Worker & caller behaviors are studied & compared in an available sample of 100 suicidal calls to 3 crisis intervention centers. Caller-Worker Interaction Program results were compared among the 3 centers. Worker & caller differences across centers were significant in 32 of 41 categories (p< .05); using 4 discriminant functions, 2 of 18 hit percentages exceeded p<.01. The verbal behaviors of workers & callers at the 3 centers are substantially different between centers but similar within them.