"A Social Dilemma is a situation in which the immediate individual interest may lead to a disaster for the collective (Messick & Brewer, 1983; Dawes & Messick, 2000). The Social Dilemmas paradigm was born and developed by economical and mathematical sciences and, in the last two decades, has become a very broad theoretical approach, flexible enough to be used in various disciplines to analyse different kinds of cooperative choices. Social Dilemmas are redefined as "commons dilemmas" (Hardin, 1968; Dawes, 1980; Brewer & Schneider, 1999); the first author that used this term was Dawes in 1980, inspired by the work of Hardin (1968) "The tragedy of the Commons". There are two kinds of Commons Dilemmas, Public Goods Dilemmas and Resources Dilemmas. They both are referred to a conflict between individual and collective interest, but in Public goods dilemmas, individuals must decide whether to cooperate or not; anyway, they have free access to common resources, whatever the level of the contribution (Dawes & Messick, 2000; van Dijk & Vilke, 2000). Some examples of Public Goods Dilemmas, are taxes or recycling. In Resource Dilemmas, the main problem is whether to take from a common resource for the individual interest or not. Every individual has got an immediate personal benefit from using the resource, but if all individuals act in such a way, the resource may be depleted and the collective will be worse than they restrainded themselves (Dawes & Messick, 2000; Van Vugt, 2000). Examples of Resources Dilemmas, in real world settings are the problems of natural resources management."