7. Care should be taken to ascertain the correct age. This is often misstated both by young normal children and by defectives. The age should be recorded in years and months.
8. In ordinary calculation of the intelligence quotient without any mechanical aid (as slide rule, calculating chart, or table), both age and mental age should be reduced to months before dividing.
9. To avoid the danger of large error it is absolutely essential that the adding of credits to secure mental age and the dividing of mental age by chronological age to secure the intelligence quotient be performed twice.
10. Finally, in calculating the intelligence quotient of subjects who are more than sixteen years old, the chronological age should be counted as sixteen. It is possible, as certain army data suggest, that a lower age than sixteen should have been taken, but until the matter has been more thoroughly investigated by the use of unselected adult subjects the age sixteen will continue to be used in the Stanford Revision.
DIRECTIONS: THE TESTS2
2 Detailed directions for administering Stanford-Binet Scale and for scoring are available in Terman's The Measurement of Intelligence. (Riverside Textbooks in Education.) Houghton Mifflin Company.
Year III
1. Pointing to Parts of Body
Say, "Show me your nose." "Put your finger on your nose." If two or three repetitions of instructions bring no response, say, "Is this (pointing to chin) your nose?" "No?" "Then where is your nose?" Same for eyes, mouth, and hair.
Credit if correct part is indicated (in any way) three times out of four.