Previous research has demonstrated self-reports of lower levels of four fundamental needs as a result of short periods of face-to-face ostracism, as well as short periods of Internet ostracism (Cyberball), even when the ostracizing others are unseen, unknown, and not-to-be met. In an attempt to reduce the ostracism experience to a level that would no longer be aversive, we (in Study 1) convinced participants that they were playing Cyberball against a computer, yet still found comparable negative impact compared to when the participants thought they were being ostracized by real others. In Study 2, we took this a step further, and additionally manipulated whether the participants were told the computer or humans were scripted (or told) what to do in the game. Once again, even after removing all remnants of sinister attributions, ostracism was similarly aversive. We interpret these results as strong evidence for a very primitive and automatic adaptive sensitivity to even the slightest hint of social exclusion.

How low can you go? Ostracism by a computer is sufficient to lower self-reported levels of belonging, control, self-esteem, and meaningful existence