The present paper reports the results of research aimed at testing the construct validity of adjectives selected as markers for the << Big Five >> personality model. First, we present evidence for construct validity of these dimensions in international research and conclude that these factors are not mere cognitive illusions but indeed personality dimensions. Then we present the results of the present study, concluding that the five dimensions of the << Big Five >> model can be extracted in the French semantic and cultural context. These dimensions are robust and stable.