The French psychologist Binet believed that evaluating an individual’s intellectual abilities should be based on a comprehensive approach. In this sense, the subject was to be subjected not only to the cognitive testing procedure itself but also to a physical examination so that the specialist could have a more general idea about the patient.
In addition, Binet developed a theory of thinking and was able to differentiate the essential components of the human thought process. Galton studied in detail the phenomenon of personality differences and was able to show that the successful development of children in the family is the result not only of external factors but also of biological predictors. Galton worked hard on the psychometric aspects of the theory of heredity and suggested a genetic mechanism for the formation of unhealthy habits.
In addition, it was Galton who made a significant contribution to the existence of dactyloscopy as a qualitative analysis of an individual by the unique shape of a fingerprint. Both scientists contributed to the development of psychology, contributing to the increased study of personality differentiation and the predictors associated with the evolution of the individual.