[1] The fullest account of the modern studies on individual differences is to be found in: William Stern: Die differentielle Psychologie in ihren methodischen Grundlagen. (Leipzig, 1911.)
[2] The practical applications of psychology in education, law, and medicine, I have discussed in detail in the books: Münsterberg: Psychology and the Teacher. (New York, 1910.) Münsterberg: On the Witness Stand. (New York, 1908.) (English edition under the title: Psychology and Crime.) Münsterberg: Psychotherapy (New York, 1909.)
[3] Frank Parsons: Choosing a Vocation. (Boston, 1909.)
[4] M. Bloomfield: The Vocational Guidance of Youth. (Boston, 1911.)
[5] Vocations for Boys. (Issued by the Vocation Bureau of Boston. 1912.) Vocations for Boston Girls. (Issued by the Girls' Trade Education League. 1911.) Bulletins of Vocation Series. (Issued by the Women's Educational and Industrial Union. 1911.)
[6] F.W. Taylor: The Principles of Scientific Management. (New York, 1911.) H.L. Gantt: Work, Wages, and Profits. (New York, 1912.) And the books of Emerson, Gilbreth, Goldmark, etc., to be mentioned later.
[7] H. Emerson: Efficiency as a Basis for Operation and Wages. (New York, 1912, p. 107.)
[8] H. Emerson: The Twelve Principles of Efficiency. (New York, 1912, p. 176.)
[9] H Emerson: The Twelve Principles, p. 156.
[10] H. Emerson: The Twelve Principles, p. 177.
[11] F.W. Taylor: The Principles of Scientific Management, pp. 86-97.
[12] The experiments are being conducted and will be published by Mr. J.W. Bridges.
[13] Investigation of Telephone Companies: Bureau of Labor. (Washington, Government Printing Office, 1910.)
[14] Ries: Beiträge zur Methodik der Intelligenzprüfung. (Zeitschrift für Psychologie, 1910, vol. 56.)
[15] For a survey of a large number of such tests and bibliography, compare: G.M. Whipple: Manual of Mental and Physical Tests. (Baltimore, 1911.)
[16] F.L. Wells: The Relation of Practice to Individual Differences. (American Journal of Psychology, 1912, vol. 23, pp. 75-88.)
[17] M. Bernays: Auslese und Anpassung der Arbeiterschaft der geschlossenen Grossindustrie, dargestellt an den Verhältnissen der Gladbacher Spinnerei und Weberei. (Leipzig, 1910, p. 337.)
[18] H.C. McComas: Some Types of Attention. (Psychological Review Monographs, vol. 13, 3, 1911.)
[19] Max Weber: Zur Psychophysik der industriellen Arbeit. (Archiv für Sozialwissenschaft und Sozialpolitik, 1908 and 1909, vols. 27 and 28.)
[20] Bryan and Harter: Studies in the Telegraphic Language. (Psychological Review, vol. 4.)
[21] W.F. Book: The Psychology of Skill. (University of Montana, Publications in Psychology, 1910.)
[22] H. Münsterberg: Beiträge zur experimentellen Psychologie. (Book iv, 1892.)
[23] A.J. Culler: Interference and Adaptability. (Archives of Psychology, 1912.)
[24] The experiments are being conducted and will be published by Mr. L.W. Kline.
[25] Adolf Gerson: Die physiologischen Grundlagen der Arbeitsteilung. (Zeitschrift für Sozialwissenschaft, 1907.)
[26] Karl Bücher: Arbeit und Rhythmus. (Fourth Edition, Leipzig, 1909, p. 438.)
[27] Frank G. Gilbreth: Motion Study. (New York, 1911.)
[28] Taylor: The Principles of Scientific Management. (New York, 1911, p. 71.)
[29] The experiments are being conducted and will be published by Mr. E.R. Riesen.
[30] R. Herbertz: Zur Psychologie des Maschinenschreibens. (Zeitschrift für angewandte Psychologie, 1908, vol. 2, p. 551.)
[31] C.L. Vaughan: The Moter Power of Complexity. (Harvard Psychological Studies, vol. 2, 1906, p. 527.)
[32] G.M. Stratton: Some Experiments in the Perception of the Movement, Color, and Direction of Lights. (Psychological Review Monographs, vol. 10, 1908.)
[33] The experiments are being conducted and will be published by Miss L.M. Seeley.
[34] H. Münsterberg: Beiträge sur experimentellen Psychologie. (Book iv, 1892.)
[35] R.S. Woodworth: Accuracy of Voluntary Movement. (Psychological Review Monographs, vol. 8, 1899.)
[36] B.A. Lenfest: The Accuracy of Linear Movement. (Harvard Psychological Studies, vol. 2, 1906.)
[37] Ranschburg: Ueber die Bedeutung der Ähnlichkeit beim Erlernen, Behalten und bei der Reproduktion. (Journal für Psychologie und Neurologie, vol. 6.) Ranschburg: Zeitschrift für Psychologie und Physiologie der Sinnesorgane. (Vol. 80, 1902.)
[38] H. Kleinknecht: The Interference of Optical Stimuli. (Harvard Psychological Studies, vol. 2, 1906.)
[39] The experiments are being conducted and will be published by Miss O.E. Martin.
[40] Henry P. Kendall: Unsystematized, Systematized, and Scientific Management. (In Addresses and Discussions at the Conference on Scientific Management held at Dartmouth College, 1912.)
[41] Ernst Abbé: Gesammelte Abhandlungen. (Jena, 1908, vol. 3, p. 206.)
[42] A full survey of the problem and its literature is contained in: Josephine Goldmark: Fatigue and Efficiency. (New York, 1912.)
[43] F.W. Taylor: The Principles of Scientific Management. (New York, 1911, p. 58.)
[44] W. Hellpach: Die geopsychischen Erscheinungen, Wetter, Klima und Landschaft und ihr Einfluss auf das Seelenleben (Leipzig, 1911 p. 176-212.)
[45] Aschaffenburg: Praktische Arbeit unter Alkoholwirkung (Psychologische Arbeiten—Kraepelin, vol 1, 1906.)
[46] Hildebrand Die Beeinflussung der Willenskraft durch den Alkohol (Königsberg, 1910.)
[47] For the scientific facts concerning alcohol and bibliography compare Hugo Hoppe: Die Tatsachen über den Alkohol (Munich, 1912.)
[48] H.L. Hollingworth: The Influence of Caffein on Mental and Motor Efficiency. (New York, 1912.)
[49] Levenstein: Die Arbeiterfrage. (Munich, 1912.)
[50] W.D. Scott: The Psychology of Advertising. (Boston, 1908, p. 166.)
[51] D. Starch: Psychology of Preferred Positions. (Judicious Advertising, New York, November, 1909.)
[52] C.T. Burnett: The Estimation of Number. (Harvard Psychological Studies, vol. 2, p. 349.)
[53] E.S. Rogers: The Unwary Purchaser: A Study in the Psychology of Trade Mark Infringement. (Michigan Law Review, vol. 8, 1910.)
[54] The experiments are being conducted and will be published by Mr. G.A. Feingold.
[55] W.D. Scott: Influencing Men in Business. (New York, 1911.)