Social Anxiety and Social Behavior: A Test of Predictions From an Evolutionary Model

An influential evolutionary model proposed that social anxiety biases people to treat social interactions as competitive struggles with the primary goal of avoiding status loss. Among subordinate nonhuman primates in highly hierarchical social groups, this goal leads to adaptive submissive behavior; for humans, however, affiliative responses may be more effective. We tested three predictions about social anxiety and social cognitions, emotions, and behavior that Trower and Gilbert advanced. College students (N = 122) whose self-reported social anxiety ranged from minimal to extremely high played the Prisoner's Dilemma game three times. Consistent with two model-based predictions, social anxiety was positively associated with self-reported competitive goals and with nervousness during game play. Unexpectedly, however, social anxiety was associated with a tendency to engage with coplayers in an ostensibly hostile, rather than appeasing, manner. We discuss implications of these findings for updated models of socially anxious behavior.