Sidney L. Pressey

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Sidney Leavitt Pressey (Brooklyn, New York, December 28, 1888 – July 1, 1979) was Professor of Psychology at Ohio State University for many years. He is famous for having invented a teaching machine many years before the idea became popular.

"The first.. [teaching machine] was developed by Sidney L. Pressey... While originally developed as a self-scoring machine... [it] demonstrated its ability to actually teach".[1]

Pressey joined Ohio State in 1921, and stayed there until he retired in 1959. He continued publishing after retirement, with 18 papers between 1959 and 1967.[2] He was a cognitive psychologist who "rejected a view of learning as an accumulation of responses governed by environmental stimuli in favor of one governed by meaning, intention, and purpose".[2] In fact, he had been a cognitive psychologist his entire life, well before the "mythical birthday of the cognitive revolution in psychology".[3]

The 'teaching machine'[edit]

Pressey's idea started as a machine for administering multiple-choice questions (MCQs) to students. MCQs were (and are still) a basic method for testing students in the United States. Pressey's machine had a window with a question and four answers. The student pressed the key to the chosen answer. The machine recorded the answer on a counter to the back of the machine, and showed the next question.

The great idea was to fix the machine so that it would not move on until the student chose the right answer. Then it was easy to show that this second arrangement taught the students which were the right answers. This was the first demonstration that a machine could teach, and also a demonstration that knowledge of results was the cause of the learning.[4][5][6] This kind of feedback to the learner is basic: it just tells the learner whether they are right or not. Later work on other kinds of learning material showed that even better results were got when the feedback contained more explanatory material.[7][8]

Pressey continued to improve his devices after World War II,[9] and the papers of Pressey and his colleagues are reprinted in a leading sourcebook.[10]

A number of reviews credit Pressey with being the originator of teaching machines, and of important aspects of programmed learning. This was long before the better known efforts of B.F. Skinner.[11][10][12] The review by Klaus gave a special appreciation of Pressey and his work.[13] Skinner, who was responsible for bringing the whole subject into popular view, acknowledged Pressey's work in his 1958 paper on teaching machines.[14][15]

Pressey's own term was "adjunct autoinstruction". He thought it important to follow learning by questions "to enhance the clarity and stability of cognitive structure by correcting misapprehensions, and deferring the instruction of new matter until there had been such clarification and elucidation".[16] The topic itself might be programmed, or it might not.[17]

Pressey's major textbook[edit]

Pressey's major textbook Psychology and the new education, 1937 and 1944,[18] is a prototypical cognitive text for student teachers. He writes (p369) of a diagnostic attack on teaching problems:

"For example, analysis of error, and remedial work based on the analysis, was found to improve greatly the mastery of algebra.[19] In another experiment, individualization and diagnosis caused great improvement, as shown by actual performance, in the mastery of vocational agriculture".[20]

Pressey goes on to quote more published examples, and gives the data from some of these studies. The whole of chapter 10, The nature and control of the learning process, is directly relevant to the ideas of programmed learning which developed after World War II in the United States.

Pressey's whole approach to educational psychology ran in opposition to the influence of B.F. Skinner and the behaviorists, as this quotation illustrates:

"The archvillain, leading so many people astray, is declared to be learning theory! No less a charge is made than that the whole trend of American research and theory as regards learning has been based on a false premise—that the important features of human learning are to be found in animals. Instead, the all-important fact is that humans have transcended animal learning. Language, number, such skills as silent reading, make possible facilitations of learning, and kinds of learning, impossible even for the apes, Autoinstruction should enhance such potentials. Instead, current animal derived procedures in autoinstruction destroy meaningful structure to present material serially in programs, and replace processes of cognitive clarification and largely rote reinforcements of bit learnings".[21]

Books by Pressey[edit]

  • Pressey S.L. & Pressey L.C. 1923. Introduction to the use of standard tests. Harrap.
  • Pressey S.L. & Pressey L.C. 1927. Mental abnormality and deficiency. Macmillan.
  • Pressey S.L. 1933. Psychology and the new education. Harper.
    • Pressey S.L. & Robinson F.P. 1944. Psychology and the new education. Revised edition, Harper.
  • Pressey S.L. & Janney J.E. 1937. Casebook of research in education. Harper.
  • Pressey S.L; Janney J.E. & Kuhlen R.G. 1939. Life: a psychological survey. Harper.
  • Pressey S.L. & Kuhlen R.G. 1957. Psychological development through the life span. Harper & Row.
  • Pressey S.L; Robinson F.P & Horrocks J.E. 1959. Psychology in education. Harper.


