I just want to matter: Examining the role of anti-mattering in online suicide support communities using natural language processing. - Nicholas Deas; Robin M. Kowalski; Sophie Finnell; Emily Radovic; Hailey Carroll; Chelsea Robbins; Andrew Cook; Kenzie Hurley; Natalie Cote; Kelly Evans; Isabella Lorenzo; Kelly Kiser; et al. (Comput. Hum. Behav., 2023)