Are the biased messages more effective then unbiased ones?

The works in the field of the mass psychology let us put forward hypothesis of correspondence between the structure of discourse and the mental struct ure of a group. This hypothesis assumes that the messages addressed to a la rge public are as effective as they are biased. Thus the researches on the minority influence have showed that social influence is a function of the s ocio-cognitive conflict caused by the message of the influence source (Tros t M., Maass A. and Kenrick D., 1992; Perez J.A. and Mugny G., 1989). This s tatement allows to suggest that under certain circumstances the conflict be tween the inference rules applied in the message and the cognitive biases s upposingly shared by individuals provoke influence. The three experiments ( n = 126, n = 143 and n = 139) made it possible to identify changes caused b y the message type depending on the source that diffuse them, by means of t he factor plan "3 (majority source, minority source and an anonymous source ) by 2 (in presence of bias and out of bias) by 3 (the type of a bias appli ed in the experiment)". Our results modify the classic hypothesis and show that when the biased messages propagated by the majority or the anonymous s ource induce the major direct influence, only the cognitively unbiased mess ages sent by the minority exercise the indirect influence. At the same time the modification of the presented message type highlighted the results for the most ambiguous biases.