  • Pressey, Sidney L. 1967. Autobiography. In A history of psychology in autobiography, vol 5. eds Edward G. Boring and Gardner Lindzey. New York: Appleton-Century-Croft.
  • Pressey, Sidney L. 1971. Sidney Leavitt Pressey, Part I: An autobiography. In Leaders in American education, ed. Robert J. Havighurst. Chicago: University of Chicago Press.


  1. ^ Hilgard E.R. & Bower G.H. 1966. Theories of learning. 3rd ed, New York:Appleton-Century-Crofts. Chapter 16: Learning & the technology of instruction, 554–561 Programmed learning.
  2. ^ a b Anderson, Lorin W. 2002. Pressey, Sidney L. (1888–1979). In Encyclopedia of Education. [1]
  3. ^ Bruner, Jerome S. 1992. Another look at New Look 1. American Psychologist. 47, 780–783.
  4. ^ Pressey S.L. 1926. A simple apparatus which gives tests and scores – and teaches. School and Society, 23 (586), 373–376.
  5. ^ Pressey S.L. 1927. A machine for automatic teaching of drill material. School and Society, 25 (645), 549–552.
  6. ^ Pressey S.L. 1932. A third and fourth contribution toward the coming "industrial revolution" in education. School and Society, 36 (934), 668–672.
  7. ^ Lumsdaine A.A. 1965. Experimental results on instructional devices and materials. In Glaser R. (ed) Training research and education. New York: Wiley, especially 258–266.
  8. ^ Annett J. 1964. The role of knowledge of results in learning: a survey. In Educational Technology, De Cecco (ed), Holt, Rinehart & Winston, 279–285.
  9. ^ Pressey 1950. Development and appraisal of devices providing immediate automatic scoring of objective tests and concomitant self instruction. Journal of Psychology, 29, 417–447.
  10. ^ a b Lumsdaine A.A & Glaser R. (eds) 1960. Teaching machines and programmed learning: a source book. Washington D.C. National Education Association.
  11. ^ Lumsdaine A.A. 1963. Instruments and media of instruction. In N.L. Gage (ed) Handbook of research on teaching. Chicago: AERA and Rand McNally, 592 (auto-instructional methods), 620 (differential feedback).
  12. ^ Crowder N. 1959. Automatic tutoring by means of intrinsic programming. In Galanter E.H. (ed) Automatic teaching: the state of the art. New York: Wiley, 109–116.
  13. ^ Klaus D.J. 1965. Analysis of programming techniques. In Glaser R. (ed) Teaching machines and programmed learning II: data and directions. Washington D.C. Department of Audiovisual Instruction, National Education Association, 144–147.
  14. ^ Skinner B.F. 1958. Teaching machines. Science 128, 969–977, reprinted in Skinner 1965.
  15. ^ Skinner B.F. 1965. The technology of teaching. Appleton-Century-Croft. Includes reprints of Skinner's earlier papers on programmed learning, and discusses the limitations of classroom teaching in several places, such as chapter 5 Why teachers fail, and chapter 10 A review of teaching.
  16. ^ Pressey S.L. 1951. Teaching machines (and learning theory) crisis. J. Applied Psychology 47, 1-6.
  17. ^ Pressey S.L. 1964. Auto elucidation without programming. NSPI Journal 3, 12-13.
  18. ^ Pressey S.L. 1933. Psychology and the new education. Harper, and Pressey S.L. & Robinson F.P. 1944. Psychology and the new education. Revised edition, Harper.
  19. ^ Tucker G.E. 1932. An evaluation of remedial teaching in algebra. Educational Trends 1, 29–33.
  20. ^ Roberts R.W. 1932. A further study in individualized instruction. Journal of educational research. 25, 261–266.
  21. ^ Pressey S.L. 1963. Autopresentation vs. autoelucidation. Programmed instruction 2, 6–7.