Karl Duncker

Karl Duncker (February 2, 1903 in Leipzig — February 23, 1940) was a representative of the Gestalt Theory of psychology. He attended Friedrich-Wilhelms-University from 1923 to 1923, spent 1925-1926 at Clark University in Worcester, MA as a visiting professor, where he received a masters in arts degree. Until 1935 he was a student and assistant of the founders of Gestalt psychology in Berlin: Max Wertheimer, Wolfgang Köhler and Kurt Koffka. In 1935, exiled by the Nazis, he got an assistantship in Cambridge with Frederic Charles Bartlett and later emigrated to the USA where he was again an assistant of Wolfgang Köhler’s at Swarthmore College. He committed suicide at 37 years of age.

Achievements

Duncker coined the term functional fixedness for describing the difficulties in visual perception and in problem solving that arise from the fact that one element of a whole situation already has a (fixed)function which has to be changed for making the correct perception or for finding the solution to the problem.

The candle problem (Karl Duncker, 1945).

In his “candle problem” the situation was defined by the objects: a box of candles, a box of thumb-tacks and a book of matches. The task was to fix the candles on the wall without any additional elements. The difficulty of this problem arises from the functional fixedness of the candle box. It is a container in the problem situation but must be used as a shelf in the solution situation.

Other examples for this type of mental restructuring are:

• an electromagnet must be used as part of a pendulum
• a branch of a tree must be used as a tool
• a brick must be used a paper weight
• another meaning of a word must be found that is different from the meaning within the context of the sentence

Publications

• Duncker, Karl (1926). "A qualitative (experimental and theoretical) study of productive thinking (solving of comprehensible problems)". Pedagogical Seminary and journal of genetic psychology. 33. Worcester, Mass.: Clark University: 642–708. ISSN 0885-6559. OCLC 1590585.

• Duncker, Karl (1929). "Über induzierte Bewegung (Ein Beitrag zur Theorie optisch wahrgenommener Bewegung)". Psychologische Forschung. 12. Springer-Verlag: 180–259. doi:10.1007/BF02409210. ISSN 0033-3026. OCLC 1069713. {{cite journal}}: Unknown parameter |month= ignored (help); Unknown parameter |trans_title= ignored (|trans-title= suggested) (help)

• Duncker, Karl (1932). "Behaviorismus und Gestaltpsychologie". Erkenntnis. 3. Springer Netherlands: 162–176. doi:10.1007/BF01886416. ISSN 0165-0106. {{cite journal}}: Unknown parameter |month= ignored (help); Unknown parameter |trans_title= ignored (|trans-title= suggested) (help)

• Duncker, Karl (1935). Zur psychologie des produktiven denkens. Springer. OCLC 6677283. {{cite book}}: Invalid |nopp=135 (help); Unknown parameter |nopp= ignored (|no-pp= suggested) (help); Unknown parameter |trans_title= ignored (|trans-title= suggested) (help)

• Duncker, Karl (1936). "Lernen und Einsicht im Dienst der Zielerreichung". Acta Psychologica. 1. The Hague: Martinus Nijhoff, Elsevier Science B.V.: 77–82. doi:10.1016/S0001-6918(36)90037-9. ISSN 0001-6918. OCLC 1447968. {{cite journal}}: Cite has empty unknown parameter: |month= (help); Unknown parameter |trans_title= ignored (|trans-title= suggested) (help)

• Duncker, Karl (1937). "Some preliminary experiments on the mutual influence of pains". Psychologische Forschung. 21 (1). Springer-Verlag: 311–326. doi:10.1007/BF02441209. ISSN 0033-3026. OCLC 1069713. {{cite journal}}: Unknown parameter |month= ignored (help)

• Duncker, Karl (1938). "Experimental modification of children's food preferences through social suggestion". Journal of Abnormal and Social Psychology,. 33 (4). American Psychological Association: 489–507. doi:10.1037/h0056660. {{cite journal}}: Unknown parameter |month= ignored (help)CS1 maint: extra punctuation (link)

• Duncker, Karl (1939). "The influence of past experience upon perceptual properties". American journal of Psychology. 52. University of Illinois Press: 255-265. ISSN 0002-9556. OCLC 1408768. {{cite journal}}: Unknown parameter |month= ignored (help)

• Duncker, Karl (1939). "Ethical Relativity? An enquiry into the psychology of ethics". Mind. 48 (189). Oxford University Press: 39–57. doi:10.1093/mind/XLVIII.189.39. ISSN 0026-4423. OCLC 1594357.

• Duncker, Karl; Krechevsky, I. (1939). "On solution-achievement". Psychological Review. 3. American Psychological Association: 162–176. doi:10.1037/h0060101. ISSN 0033-295X. {{cite journal}}: Unknown parameter |month= ignored (help)

• Duncker, Karl (1941). "On pleasure, emotion, and striving". Philosophy and Phenomenological Research. 1. International Phenomenological Society: 391–430. {{cite journal}}: Unknown parameter |month= ignored (help) (also online at The International Society for Gestalt Theory and its Applications)

• Duncker, Karl (1945). On problem solving. Psychological monographs. Vol. 58. American Psychological Association. OCLC 968793. {{cite book}}: Invalid |nopp=112 (help); Unknown parameter |nopp= ignored (|no-pp= suggested) (help)

See also

• Schnall, S. (2007). Life as the problem: Karl Duncker's context. In "Thinking in psychological science: ideas and their makers" (editor: Jaan Valsiner), Transaction Publishers, 2007.
• Insights into Life: The Drama of Karl Duncker: collection of papers by Simone Schnall; Herbert A. Simon; Jeanette A. Lawrence & Agnes E. Dodds; Kurt Fischer & Jeffrey Stewart