The present study was undertaken to determine whether measurements of chronaxia might be of value as indicators of the conditions in the brain associated with intellectual or cognitive performances. Specifically, we wished to determine whether there is any relation between various chronaxic measures and the level of intelligence of a subject as measured by the Binet tests.
Our reason for thinking that a relation may exist lies in the body of evidence that the chronaxias of motor nerves depend on the influence of the higher brain centers. It is possible, then, that the conditions in the brain on which the chronaxias depend are also factors in intellectual performances. If this association does exist, an additional point of attack on the question of the constitutional basis of intelligence will become available. The literature relating to the influence of conditions in the brain on the chronaxias of motor nerves is not altogether