296 TABLE OF CONTENTS. 



Page. 



Chapter 8. Revision of methods of individual examination 397 



Sec. 1. Original group of methods for individual examination 397 



Sec. 2. Adoption of the Yerkes-Bridges point scale and the Stanford-Binet scale 398 



Sec. 3. The performance scale 400 



Sec. 4. Abbreviation of the Stanford-Binet scale 407 



Sec. 5. Abbreviation of the Yerkes-Bridges point scale 411 



Chapter 9. Effect of doubling the time limits in the alpha and beta examinations 415 



Chapter 10. The assignment of letter ratings 421 



Sec. 1. Examinations a and alpha 421 



Sec. 2. Examination for illiterates 422 



Sec. 3. Individual examinations 422 



Sec. 4. Explanation of letter ratings to commanding officers 423 



Chapter 11. Performance in intelligence examinations as related to officers' estimates of intelligence 425 



Sec. 1. Alpha and beta and intelligence ratings 425 



Sec. 2. Examination a and intelligence ratings 450 



Chapter 12. Performance in intelligence examinations as related to military efficiency 453 



Sec. 1. Examination alpha 453 



Sec. 2. Examination beta 466 



Chapter 13. Conditions of examining and procedures adopted during the initial experiment 469 



Sec. 1. Character of groups examined 469 



Sec. 2. Conditions within the cantonments 470 



Sec. 3. Description of procedure in examination 471 



Sec. 4. Segregation of various grades of illiterates 472 



Sec. 5. Testing semiliterates, illiterates and non-English speaking recruits 475 



Sec. 6. Individual examinations — low-grade men 477 



Sec. 7. Group tests for literates 480 



Sec. 8. Special studies conducted in the camps 483 



Sec. 9. Work of the clerical staff 484 



Sec. 10. Summary of camp activities 484 



Chapter 14. Summary of data concerning groups examined 487 



Sec. 1. Limitations affecting consideration of results 487 



Sec. 2. Comparison of camps, enlisted men 488 



Sec. 3. Additional data regarding enlisted men, by camps 491 



Sec. 4. Comparison of branches of the service 494 



Sec. 5. Comparison of organizations (regiments and companies) 497 



Sec. 6. Comparison in terms of military status 504 



Sec. 7. Data concerning negro troops 528 



Chapter 15. Additional statistics on examination a , 533 



Sec. 1. Distributions of scores for the separate tests of examination a 533 



Sec. 2. Forms for examination a by age, mental age, and school grade 536 



Sec. 3. Correlations of tests of examination a 539 



Sec. 4. Practice effects in examination a 541 



Sec. 6. Equivalence of forms, examination a 544 



