Lloyd Humphreys

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Lloyd G. Humphreys
Born(1913-12-12)December 12, 1913
DiedSeptember 7, 2003(2003-09-07) (aged 89)
NationalityAmerican
Alma materUniversity of Oregon
Indiana University
Stanford University
Scientific career
FieldsPsychology

Lloyd Girton Humphreys (December 12, 1913 – September 7, 2003) was an American differential

intelligence research, and he received awards in this field.[1]

Early life and education

Born in

dissertation on the partial reinforcement effect
(or the Humphreys effect), is considered a classic in the field.

Career

His first position was at

University of Illinois at Urbana-Champaign
(1957–1984).

Humphreys argued that much psychological research fails to replicate because of inadequate

sample sizes, because correlations fluctuate when Ns are small. His own empirical research typically involved large-scale longitudinal studies such as Project Talent.[2]

In the 1970s, Humphreys chaired the

intelligence test
"the single most important test that can be administered for vocational guidance purposes" (Humphreys, 1985, p. 211). He also coined the concept "inadequate learning syndrome" (ILS) and argued it was a more important social problem than the AIDS epidemic (Humphreys, 1988).

Amid the controversy generated by publication of

Wall Street Journal, which defended the findings on intelligence in The Bell Curve
.

Selected works

  • Humphreys LG (1939). The effect of random alternation of reinforcement on the acquisition and extinction of conditioned eyelid reactions. Journal of Experimental Psychology, 25, 141–158.
  • Humphreys, L. G. (1985). General intelligence: An integration of factor, test, and simplex theory. In B. B. Wolman (Ed.), Handbook of intelligence ( pp. 201–224). New York: Wiley.
  • Humphreys, L. G. (1988). Trends in levels of academic achievement of blacks and other minorities. Intelligence, 12, 231–260.
  • Humphreys, L. G. (1994). Intelligence from the standpoint of a (pragmatic) behaviorist. Psychological Inquiry, 5, 179–192.

References

  1. ^ Lubinski D (2004). Lloyd G. Humphreys: Quintessential Scientist (1913–2003). (PDF Intelligence, 32, 221–226.
  2. ^ Flanagan, J. C., Dailey, J. T., Shaycoft, M. F., Gorham, W. A., Orr, D. B., & Goldberg, I. (1962). Design for a study of American youth. Boston, MA: Houghton Mifflin.
  3. Wall Street Journal
    , p A18.
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