“…When social exclusion is detected, even the most subtle cue of exclusion, it activates the neural circuitry of physical pain (e.g., Eisenberger, Lieberman, & Williams, 2003) and elicits emotional distress (e.g., Williams, Cheung, & Choi, 2000). Immediate social exclusion is extremely aversive (Williams, 2007) and longer lasting exclusion may have serious ill effects, including feelings of helplessness, alienation, and despair, and often leads to antisocial behavior such as direct and indirect aggression toward and derogation of the person doing the exclusion (e.g., Twenge, Baumeister, Tice, & Stucke, 2001). Recently, Kerr and Levine (2008) suggested that even signs of anticipated exclusion and avoidance (e.g., not approaching, moving or turning away, not saying hello) are reliably associated with feelings of rejection and exclusion.…”