The test was devised by the writer and used in 1905 in a study of the intellectual processes of bright and dull boys, but it was not at that time standardized. It has been found to belong at a much higher mental level than was at first supposed. Only an insignificant number pass the test below the mental age of 14 years, and about two thirds of "average adults" fail. Of our "superior adults" somewhat more than 75 per cent succeed. Formal education influences the test little or not at all, the unschooled business men making a somewhat better showing than the high-school students. SELECTED REFERENCES The following classified lists include only the most important references under each topic. So many investigations have been made with the Binet-Simon tests in the last few years, and so many articles have been written in evaluation of the method, that a complete bibliography of the subject would require thirty or forty pages. Those who desire to make a more thorough study of the literature are referred to the admirable annotated bibliography compiled by Samuel C. Kohs, and published by Warwick & York, Baltimore. Kohs's Bibliography contains 254 references, and is complete to January 1, 1914. BINET-SIMON TESTS OF NORMAL CHILDREN 1. Binet, A., _et_ Simon, Th. "Le développement de l'intelligence chez les enfants"; in _Année psychologique_ (1908), vol. 14, pp. 1-94. Exposition of the original 1908 scale with results. 2. Binet, A. "Nouvelles recherches sur la mesure du niveau intellectuel chez les enfants d'école"; in _Année psychologique_ (1911), vol. 17, pp. 145-201. Presents the 1911 revision. 3. Bobertag, O. "Ueber Intelligenzprüfungen (nach der Methode von Binet und Simon)"; in _Zeitschrift für angewande Psychologie_ (1911), vol. 5, pp. 105-203; and (1912), vol. 6, pp. 495-537. Analysis of 400 cases and criticism of method and results. 4. Dougherty, M. L. "Report on the Binet-Simon Tests given to Four Hundred and Eighty-three Children in the Public Schools of Kansas City, Kansas"; in _Journal of Educational Psychology_ (1913), vol. 4, pp. 338-52. 5. Goddard, H. H. "The Binet-Simon Measuring Scale for Intelligence, Revised"; in _Training School Bulletin_ (1911), vol. 8, pp. 56-62. 6. Hoffman, A. "Vergleichende Intelligenzprüfungen an Vorschülern und Volksschülern"; in _Zeitschrift für angewande Psychologie_ (1913), vol. 8, pp. 102-20. One hundred and fifty-six subjects. Ages seven, nine, and ten. 7. Johnston, Katherine L. "Binet's Method for the Measurement of Intelligence; Some Results"; in _Journal of Experimental Pedagogy_ (1911), vol. 1, pp. 24-31. Results of 200 tests of school children.