1928 · George Washington University · AAMCInteractive

The Moss test: medicine's first aptitude exam.

American medical schools were admitting students who never finished. F. A. Moss, a psychologist who had just qualified as a physician, built the “Scholastic Aptitude Test for Medical Students” at George Washington University with Thelma Hunt and Katharine Omwake. It was first given in 1928. The AAMC then backed it, and every school sat it on a single day in February 1931.

AAMC FIGURES · AS REPORTED JAN. 1931
Applicants a year≈15,000
Places available≈7,000+
Admitted who dropped out20%+
Test date, all schoolsFEB 13 1931
Annual figures for applicants to US and Canadian schools, from the Michigan Daily's report of the AAMC notice (18 Jan 1931).
1928 → 1931

Two years of trial forms, then one national date

The 1928 date is the first administration. The AAMC notice reported in January 1931 describes what came next: after two years of experimental work, a committee had a form that correlated well with success in the medical course. At a meeting in Denver the association voted to recommend it to member schools as an additional criterion, not a replacement for grades.

The rules were simple. Every institution with students applying to medicine would give it on the same day, once a year, and each medical school would get its applicants' scores plus a distribution chart.

The Michigan Daily · January 18, 1931
Medical school declines to require aptitude tests for 1931 freshmen

Frederick G. Novy, chair of the executive committee, said the committee had “not deemed it wise to make the tests a requirement,” though taking it would help anyone hoping to apply elsewhere.

Summary and one short quotation from the digitised page; headline paraphrased.
WHAT A TEST CAN DO TO ATTRITION · SIMULATED

Admit 7 in 15. How many still drop out?

Each dot is an applicant: test score across, later performance in medical school up. Schools take the top 47% by score (7,000 of 15,000); anyone below the red line drops out, which is 20% of applicants. Change how well the test predicts performance and see what happens to the dropout rate among those admitted.

ADMITTED →DROPS OUT ↓
← LOWER TEST SCOREHIGHER TEST SCORE →
TEST–PERFORMANCE CORRELATION
r = 0.4
Admitted at random20%
Admitted by test score11%
At r = 0.4, about 11% of those admitted would still drop out, against 20% with no test.
240 simulated applicants; the correlations are not Moss's. The real freshman dropout rate fell from about 20% (1925–30) to 7% by 1946, but stricter admissions and higher standards came in over the same years, so the test cannot take all the credit.
WHAT THE FORMS ASKED

Six to eight subtests per form, drawn from seven kinds

Questions were true-false and multiple choice. No source we found gives the order or timing of any one form, and the score scale changed from form to form. The AAMC's own history, quoted second-hand, gives a single norm-referenced total running from 0 to 385.

MEMORYVisual memoryLook at a picture, then answer questions about it once it is gone.
MEMORYMemory for contentRecall the substance of material studied a few minutes earlier.
VOCABULARYScientific vocabularyMeanings of scientific terms.
VOCABULARYScientific definitionsMatching definitions to terms.
READINGUnderstanding of printed materialComprehension of a passage read during the test.
KNOWLEDGEPremedical informationWhat a premedical student should already know.
REASONINGLogical reasoningListed among the topics; the least memory-based kind.

The memory-heavy design was criticised at the time for predicting only the first two, lecture-and-recall years of medical school.

VISUAL MEMORY · A RECONSTRUCTION

Study the bench for 10 seconds

Visual memory is one of the documented subtest kinds: the taker looks at a picture, it is taken away, and questions follow. Here the picture is a bench of glassware, followed by four questions from memory.

The scene was made for this page. We found no reproduced Moss items.
READY
The bench appears when you press start.
THE GEORGE WASHINGTON UNIVERSITY SERIES

The medical test was one of a set: Moss's group also tested teachers, salesmen and social intelligence

Pick a spine. The three people behind the series are below it.

