5. The psychograph of a schoolboy, showing his standing in various mental functions; illustrating use of the circle as a diagram, the median circumference denoting the typical performance of his age 41 6. Showing how X improved as measured by Trabue’s “Language Scale A,” from Feb., 1918, to Dec., 1921 77–81 7. Showing X’s improvement in silent reading, from April 15, 1921, to Dec. 2, 1921, as measured by Thorndike-McCall “Reading Scale,” Form I 82–83 8. Showing X’s ability to get meaning from printed words, in May, 1922, as tested by Haggerty’s “Sigma 1,” for grades 1 to 3 84 9. Showing an account written by X of his week’s reading 86 10. Composition written at school by X in December, 1920, showing deficiencies in spelling 107 11. Letter written by X showing how he could spell by use of dictionary 108 12. Showing efforts to spell of a 14-year-old schoolboy, of IQ 93, after eight years of school instruction. Illustrating extreme dissociation of spelling ability from general intelligence 110 13. Showing spelling of a 12-year-old girl, of IQ 59, after six years of instruction. Illustrating extreme dissociation of spelling ability from general intelligence 111 14. Showing spelling of a child 9 years 10 months old, with IQ 143, after three years of instruction. Illustrating dissociation of spelling ability from general intelligence 112 15. Showing D’s calculations on Test 2, Army Alpha, Form 5, at the age of 10 years 11 months, five minutes being allowed for the performance 132 16. Showing D’s calculations on Test 6, Army Alpha, Form 5, at the age of 10 years 11 months, three minutes being allowed for the performance 133 17. Showing R’s calculations on Test 2, Army Alpha, Form 5, at the age of 7 years 6 months, five minutes being allowed for the performance 135 18. Showing R’s calculations on Test 6, Army Alpha, Form 5, at the age of 7 years 6 months, three minutes being allowed for the performance 136