Measure Your Mind: The Mentimeter and How to Use It

In Short

Measure Your Mind introduces the Mentimeter, a series of scientific intelligence tests designed to establish universal standards of mental capacity. Originating from wartime military classification and educational research, the text outlines how standardized testing can be applied across schools, commercial enterprises, and industrial plants. Through a sequence of standardized written and non-verbal exercises, it demonstrates methods for identifying mental ability, eliminating inefficiencies in training, and placing individuals where their natural intellect best serves society. The volume remains a key historical record of early twentieth-century applied psychology and the birth of mass standardized testing.

The Story

The volume opens by setting forth the core philosophy of applied psychology: true evaluation of human ability requires universal standards rather than simple peer-to-peer comparison. Just as an automobile's performance must be measured against set metrics of time and distance, human mental traits must be evaluated against established baselines gathered from thousands of participants. The narrative traces the evolution of these measuring tools, placing heavy emphasis on the massive psychological screening program conducted by the United States Army during World War I. Faced with millions of recruits, military authorities turned to standardized intelligence ratings to segregate the mentally incompetent, form units of uniform capability, and select candidates for specialized officer training.

Building upon this military precedent, the book shifts its focus to civilian life, advocating for the widespread adoption of group testing in education and business. In academic settings, the authors argue that standardized examinations should replace traditional memory-based entrance exams, allowing institutions to admit students based on inherent mental capacity rather than formal educational background. In the commercial realm, the text illustrates how employers can evaluate staff—such as large pools of office stenographers—against national performance averages to ensure maximum workplace efficiency and reduce turnover costs.

The middle section of the work functions as a practical manual and technical reference for administering the Mentimeter series. It covers thirty distinct tests categorized by language requirements and mental functions. Non-verbal examinations, including maze-threading and picture absurdities, cater to non-English speakers or illiterate candidates, while verbal and numerical tests measure reading comprehension, logical conclusions, word discrimination, and abstract reasoning. The authors detail specific administrative procedures, strict time limits, scoring keys, and standard stencils designed to allow clerical staff to grade results rapidly without clinical expertise.

In its final phase, the text moves into statistical methodology and verification. The authors guide the reader through mathematical formulas, such as the coefficient of coordination, to demonstrate how test scores correspond with real-world success, school grades, or supervisor efficiency ratings. The book concludes with complete scoring keys, correct answers, and standardized letter-grade classifications ranging from superior intellect to mental deficiency, asserting that systematic testing yields a fairer, more efficient society.

How It Unfolds

Establishing universal standards The work opens with an explanation of why human capacity must be gauged against universal benchmarks rather than local comparisons. Drawing parallels to physical measurements of speed and time, it argues that standardized metrics allow any individual to be evaluated accurately against national performance baselines.

The military experiment The focus shifts to the large-scale psychological testing conducted by the United States Army during World War I under Major Yerkes. The text details how intelligence ratings successfully processed over a million recruits to classify soldiers, select officer candidates, and weed out the mentally unfit.

Adapting tests to industry and schools The authors outline the transition of standardized testing into civilian institutions. They detail how colleges can use mental fitness tests in place of memorization-based entrance exams, and how business owners can evaluate clerical or industrial workers to eliminate inefficiency and match employee abilities to specific tasks.

Administering the Mentimeter tests A comprehensive guide introduces thirty specific Mentimeter examinations. The text provides exact administrative directions, script prompts, time limits, and non-verbal pantomime instructions for testing foreign-language speakers, covering tasks from maze-threading to word discrimination.

Calculating statistical validity The final chapters present the mathematical foundations used to verify test accuracy. The text demonstrates how to compute the coefficient of coordination, comparing test scores directly against supervisor ratings or workplace production metrics to prove the practical reliability of the system.

The People

M. R. Trabue An educational psychologist with Columbia University and former Chief Psychological Examiner in the U.S. Army who seeks to establish objective, scientific metrics for human intelligence. He works to replace subjective personal opinions with standardized psychological scales across schools and industries, ultimately providing the foundational research and methodology for the Mentimeter tests.

Frank Parker Stockbridge A journalist and author who aims to make complex scientific principles accessible to the general public. Utilizing his experience with war fund publicity and scientific journalism, he collaborates on the text to translate applied psychology into practical terms for business managers, educators, and general readers.

Robert M. Yerkes An Army Major who leads the Division of Psychology within the Medical Department during World War I. He seeks to prove the practical military value of psychological testing to a skeptical General Staff, eventually demonstrating that systematic intelligence classification significantly improves troop assignment and organizational efficiency.

The Employer A central operational figure who strives to maintain a productive workplace while minimizing labor costs. Constantly facing the challenge of identifying whether inefficient workers lack training or inherent capability, this figure relies on universal standard scores to compare internal staff performance against national industry averages.

In Its Own Voice

"The score in this test is the number of pictures in which the absurd element has been identified and checked."

This directive outlines the grading process for a visual reasoning test designed to evaluate fundamental observation skills.

"There is a distinct tendency for candidates to try to glance at the pages which follow unless specific directions are given as the papers are distributed that this must not occur."

The authors instruct examiners on maintaining strict control over testing conditions during group administrations.

"A child should be allowed to undertake that work for which he is fitted by nature and intellectual capacity, regardless of what his past academic training may have been."

This passage asserts the authors' core philosophy regarding educational placement based on inherent capacity over formal schooling.

What It's Really About

Measure Your Mind presents an argument for structuring society around measurable human intellect. The book posits that innate mental capacity is quantifiable, fixed, and directly linked to real-world performance. By replacing subjective appraisals with objective, standardized testing, the authors contend that educational and commercial institutions can operate with peak efficiency. The work addresses fundamental questions regarding human capability, labor optimization, and the fair distribution of opportunity. It argues that individuals are best served when assigned to roles matching their natural intellectual boundaries, viewing psychological measurement as a tool to eliminate economic waste, streamline industrial production, and direct individuals toward their appropriate station in modern society.

Why Read It Today

Measure Your Mind offers a fascinating historical look at the origins of modern standardized testing and applied psychology. Readers interested in history, education, or sociology will appreciate its direct look into early twentieth-century attempts to categorize human intelligence on a industrial scale. The text reads like an practical manual, blending accessible prose with historical data, test booklets, and statistical formulas.

The primary difficulty for contemporary readers lies in the historical terminology and rigid period attitudes toward intellectual classification, particularly regarding social hierarchy and mental deficiencies. Modern audiences will readily spot the cultural biases embedded within early general knowledge questions—which demand familiarity with period slang, pop culture, and specific trades—as well as the strict utilitarian view of human labor. Despite these outdated perspectives, the book remains a transparent, primary-source window into how psychological testing was popularized and integrated into American business and schooling following World War I.