“…The major contribution of this paper is that it has clarified the psychological mechanism underlying the CASA framework by examining the serial mediation of user emotional disclosure and perceived intimacy. Social penetration theory supports our findings that emotional disclosure compels a conversational partner to have the same level of disclosure to maintain reciprocity (Carpenter & Greene, 2016), which then leads to higher intimacy with the conversational partner (Carpenter & Greene, 2016;Fehr, 2004;Lee et al, 2020) and various beneficial outcomes such as lower depression (Reis & Franks, 1994) and higher social support satisfaction (Johnson et al, 1993), perceived understanding (Reis et al, 2017), enjoyment of self-insight and personal growth (Reis & Shaver, 1988), purchase intention (Yin et al, 2019), continuous intention (Lin et al, 2021), and repurchase intention (Huaman-Ramirez et al, 2022). Uncertainty reduction theory further supports the effect of initial emotional disclosure in reducing uncertainty in an early-stage relationship and increasing the level of emotional exchange (Berger & Calabrese, 1975), which can lead to a feeling of being understood and successful psychotherapeutic alliances (Elliott et al, 2011), satisfaction and behavior change (Sanford, 2006), and other benefits (Reis et al, 2017).…”