Mental defectives, detection of, 75 education of, 14 in industry, 75, 213 menace of, 77 vocational aptitudes of, 208, 213 Motives of vocational psychology, 1 bibliography on, 275 Norms of performance, 61, 66 ff., 73, 79, 91, 94, 285-293 bibliography on, 276 Occupations, analysis of, 92, 96 ff., 102, 103, 208 ff. blind alley, 16, 210, 218 Periodicity effect of, on mental and motor ability, 234 ff. Photographs, experiments with, 41, 48 judgments of, 41, 47, 48 vocational use of, 48, 52 Phrenology, assumptions of, 26 errors of, 27-32 origin of, 23 practice of, 25 Physiognomies, analysis of, 34 dogmas of, 39 experiments in, 41, 49, 53 practice of, 32 vocational futility of, 54 Practice, effect of, on individual differences, 257 ff. limits of, 256 on correlation of abilities, 247 Primitive thinking, examples of, 3 stages of, 2 ff. vocational efforts of, 2 Product scales, bibliography on, 276 nature and use of, 74 Psychograph, bibliography on, 277 nature of, 80, 88 of individuals, 80 of a mathematician, 81 ff. of a novelist, 86 of occupation, 90, 97, 98, 102 of a singer, 92 vocational use of, 96, 99, 107 Psychological tests, bibliography on, 276 method of, 61 of adults, 210, 248 of children, 69, 114 of clerical workers, 110, 111 Psychological tests, of college students, 60, 145 of efficiency experts, 78 of factory operators, 111, 115 of judges, 111 of marine officers, 112 of motormen, 112 of musical ability, 94 of Poincare, 81 ff. of a singer, 92 of stenographers, 113 of salesmen, 111 of telephone operators, 110, 112 of typesetters, 111 of typewriters, 113, 114 of Zola, 86 origin and history of, 57 ff. samples of, 284-300 scales of, 67 ff. standardization of, 63, 67 sources of, and instructions for, 300-302 tests of, 64 theory of, 245 ff. vocational use of, 60, 66, 75, 78, 80 ff., 90, 109-121, 210, 218, 261 Scales, bibliography on, 276 for measuring intelligence, 67 for measuring special achievement, 74 ff. samples of, 285-293 use of, 75 School records, as indicative of interests, 190 ff. as related to later academic achievement, 177 ff. School records, as related to success in later life, 192 ff. bibliography on, 279 correlation of, with tests, 165 intercorrelation of, 172 vocational significance of, 174 ff. Selection, of an occupation, 12 ff., 102, 104, 123 of employees, 53, 75, 78, 99, 110-113, 115, 133, 210, 211, 219, 240 Self-analysis, bibliography on, 278 method of, 122 problems of, 124 reliability of, 149 ff. systematic guides to, 125-133 Sex differences, bibliography on, 280 in average intelligence, 225 ff. in instinctive equipment, 237 in physiological function, 242 in special handicaps, 234 in variability, 228 ff. in vocational opportunity, 240 ff. Testimonials, 142, 173 Tests. _See_ Psychological tests Theory, bibliography on, 281 of mental tests, 245