
by Michel Gauquelin, Francoise Gauquelin, Jacques-Laurent Arnaud · Ediciones Mensajero, S.A. · tapa blanda · ISBN 9788427109544

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«20 tests para conocerse» is a psychology guide by Michel Gauquelin, Françoise Gauquelin and Jacques-Laurent Arnaud, in paperback.
The work brings together twenty psychological tests to encourage self-knowledge. Its questionnaires address traits such as leadership, emotional balance, tolerance or attitude towards others, and each block offers an interpretation of the responses to outline a personal profile.
The work belongs to the collection «La psicología moderna», from Ediciones Mensajero, focused on psychological tests.
For readers interested in practical psychology and in getting to know themselves better through personality tests.

The Mars effect is a purported statistical correlation between athletic eminence and the position of the planet Mars relative to the horizon at time and place of birth. This controversial finding was first reported by the French psychologist and "neo-astrologer" Michel Gauquelin. In his book L'influence des astres, Gauquelin suggested that a statistically significant number of sports champions were born just after the planet Mars rises or culminates. He also divided the plane of the ecliptic into twelve sectors, identifying two "key" sectors of statistical significance.
