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Three of The Most Important People in Science:

In the Last 100 Years...



  1. Leon Festinger (1919 -1990) contributed a large number of theories and concepts to the field of social psychology. One of his most important ideas was the Theory of Cognitive Dissonance. Cognitive Dissonance refers to a state of psychological tension that is aroused when a person holds two or more ideas or thoughts-cognitions-that are contradictory to each other.

    More about: Leon Festinger
    More about: The Theory of Cognitive Dissonance

  2. Sigmund Freud (1856 -1939) was a creative thinker who leapt outside the mainstream of academic research and thought with his work and ideas. One of his most important contributions to the psychological community was his theory of psychoanalysis, which he developed while he was working as a practicing physician who specialized in neurology.

    More about: Sigmund Freud
    More about: Psychoanalysis

  3. Dmitri Ivanovich Mendeleev (1834 -1907) was a Russian chemist whose early research centered on the study of the physical properties of liquids and gases, this may have lead to his development of the most common periodic table. Our modern Periodic Table of Elements is based upon Mendeleev's earlier version.

    More about: Dmitri Mendeleev
    More about: The Periodic Table of Elements

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