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Wolfgang Köhler (22 January 1887 – 11 June 1967) was a German psychologist and phenomenologist who, like Max Wertheimer, and Kurt Koffka, contributed to the creation of Gestalt psychology.

Early life

Köhler was born in the port city of Reval (now Tallinn), Governorate of Estonia, Russian Empire. His family was of German origin, and shortly after his birth, they moved back to that country. There, raised in a setting of teachers, nurses and other scholars, he developed lifelong interests in the sciences as well as the arts, and especially in music.


In the course of his university education, Köhler studied at the University of Tübingen (1905–06), the University of Bonn (1906–07) and the University of Berlin (1907–09). While a student at the latter, he focused on the link between physics and psychology, in the course of which he studied with two leading scholars in those fields, Max Planck and Carl Stumpf, respectively. In completing his Ph.D., for which his dissertation addressed certain aspects of psychoacoustics, Stumpf was his major professor.

Gestalt psychology

In 1910-13, he was an assistant at the Psychological Institute in Frankfurt in which he worked with fellow psychologists Max Wertheimer and Kurt Koffka. He and Koffka functioned as subjects for Wertheimer's now-famous studies of apparent movement (or the phi phenomenon), which led them in turn to conclusions about the inherent nature of vision. They collaborated on the founding of a new holistic attitude toward psychology called Gestalt theory (from the German word for "whole"), aspects of which are indebted to the earlier work of Stumpf (Köhler's teacher) and Christian von Ehrenfels (whose lectures at the University of Prague Wertheimer had attended). In an introduction to the book The Task of Gestalt Psychology, Carroll Pratt emphasizes Köhler's irritation regarding a misinterpretation of his famous quote, "The whole is different from the sum of its parts". Though perhaps a simple error made in translation, many lectures in textbooks of modern-day psychology quote Gestalt theory by saying "the whole is greater than the sum of its parts". It is difficult to imagine that a translation error occurred here, especially when considering that 'greater' translates to 'größer' and 'different' translates to 'unterschiedlich' in German, respectively. Considering Köhler's frustration towards this error, one must assume that these two minor variations of the quote harness different meanings. When the word 'greater' is used, it implies that the whole still resembles the parts that created it. However, when the word 'different' is used, as Köhler originally stated, it implies that the whole bears no resemblance to the parts creating it.

Problem solving

In 1913, Köhler left Frankfurt for the island of Tenerife in the Canary Islands, where he had been named the director of the Prussian Academy of Sciences anthropoid research station. He remained there for six years, during which he wrote a book on problem solving titled The Mentality of Apes (1917). In this research, Köhler observed the manner in which chimpanzees solve problems, such as that of retrieving bananas when positioned out of reach. He found that they stacked wooden crates to use as makeshift ladders, in order to retrieve the food. If the bananas were placed on the ground outside of the cage, they used sticks to lengthen the reach of their arms. Köhler concluded that the chimps had not arrived at these methods through trial-and-error (which American psychologist Edward Thorndike had claimed to be the basis of all animal learning, through his law of effect), but rather that they had experienced an insight, in which, having realized the answer, they then proceeded to carry it out in a way that was, in Köhler's words, "unwaveringly purposeful." After many observations with chimpanzees, it was concluded that these animals were capable of problem-solving and that they did not arrive at their methods through trial and error. This is one of the prominent findings from the research done on apes. Furthermore, it has been stated in the past that Köhler's work on the mentality of apes was a turning point in the psychology of thinking. He believed that we underestimate the influence of a number of external conditions on such higher animals. In the book The Mentality of Apes, Köhler explains that he was inspired to work with the chimpanzees for two main reasons. The first was because the "structure of their brains is more closely related to the chemistry of the human body and brain-structure than to the chemical nature of the lower apes and their brain development" Köhler (1925). The fact that human traits can be observed in the everyday behaviours of this animal was very intriguing for Köhler. The second reason for studying chimpanzees was inspired by the theoretical aim. Kohler wanted to gain knowledge of the nature of intelligent acts.

In the early stages of observing chimps, it was clear that the examinations should not be considered characteristic for each member of this species. Köhler recognized that, like humans, there is a great deal of individual differences in the intellectual field. Chimps demonstrated that they were able to grasp the objects around them in a variety of fashions. This is incorporated in their everyday playing behaviours. For this reason, it was not necessary to use experimental tests to introduce chimps to handle matter. In his book The Mentality of Apes, Köhler describes how the apes use their hands by explaining that "large, powerful and flexible hands are natural links between himself and the world of things, and he attains the necessary amount of muscular force and co-ordination at an earlier age than the human child" Köhler (1925).

Most of the observations were made in the first six months of 1914 while Köhler was working with Mr. Teuber. They provided the animals with problems that would be difficult for them to solve, but not impossible for a chimpanzee. Several tests were used on the animals to assess their abilities. One test required that they be placed in a cage with food positioned an arms length away. The chimps used sticks in order to obtain their food. In another, the chimps were aware that food was located in an area that was too high for them to reach and wooden boxes were made available to them. It was observed that the chimps stacked the boxes and climbed them in order to retrieve the food.

The conclusions drawn from the experiments with apes were that these animals exhibit insight and that they demonstrate intelligent behaviour that is common in humans. Köhler states that these findings hold true for every member of the species. He describes that "the correlation between intelligence and the development of the brain is confirmed" Köhler (1925). Köhler points out that a downfall of educational psychology at the time of the experiments with apes was that it had yet to create a test that was capable of assessing how far mentally healthy and mentally-ill children could go in particular situations. Köhler believes that studies of this type could be performed on young children and for this reason future research should focus on these possibilities. He stated that: "where the lack of human standards makes itself so much felt, I should like to emphasize particularly the importance and- if the anthropoids do not deceive us- the fruitfulness of further work in this direction" Köhler (1925).

