THE 3 COMPONENTS OF INTELLIGENCE - EVOLUTIONARY SPECIALIZATION IN MENTAL ABILITIES

A biological theory of intelligence is presented. This theory is based on information-theoretical model of hemispheric differences. This the ory bases the chunking theory of Miller (1956) on the analytical-synth etical hemispheric dichotomy of Levy-Agresti & Sperry (1968). Thus all the intellectual abilities comprise three basic components: The analy tical ability of the left hemisphere, the synthetical ability of the r ight one, and the efficiency of the interhemispheric commissures, whic h may underly the factor g of general intelligence. The left- and righ t-hemispheric mechanisms produce different quantities of heat. Therefo re different climatic conditions enhanced the evolution of different h emispheric mechanisms in different ethnical groups, thus different cog nitive styles might have evolved. It is suggested that the visual-spat ial factor of intelligence may be misinterpreted.