1898 — Leonard Carmichael was born. His contributions were in the areas of child psychology and biopsychology, with special emphasis on the importance of genetic determinants of behavior. Carmichael's Manual of Child Psychology (1946) was a milestone in the scientific treatment of human development. APA President, 1940.
1898 — Harry Helson was born. Helson's best known studies were in the areas of color vision and adaptation level theory, a general proposal that judgments of experience are relative to a reference point that shifts with past experience and current background stimuli. Society of Experimental Psychologists Warren Medal, 1959; APA Distinguished Scientific Contribution Award, 1962.
1899 — Alfred Binet joined and became advisor to La Société Libre Pour L'Étude Psychologique de L'Enfant (The Free Society for the Psychological Study of Children). Binet started publication of the society's Bulletin in 1900 and became president of the society in 1902. Both the society and its bulletin became major conduits of Binet's work. In 1917, the society was renamed La Société Alfred Binet and in 1961 it became La Société Alfred Binet et Thédore Simon.
1900 — Bluma Wulfomna Zeigarnik was born. The Zeigarnik effect is a principle of Gestalt psychology that describes the tendency for incomplete tasks to occupy one's attention.
1925 — In a letter to APA secretary John Anderson, Morton Prince offered to donate the Journal of Abnormal and Social Psychology to the APA. The transfer was completed on April 1, 1926.
1942 — Ignacio Martín-Baró was born. Martín-Baró was a social psychologist who promoted a culturally relevant science applied to the problems of Latin America. He founded the journal Revista de Psicologia de El Salvador. Martín-Baró was killed in 1989 by men in military uniforms during a raid on a Jesuit residence on a university campus in El Salvador.
1954 — The drug Doriden (glutethimide; Rorer) was approved for use by the U.S. Food and Drug Administration. Glutethimide is a nonbarbiturate hypnotic that suppresses the activity of the neurotransmitter acetylcholine. It is prescribed as an antianxiety medication.
1971 — The state of Massachusetts approved its psychologist licensure law.
1974 — James J. Jenkins's article "Remember That Old Theory of Memory? Well, Forget It!" was published in the American Psychologist.
1978 — The first Institute on Teaching Psychology to Undergraduates, organized by Frank Costin, was held at the University of Illinois at Champaign-Urbana. This series of annual conferences is now the National Institute on the Teaching of Psychology.
1987 — The first International Alzheimer's Conference began in Miami Beach, Florida.
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