According to Charles Spearman, abilities are correlated with each other and he came up with the two intelligence theory. According to him there are specific factors which measure intelligence. However, at the same time there is another widely held theory which has been given much importance- Robert Sternberg’s theory of triarchic theory.
According to him, intelligence has many components and the external environment can play an important role in defining the abilities. This can be verified by the factor that many of the children who were exposed to certain educational and professional backgrounds took on those professionals when they grew up.
The above theory has three important elements; the practical ability, creative ability and analytical ability. Practical ability allows the person to adapt to his background and shape one’s development. This can result in the person backing away from traditional roots, and choosing a separate environment from which the person has been used to.