On This Day … 24 January [2023]

People (Births)

  • 1850 – Hermann Ebbinghaus, German psychologist (d. 1909).
  • 1853 – Sigbert Josef Maria Ganser, German psychiatrist (d. 1931).

Hermann Ebbinghaus

Hermann Ebbinghaus (24 January 1850 to 26 February 1909) was a German psychologist who pioneered the experimental study of memory, and is known for his discovery of the forgetting curve and the spacing effect. He was also the first person to describe the learning curve. He was the father of the neo-Kantian philosopher Julius Ebbinghaus.

Sigbert Josef Maria Ganser

Sigbert Josef Maria Ganser (24 January 1853 to 4 January 1931) was a German psychiatrist born in Rhaunen.

He earned his medical doctorate in 1876 from the University of Munich. Afterwards he worked briefly at a psychiatric clinic in Würzburg, and later as an assistant to neuroanatomist Bernhard von Gudden (1824-1886) in Munich. In 1886, he became head of the psychiatric department at Dresden General Hospital. Among his students was neurologist Hans Queckenstedt (1876-1918).

Sigbert Ganser is remembered for a hysterical disorder that he first described in 1898. He identified the disorder in three prisoners while working at a prison in Halle. The features included approximate or nonsensical answers to simple questions, perceptual abnormalities, and clouding of consciousness. Ganser believed that these symptoms were an associative reaction caused by an unconscious attempt by the patient to escape from an intolerable mental situation. The disorder was to become known as Ganser syndrome.

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