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CHAPTER IV

Nature of the Stanford Revision and Extension 51

• Sources of data.
• Method of arriving at a revision.
• List of tests in the Stanford revision and extension.
• Summary of changes.
• Effects of the revision on the mental ages secured.

CHAPTER V

Analysis of one Thousand Intelligence Quotients 65

• The distribution of intelligence.
• The validity of the intelligence quotient.
• Sex differences.
• Intelligence of the different social classes.
• The relation of the I Q to the quality of the child’s school work.
• The relation between I Q and grade progress.
• Correlation between I Q and the teachers’ estimates of the children’s intelligence.
• The validity of the individual tests.

CHAPTER VI

The Significance of Various Intelligence Quotients 78

• Frequency of different degrees of intelligence.
• Classification of intelligence quotients.
• Feeble-mindedness.
• Border-line cases.
  • Examples of border-line deficiency.
• Dull normals.
• Average intelligence.
• Superior intelligence.
• Very superior intelligence.
  • Examples of very superior intelligence.
• Genius and “near” genius.
• Is the I Q often misleading?

CHAPTER VII

Reliability of the Binet-Simon Method 105

• General value of the method.