El autor comienza exponiendo la evolución histórica del estudio de las diferencias entre sexos y los núcleos de interés desde 1959, destacando que desde la perspectiva biosocial el problema se centra actualmente en los intentos de una definición operativa de aspectos parciales del problema y sus posibles interacciones. Tras realizar un balance de los hallazgos actuales proporcionados por la aplicación del método descriptivo y analizando algunos de sus aspectos metodológicos, el autor se centra en las explicaciones biológicas de las diferencias desde tres vertientes: genética, bioquímica y neurológica. El artículo finaliza con las perspectivas futuras en el estudio del tema, destacando que los datos acumulados no ofrecen ninguna ley de carácter científico sino muy pocas generalizaciones que además tienen excepciones significativas. El autor sugiere que el problema fundamental es la definición operativa de la variable “sexo” y destaca la utilidad del lenguaje matemático en la construcción de un modelo más complejo y estructurado de las diferencias-semejanzas según el sexo.
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