Examining the social signaling and person perception functions of loneliness

Loneliness is a common condition that poses substantial risks to morbidity and mortality. Cacioppo and Cacioppo’s [1] evolutionary theory of loneliness (ETL) provides that loneliness serves a social signaling function and also manifests in hypervigilance to threat, which we propose can influence person perception. In this experiment, 480 observers evaluated videotaped self-presentation messages from speakers who scored either high or low on a measure of loneliness. On the basis of ETL, we hypothesized that observers can distinguish between lonely and non-lonely speakers to a greater-than-chance degree and that observers’ own loneliness negatively influences their perceptions of speakers. Both predictions received support, and we identify both theoretic and potential clinical implications of these findings.