危机咨询中表达自杀风险的突然变化

Crisis counseling aims to reduce suicide risk in a single conversation. Although recent studies have suggested that suicide risk can change nonlinearly over time, few have examined moment-to-moment changes in brief conversations. In this study, we investigated sudden shifts in the expressed suicide risk during crisis chats. Using 2,110,114 messages from 81,569 text-based crisis-line chats, we adapted sudden-gain and -loss criteria from psychotherapy research to identify within-conversations sudden changes in suicide risk. A machine-learning model assessed message-level suicide-risk expression.