The alone team: How an alone mindset affects group processes

Being alone is a basic and prevalent human experience, yet little is known about its effects on social identity. When alone, social identity may weaken because individuals feel their groups are less valuable or less salient. Conversely, it may strengthen because craving for bonding increases in-group perceived value. We tested these ideas with five experiments (N = 1312). Study 1, using existing groups, and Study 2, using minimal groups, showed that aloneness (vs. being with others) reduced in-group identity through its effect on in-group esteem. In Study 3, this effect was equivalent to the effect observed following social exclusion. Study 4 showed that individuals alone were indifferent in allocating money between in-group and out-group members. Last, Study 5 indicated that these effects do not stem from reduced salience of in-group members when alone. In conclusion, an alone mindset affects social identity by decreasing in-group esteem, signalling broad social implications for this basic social condition.