The eyes are extremely important in communication and can send a multitude of different messages. Someone’s pupilsize carries significant social information and can reflect different cognitive and... Show moreThe eyes are extremely important in communication and can send a multitude of different messages. Someone’s pupilsize carries significant social information and can reflect different cognitive and affective states that within a social interaction can prove to be particularly meaningful. In 3 studies we investigated the impact of a person’s pupilsize on how others evaluate that person. In Experiment 1, participants played trust games in the role of investor. The results demonstrate that participants trusted happy compared with angry partners more, as well as those with dilating compared with constricting pupils, to whom they also assigned more positive personality traits including friendliness, attractiveness, and trustworthiness. In Experiment 2, participants played the same trust game, but this time in the role of trustee, where they had to decide to reciprocate and share a financial gain with the investor or to keep it for themselves, and act selfishly. The results show that participants reciprocated more to partners with dilating compared with constricting pupils. In Experiment 3, we found preliminary evidence that these positive behavioral changes are likely to be specifically directed to the virtual partner and do not reflect a general positivity bias. To conclude, pupilsize is an important social cue that others implicitly take into account when making social decisions. (PsycINFO Database Record (c) 2019 APA, all rights reserved) Show less
Passive social media use (PSMU)—for example, scrolling through social media news feeds—has been associated with depression symptoms. It is unclear, however, if PSMU causes depression symptoms or... Show morePassive social media use (PSMU)—for example, scrolling through social media news feeds—has been associated with depression symptoms. It is unclear, however, if PSMU causes depression symptoms or vice versa. In this study, 125 students reported PSMU, depression symptoms, and stress 7 times daily for 14 days. We used multilevel vector autoregressive time-series models to estimate (a) contemporaneous, (b) temporal, and (c) between-subjects associations among these variables. (a) More time spent on PSMU was associated with higher levels of interest loss, concentration problems, fatigue, and loneliness. (b) Fatigue and loneliness predicted PSMU across time, but PSMU predicted neither depression symptoms nor stress. (c) Mean PSMU levels were positively correlated with several depression symptoms (e.g., depressed mood and feeling inferior), but these associations disappeared when controlling for all other variables. Altogether, we identified complex relations between PSMU and specific depression symptoms that warrant further research into potentially causal relationships. Show less
