Claude Lévy-Leboyer, a psychologist and consultant for business enterprises, was formerly a lecturer in the psychology of work at René Descartes-Paris-V University. She is the author of some fifteen books dealing with motivation, skills management and intelligence in the workplace. Among them: Le Bilan de compétences (1993), Evaluation du personnel. Quels objectifs? Quelles méthodes? (1996), Le “360°”, instrument de développement personnel (2000), Remotiver au travail (2007) and La Gestion des compétences (8th edition, 2009).


Does heredity play a larger role than social and family background in determining intelligence?
Does intelligence diminish with age?
Is the growing complexity of the world making the human population more intelligent?
Do very intelligent children become very intelligent adults?
Does the multiplication of forms of intelligence (emotional, social, practical, fluid, etc.) call into question the existence of general intelligence?
These questions are rarely addressed in books about intelligence: either because such books are primarily concerned with the appropriate use of intelligence testing, or because their goal is to offer “how-to” methods to conserve intelligence potential. And yet intelligence has become an extremely prolific area of research. Having appropriated the advances made in various scientific disciplines (biology, sociology, experimental psychology), it is now capable of providing reliable certainties when evaluating different Intelligence Quotients.

• A neutral, objective, non-partisan presentation covering what is now known about intelligence.

• A clear synthesis of the most recent research results on IQ and other intelligence tests.

• The author’s solid conclusions are based on clearly demonstrated facts and on data gathered through innovative enquiries.