J.—PSYCHOLOGY 167 
example is a very intelligent person who has been totally blind from birth. 
I found that the subject had no idea at all of the size of the sun as it 
appeared inthesky. The subject imagined that most stars had five points, 
but that some had six or even eight, and that a rainbow had the shape of 
a tied bow, and so forth. Manifestly all knowing, even in the case of the 
- gifted, must start from experiencing. 
Now that the method of factorial analysis is becoming increasingly 
effective, not only in the case of cognitive abilities, but also with regard to 
personality in all its aspects, it becomes necessary to study age as one of 
the ‘ primordial potencies’ more systematically. Not only during child- 
hood and adolescence, but throughout the life-span. This will determine 
the relative importance of the various traits at different stages of life, and 
this in turn will lead to a fuller psychological interpretation of the unitary 
traits themselves. 
BIBLIOGRAPHY. 
Apams, H. F., ‘ The good judge of personality,’ J. Abn. Psychol., 22, 1927-28. 
BarkKIN, S., ‘ Economic difficulties of older men,’ Personnel J., 11, 1933. 
Borton, J. SHAw, ‘ The evolution of mind’ (Lumleian Lectures), The Lancet, 
March 23 and 30, 1935. 
Bunter, Cu., Dey Menschliche Lebenslauf als Psychologisches Problem, 1933. 
ConraD, H. S., Jones, H. E., Hsiao, H. H., ‘ Sex differences in mental growth 
and decline,’ J. Educ. Psychol., 24, 1933. 
Cox, C. M., (Mrs. W. R. Mitss), ‘ The early mental traits of three hundred 
geniuses,’ 1926. 
Dorianp, W. A. N., ‘ The age of mental virility,’ 1908. 
EHINGER, G., ‘ Déclin des aptitudes avec l’Age,’ Arch. d. Psychol., 20, 1927, and 
28, 1931. 
Foro, A., ‘ Pedestrian accidents and age,’ Personnel J., 8, 1930. 
Gatton, F., ‘ The measurement of character,’ Fortnightly Rev., 42, 1884. 
GIEsE, F., ‘ Erlebnisformen des Alterns,’ Deutsche Psychol., 5, 1928. 
Heypr, C., ‘Der Einfluss des Alters bei Eignungsuntersuchungen,’ Industr. 
Psychotechnik, 2, 1925. 
Ho.Liinecworty, H. L., ‘ Mental growth and decline,’ 1927. 
Jones, H. E., and Conrap, H. S., ‘ The growth and decline of intelligence,’ 
Genet. Psychol. Monog., 1933. 
Jones, Lit. Wywn, ‘ Theory and practice of psychology,’ 1934. (Ref. to age 
allowances on pp. 229, 230.) 
KENNEDY, F., ‘ Age correction as an explanation of the discrepancy between 
scholastic attainment and mental test results.’ Suppit. to Scottish Educ. J., 
March, 1931. 
Martin, L. J., and pEGrucHYy, C., (1) ‘ Salvaging old age,’ 1930; (2) ‘Sweeping 
the cobwebs,’ 1933. 
McDoueatt, W., ‘ The chemical theory of temperament applied to introversion 
and extroversion,’ J. Abn. Psychol., 24, 1929. 
Mires, W. R., ‘ Measures of certain human abilities throughout the life span,’ 
Proc. Nat. Acad. of Sciences, 17, 1931. 
Migs, W. R., ‘ Change of dexterity with age,’ Proc. Soc. for Exp. Biol. and Med., 
29, 1931. 
Mites, W. R., ‘ Correlation of reaction and co-ordination speed with age in 
adults,’ Amer. J. Psychol., 48, 1931. 
Mires, C. C., and Mires, W. R., ‘ The correlation of intelligence scores and 
chronological age from early to late maturity,’ Amer. J. Psychol., 44, 1932. 
Mites, W. R., ‘ Age and human ability,’ Psychol. Rev., 40, 1933. 
MitEs, W. R., ‘ Abilities of older men,’ Personnel J., 11, 1933. 
MitEs, C. C., ‘ Influence of speed and age on intelligence scores of adults,’ J. 
General Psychol., 1934. 
