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The term “Mental Tests” was coined by James Cattell, beginning the specialization in psychology now known as psychological assessment.
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The British Psychological Society was founded.
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Robert Yerkes developed the Army Alpha and Beta Tests to measure intelligence in a group format. The tests were adopted for use with all new recruits in the U.S. military a year later.
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Leon Festinger proposed his theory of ‘Cognitive Dissonance’ and later became an influence figure in Social Psychology.
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American Psychological Society established.
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New Mexico becomes the first state to pass legislation allowing licensed psychologists to prescribe psychotropic medication