The measurement of intelligence — Background and Themes

Precision in Procedure

Terman's manual is remarkable for its exacting detail. For the coin-naming test, he specifies the order of presentation—nickel, penny, quarter, dime—and allows provincialisms like "two bits" for the quarter. He instructs examiners to count the child's second answer if they change their response, and to ask no supplementary questions. The scoring for the sentence-repetition test is equally precise: one sentence repeated without error, or two with no more than one error each, where an error is defined as an omission, insertion, or transposition. Faults of pronunciation are overlooked, but the exact language must be reproduced.

These rules reflect Terman's insistence on standardization. He warns against re-reading sentences for six-year-olds, though he allows a single repetition for younger children to overcome timidity. The responses must be recorded verbatim, a task made easier by having the sentences printed on record blanks. This level of procedural control aims to minimize variability between examiners and ensure that results are comparable across settings.

Defending Tests Against Environmental Critique

Terman directly addresses critics who argue that the coin-naming test is culturally biased. He acknowledges that "the ability to identify pieces of money depends entirely on instruction or other accidents of environment," but then presents data showing that children from poor homes actually perform slightly better than those from wealthy homes. He concludes that by age six, nearly all children have had opportunity to learn coin names, and failure indicates a lack of "spontaneity of interest in things"—a fundamental presupposition of intelligence.

This argument reveals Terman's core assumption: intelligence is an innate capacity that manifests through spontaneous engagement with the environment, not merely through formal instruction. He contrasts this with "mechanical memory," suggesting that the test measures something deeper. The defense is notable for its reliance on empirical data—the figures showing minimal environmental influence—and for its willingness to engage with opposing views, a pattern that recurs throughout the manual.

The Tension Between Standardization and Flexibility

Throughout the excerpts, Terman balances rigid standardization with pragmatic flexibility. He allows examiners to praise a child's efforts after a poor response, and to repeat a sentence once for timid younger children. The scoring for sentence repetition includes a partial-credit option: two sentences with one error each count as a pass. These accommodations acknowledge the realities of testing young children, where anxiety can affect performance.

Yet Terman is uncompromising on other points. The exact wording must be repeated; the thought alone is insufficient. For the coin test, no supplementary questions are permissible. This tension reflects the broader challenge of intelligence testing: how to obtain reliable, comparable data while accounting for the variability of human subjects. Terman's solution is to specify every allowable deviation, creating a protocol that is both strict and adaptable.

Readers approaching this manual should attend to the interplay between Terman's scientific aspirations and his practical compromises. The book is not merely a set of instructions but a document of early twentieth-century psychology's efforts to quantify human potential. Pay particular attention to the remarks sections, where Terman defends his choices and acknowledges limitations. These passages reveal the assumptions underlying the Stanford-Binet scale and the debates that continue to surround intelligence testing today.

I have held Terman’s manual for decades, and still I wonder at its careful measuring of young minds, so sure of itself. It makes me think of an older uncertainty, the patient, questioning scholars in Life in the Medieval University — A Reader’s Guide. Both books ask what learning leaves behind—yet one counts, the other merely waits. A quiet kinship of hope.