The author presents a model for the application of the techniques used in advanced statistics (factorial correspondence analysis, as proposed by J.P. Benzecri) to the formal analysis of the contours of Palaeolithic rock art figures in various francocantabric caves. The figures were first reduced to the same scale, then an axis was designed along which continuous variables could be taken relative to the dorsal (superior) and ventral (inferior) contours. Various axes and a number of variables were tested. Graduations in the degree of formal similarities were used to form an ensemble of figures and to attribute authorship to the same individual. The author supposes that this type of analysis helps in determining degrees of affinity in such a way that a rational hypothesis relative to author or school can be accepted. -- AATA