“3. For the first time, it has been possible to map out in a clear and unambiguous manner the neurological determinants of the major dimensions of personality and to show, after more than two millennia, the essential validity of the fourfold classification of temperaments into the melancholic, sanguine, phlegmatic, and choleric types.

“4. The same fundamental dimensions of neurological variation determine the ‘structure’ of intelligence, and with this new knowledge, it is possible to reconcile earlier conflicting notions of intelligence structure proposed by Spearman and Cattell.

“9. Reference to the new theory demonstrates how Freud was led to erroneous conclusions, and alternative explanations are provided for the chief phenomena of chief interest to him.

“15. No less important than the medical and educational applications, there is a sure and certain basis for providing vocational guidance and for the determination of employee selection criteria which would guarantee major improvements in human resource management.”