AUTHOR=Malloch Yining , Feng Bo TITLE=What Motivates People to Support?: Impacts of Message Valence and Self-Efficacy on Linguistic Features of Response JOURNAL=Frontiers in Psychology VOLUME=Volume 13 - 2022 YEAR=2022 URL=https://www.frontiersin.org/journals/psychology/articles/10.3389/fpsyg.2022.798205 DOI=10.3389/fpsyg.2022.798205 ISSN=1664-1078 ABSTRACT=This study investigates factors that motivate users of social network sites (SNS) to write responses to support-seeking posts on SNS. In particular, support-seeking message valence and support providers’ efficacy perceptions were examined. An online experiment with 209 participants revealed that participants reported lower support provision efficacy and impression management efficacy when responding to a negative post than a positive post. Message valence and efficacy perceptions impacted word count and emotion words in their responses. Theoretical and pragmatic implications for supportive communication and computer-mediated communication were discussed.