“…Previous communication studies have argued that source credibility increases the likelihood of persuasion (Chen et al, 2021 ; Horai et al, 1974 ; Hovland & Weiss, 1951 ; Johnson & Izzett, 1969 ; Powell, 1965 ; Warren, 1969 ) and is derived from the source’s expertise or trustworthiness (Hovland et al, 1953 ). In particular, researchers have examined source expertise as a key factor that increases source credibility, thereby positively affecting the attitudes of other individuals in communication contexts (Gilly et al, 1998 ; Hass, 1981 ; Lin et al, 2021 ; Lu et al, 2022 ; Nataraajan & Chawla, 1997 ; Pornpitakpan, 2004 ; Sternthal et al, 1978 ). Source expertise refers to a receiver’s perception of whether a sender is sufficiently knowledgeable to make accurate judgments and recommendations regarding a certain issue (Birnbaum & Stegner, 1979 ; Hovland et al, 1953 ).…”