Research investigating reciprocal concessions and in-group-out-group biases found both reciprocal concessions and in-group context to be important in the DITF technique. In-groups are groups that a person feels that they belong to, while out-groups are ones that a person does not belong to and might perceive negatively. This study employed two different types of confederates, in-group confederates who dressed and acted like college students and out-group confederates who dressed and acted more formally. The in-group confederates introduced themselves as university students, while the out-group confederates introduced themselves as private business school students. All of the participants in this study went to the same university as the in-group confederates. The confederates either made a large request then a smaller one, a smaller request alone, or offered the participant a choice of both requests. Results show greater compliance to the second smaller request for the in-group confederates compared to out-group confederates, but there was still a DITF effect in the out-group context. Participants were most likely to comply to requests from those within their social groups, yet they still had increased compliance to the smaller second request for people outside of their social groups. The researchers suggest that this is evidence for reciprocal concessions because the influence of social group and the DITF effect work independently of each other, therefore, there must be another explanation for DITF that does not involve in-group-out-group biases. The researchers fail to mention the social responsibility explanation, however.