In this study, 120 introductory psychology students participated in an experimental game designed to be manipulated by the use of cooperative cues. These are variables introduced into a social situation that function to guide the group toward collaboration. Prior research has focused on the effect of single cues and has produced mixed results, with some studies showing cooperative cues aiding cooperation and others indicating no positive effect. Three cooperative cues, communication, trust, and equality, were examined for both their isolated and their combined influence on the proportion of cooperation and number of cooperative game outcomes in games played by triads. When each cue acted alone, none elicited a greater proportion of cooperation than did a control group with no such cue. When the cues were combined, however, there was a marked increase in both the triad's proportion of cooperation and the number of games resolved through cooperation. This cooperative behavior may have been the product of the supportive and reinforcing properties of the interdependency of cooperative cues. (Author/IS)