A computer-implemented method that determines interpersonal relationship influence information between participants in an interaction channel that includes inputting an interaction text response of communication by a participant made in an interaction channel. A type of influence relation of the interaction text response is determined on at least one other participant in the interaction channel based on relational descriptors. An influence score value for the interaction text response is determined, where the influence score value indicates how strongly the interaction text response influences the at least one other participant in the interaction channel. A pair-wise indication of a direction of influence of at least two participants in the interaction channel is determined. Interpersonal relationship influence information is output for the interaction text response for a participant pair in the interaction channel.
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