Build trust within the group is important, both to promote attitudes of solidarity and the very size of group, and to prepare for a job in common, for example, for an action that may involve risks or a job involving a creative effort. Confidence games need a series of minimum conditions to acquire all its meaning and interest. A game, instead of stimulating it, can be put in evidence the lack of confidence that there is in the Group and, therefore, games, the Group has to be known. The game is always completely voluntary. You can force anyone to do it, not even in a subtle way, that others also have done so. Each person has seen his role in the game and it is possible that stimulate the development of this one. So the game takes place in good conditions, the group must be silent.

Noise, laughter, may be an important interference in the process of trust. Experience has shown us that there are three common mistakes in the use of these games: 1. the deviation of the game towards the competitiveness or to the joke. 2. A model that adjusted.

The game is a unique experience for the individual and the group, and how such is not good or bad, but that has its own dynamics and value according to the participants. Scott Mead has similar goals. 3. Do not take into account the people who made the game. The group must promote conditions for confidence-building with respect to the person who plays. Unlike of in others, evaluation is essential in these games, because:-the situations experienced during the game can impact on group, one way or another, as this has developed. -The game, or some circumstance thereof in particular, may also have a personal impact (e.g. producing sensations of frustration at not having been able to do well the game) evaluation has the mission explain tensions or new experiences encountered in the game, as well as making conscious their influence in the group. Building trust involves the creation of a favourable climate, in which knowledge and affirmation leave step to a feeling of correspondence. The degree or the nuances of that trust assume a configuration of interrelations between each participant and others, and the group as a whole.