LIST OF TABLES AND FIGURES

Tables

I. Age distribution of deaths in the general population and of feeble-minded in institutions 30

II. Mortality of institutional deficients in the United States compared with the general population 31

III. Test borderlines with randomly selected Minneapolis 15-year-olds 89

IV. Results with the Binet tests for mental ages XI and XII (1908 series) 98

V. Percentages of mentally retarded children as tested with the Binet 1908 Scale 106

VI. Mental retardation of children as tested with the Binet 1911 Scale 111

VII. Borderlines with the Point Scale 115

VIII. Test ages of the Glen Lake group of delinquent boys 124

IX. Intellectual development relative to life-ages and school positions among the delinquent boys of Glen Lake 125

X. Binet 1911 tests of boys consecutively admitted to the Detention Home at Thorn Hill, Allegheny County 151

XI. Frequency of tested deficiency among over 9000 delinquents 159

XII. Age and grade distribution of elementary school pupils in Minneapolis 178

XIII. School retardation of Minneapolis delinquents and elementary school pupils 179

XIV. Indices of frequency and amount of school retardation for Minneapolis delinquents and elementary school pupils 183

XV. Percentage of pupils 12 and 13 years of age most seriously retarded in school 193

XVI. School position of delinquents at Glen Lake relative to their intellectual development 204

xivXVII. Goring's data as to the percentage of mental defectives among men convicted of various offenses 213

XVIII. Goring's data as to groups of crimes committed most frequently by those mentally deficient 214

XIX. Four-fold correlation table for juvenile delinquency and deficiency in Minneapolis 222

XX. Average Intelligence Quotients of children of different ability 296

XXI. Test records with random 15-year-olds 344

XXII. Test records with delinquents at the Glen Lake Farm School 349

Figures

1. Mortality among feeble-minded in institutions compared with the general population 32

2. School retardation of Minneapolis delinquents compared with elementary school boys 180

3. Hypothetical development curves (normal distributions) 253

4. The question of equivalence of year units 265

5. Hypothetical development curves (changing form of distribution.) 277

6. Tests of the development of memory processes. Medians at each age for the central tendencies of the tests 285

7. Different types of development. Medians at each age for the central tendencies of the tests 286

8. Forty tests of development. Distribution at each age for the central tendencies of the tests 287

9. Relative positions at each age of the median and of corresponding bright and retarded children with the Form Board Test 299

DEFICIENCY AND DELINQUENCY

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