample of 500 college students aged between 20 and 30 years participated in this study. Their levels of borderline personality symptoms, self-concept and identity disturbances, internet addiction, depression, and suicidality at baseline and at follow-up interviews were assessed through the Borderline Symptoms List, Self-concept and Identity Measure, Chen Internet Addiction Scale, Beck Depression Inventory-II, and questions related to suicidality from the Epidemiological version of the Kiddie Schedule for Affective Disorders and Schizophrenia, respectively. A total of 324 college students received follow-up assessments 1 year later. Among them, 15.4%, 27.5%, and 17% had internet addiction, significant depression, and suicidality, respectively. Our result revealed the severity of borderline symptoms, disturbed identity, unconsolidated identity, and lack of identity at initial assessment increased the occurrence of internet addiction, significant depression, and suicidality at follow-up assessment except for the predictive effect of unconsolidated identity on internet addiction. The results indicated that self-concept and identity and borderline symptoms may have a significant role in the risk of mental health problems in college students.