Abstract
Interpersonal Needs Questionnaire (INQ) is a self-report measure of perceived burdensomeness and thwarted belongingness with five versions in recent studies. There are five versions of INQ. But results from studies using different versions are quite different. Current suicide behavior among teenagers has attracted much attention. But which version is more suitable for teenage samples is still uncertain. It is important to compare the potential differences in different versions of INQ to identify the most psychometrically available version to predict teenagers' acquired capability for suicide and provide them with timely help to reduce teenagers' suicide rates. This study compared the construct validity, internal consistency, validity, and average test information of each version in the sample of teenagers. Results showed the 10-item version provided the most average test information in both thwarted belongingness subscale and perceived burdensomeness subscale, and the INQ-10 is more suitable for teenage samples.
Highlights
Suicide is a major social and public health problem facing the world
The results suggested that the Interpersonal Needs Questionnaire (INQ)-10 could provide more measurement precision for varying degrees of perceived burdensomeness, and this suggested that the INQ-10 might be more useful in teenage samples for measuring perceived burdensomeness in clinical trials and measuring perceived burdensomeness as an index of treatment response
The present study provides the first comparison of five versions of INQ simultaneously within teenage samples
Summary
Suicide is a major social and public health problem facing the world. Nearly 800,000 people commit suicide each year, and the number of suicide attempts is many times the number of suicides. Based on IPTS, Van Orden (2009) further confirmed and extended the theory that perceived burdensomeness and thwarted belongingness were combined into interpersonal needs and constructed a corresponding Interpersonal Needs Questionnaire (INQ) with 25 items to reflect whether current interpersonal relationship needs of the individual were met. The INQ-25 (Anestis and Joiner, 2011), the INQ-18 (Wong et al, 2011), the INQ-12 (Hill and Pettit, 2012), and INQ-10 (Bryan et al, 2012) have been confirmed that perceived burdensomeness was a significant predictor, but thwarted belongingness was not On the contrary, both perceived burdensomeness and thwarted belongingness had adequate predictive validity in the 12-item version (Lamis and Malone, 2011) and the 15-item version (Van Orden et al, 2012). We have investigated and compared the psychometric properties of five versions of the INQ based on an IRT model, to identify the version (or versions), which is more suitable for teenage samples to assess interpersonal needs.
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