Scholastic Aptitude Test for Medical StudentsThe medical test, built on the objective course examinations Moss had introduced at GWU from 1925. AAMC-recommended from 1930 and given nationally on 13 February 1931.Sources [1][3][5]
Fred August Moss1893–1966
Born in Tusquittee, North Carolina. Mercer BA 1913; Columbia MA 1921 under Edward Thorndike; GWU PhD 1922 on animal drives; MD 1927. Chaired GWU psychology 1927–34 and directed the AAMC's aptitude-test study.
Thelma Hunt1903–1992
Moss's doctoral student and co-author. She later chaired the department, directed GWU's Center for Psychological Service and wrote aptitude tests for nurses, firefighters and police.
Katharine T. OmwakeGWU
Named with Moss and Hunt as a builder of the medical test and a co-founder of the Center for Psychological Service. We found little else in print about her.
WHAT A SCORE MEANT, BY ERA

0–385, 200–800, 1–15, 3–45, 472–528

REFERENCES

Sources cited on this page

  1. [1]The Michigan Daily (18 January 1931), p. 2: report on the AAMC aptitude tests to be given 13 February 1931.Bentley Library textUsed for: Hero figures, test date, Denver vote, administration rules, Novy quote.
  2. [2]McGaghie, W. C. (2002). Assessing readiness for medical education: evolution of the Medical College Admission Test. JAMA, 288(9), 1085–1090.PubMedUsed for: 5–50% attrition range, 6–8 subtests and their focus, later phases.
  3. [3]Smedley, B. D., Stith Butler, A., & Bristow, L. R. (Eds.) (2004). In the Nation's Compelling Interest, ch. “Reconceptualizing admissions policies and practices.” National Academies Press.NCBI BookshelfUsed for: First administration 1928; 20% → 7% dropout alongside other reforms.
  4. [4]Wikipedia. Medical College Admission Test (history and format sections).en.wikipedia.orgUsed for: Seven subtest topics, contemporary criticism, 1946–2015 formats and score scales.
  5. [5]Wikipedia. Fred August Moss (citing GWU records, Columbia alumni register, AAMC reports).en.wikipedia.orgUsed for: Moss biography, Hunt and Omwake as co-builders, 1925 objective exams.
  6. [6]National Museum of American History. Psychological Test, Teaching Aptitude Test (Moss, Hunt & Wallace).si.eduUsed for: Five parts of the teaching test; Hunt's dates.
  7. [7]Cornell University Library, Rare and Manuscript Collections: test collection box 48 (Moss: Social Intelligence Test 1931–1955; Teaching Aptitude Test Form 1, 1927; Test for Ability to Sell Form 1, 1929).archives.library.cornell.eduUsed for: GWU series titles and dates.
  8. [8]Wikipedia. Thelma Hunt.en.wikipedia.orgUsed for: Center for Psychological Service, later aptitude tests.
  9. [9]Student Doctor Network forum (2008), quoting the AAMC's former online MCAT history.forums.studentdoctor.netUsed for: 0–385 score range only; second-hand, flagged in text.
EDITORIAL RECORD

What changed in this revision

Moss's committee reports in the AAMC journal (1932, 1936, 1939, 1941) exist but were not read for this revision. The 1931 newspaper page was read in full. MCAT is a registered mark of the AAMC.

  • CORRECTED“More than half of US medical students failing to finish.” Sources give 5–50% by school; the AAMC figure reported in 1931 was over 20% of those admitted.
  • CORRECTED“Six sections” in a fixed order with memory first. Sources give 6–8 subtests per form from seven kinds, with no fixed order documented.
  • REMOVED“3 hours,” “used with minor revisions,” “given at the applicant's own college,” and “~85,000 applicants a year.” None sourced. The same-day rule is now quoted from the 1931 report.
  • CORRECTED1946 name: “Professional School Aptitude Test” until 1948, not “Professional Aptitude Test for Medicine.”
  • ADDED1928 vs 1931 dating, the Michigan Daily account, selection simulator, GWU test series, Moss/Hunt/Omwake, score scale by era, 9 references.
  • KEPTThe visual-memory reconstruction, now labelled as one documented subtest kind rather than “Section 1.”
KEEP EXPLORING

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Part of the Historical IQ Tests Archive. Editorial content under CC BY-SA 4.0. No Moss or AAMC test items are reproduced.

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