Criticism of Introspection

In his book titled "Gestalt Psychology" Köhler took an active stance against introspection, a sub-discipline in psychology that was dominant in Germany throughout the late 1800s and early 1900s. Introspection, stemming from the ideas of the structuralist psychologists, is the self-reporting of conscious thoughts and sensations. It was believed that consciousness could be understood by breaking its elements down into basic parts. Köhler was quick to dismiss this train of thought. He claimed that the introspectionists were too subjective in their methodologies and did not test for reliability in their findings. For example, the description of sensing the colour red made by one individual may not be the same as the description of another. Where the introspectionists failed was their inability to adequately replicate particular findings. If one person was tested for their sensations regarding the colour red, these descriptions were simply shared among followers of the discipline. These descriptions were automatically taken as valid and no further testing of a particular sensation took place. In addition to this, Köhler claimed that introspection did not focus on immediate problems regarding direct human experience. One of the goals of empirical science is to obtain objective results that apply to almost everyone. The introspectionists, according to Köhler, did not consider objective experience a key point in their science.

Opinions of Behaviorism

Köhler was also vocal in his stance against behaviourism, another competing school of thought in North America. At the time, behaviourism focused solely on overt acts that were easily observable and measurable. Inner thoughts, feelings, and processes that occurred between the presentation of a stimulus and the onset of behaviour were considered part of a black box not easily understood. This black box, which could be described as cognition today, was not accessible and therefore should be discarded from psychology as being something important. The main idea of the behaviourists that Köhler stood against was the dismissal of direct experience. Direct experience was a construct that the behaviourists claimed was not measurable, and therefore didn't contribute to the furthering of human understanding. Köhler turned first to the difference between overt and covert behaviours. He argued that the behaviourists focused solely on overt behaviours in order to make inferences concerning human functioning. Using his background in physiology to address this issue, Köhler suggested that covert behaviours (such as heart rate and blood pressure) could offer additional insight into how we function and interact with the environment. In "Gestalt Psychology", Köhler describes advancements made in physiological research and the tools they had created to measure covert behaviours. Covert behaviours such as increased heart rate could provide additional insight into how people interact with particular stimuli. The behaviourists, according to Köhler, never adequately utilized these new instruments to make sound inferences on human behaviour. Köhler also provided a counter-attack to the standpoint that direct experience is not measurable and should therefore be ignored. Drawing upon his personal experience and interest in the field of physics, Köhler uses the example of two physicists observing a galvanometer (an instrument that detects and measures electrical current) and making inferences based on the information it provides. According to Köhler, behaviourists act in a much similar way when observing behaviours. One behaviourist will observe a behaviour and share results, leading to an extension of these findings by others in the field. While behaviourism denies direct experience, Köhler suggests that behaviourists are unknowingly accepting it in this regard. Just as the galvanometer is independent of the physicist, so is the subject from the behaviourist. Direct experience results in the observation of phenomena and leads to results. In this regard, the standpoint made by the behaviourists appears somewhat paradoxical.

Berlin Psychological Institute

Köhler returned to Germany in 1920, and soon after was appointed the acting director, and then (as Carl Stumpf's successor) professor and director of the Psychological Institute at the University of Berlin, where he remained until 1935. In those fifteen years, his accomplishments were considerable, including, for example, the directorship of the school's prestigious graduate program in psychology; the co-founding of an influential journal about perceptual psychology, titled Psychologische Forschung (Psychological Research: Journal of Psychology and its Neighboring Fields); and the authorship of an early book titled Gestalt Psychology (1929), written especially for an American audience. During the 1920s and early 1930s psychology reached a high point at the institute. Aside from Köhler, many other influential minds were at work. Max Wertheimer was part of the institute from 1916 to 1929, until he left to take a position in Frankfurt. In addition, Kurt Lewin remained at the institute until 1933 (the year of his resignation). Köhler also had many well-known assistants at the institute, including Karl Duncker, whose work revolved around problem solving and induced movement. Von Lauenstein, another assistant of Köhler, is known mainly for his investigation of time errors and memory. Finally, von Restorff is best known for her collaboration efforts with Köhler on both the isolation effect and theory of recall.

Nazi Germany

The Nazi party, led by Adolf Hitler, rose to power on January 30, 1933. Any professors with a Jewish background were considered a threat to the newly founded regime and were therefore actively dismissed from German universities. Max Planck, a well-known physicist, petitioned Hitler to stop the dismissal of Jewish professors, stressing their importance regarding scientific contributions. Hitler has been quoted as responding to Planck, "if the dismissal of Jewish scientists means the annihilation of contemporary German science, then we shall do without science for a few years". Köhler did not make a public stand against the Nazi regime until the end of April 1933. During the beginning of that month, Köhler still expressed confusion towards the threat that the regime imposed. Although he was wary of the developing situation, the beginning of his active stance against the Nazis did not begin until the dismissal of Karl Planck, a well-known experimental physicist. On April 28, 1933, Köhler wrote an article titled "Gespräche in Deutschland" (Conversations in Germany). It was written for the Deutsche Allgemeine Zeitungand is officially the last published article that openly attacked the Nazi Regime during their empowerment. After the publication of the article, Köhler expected immediate arrest. However, the Nazis did not come for him. Even four months after the article was originally published, reprints were still being distributed. Köhler received numerous letters from Jews and non-Jews, expressing their gratitude and admiring his courage. To further strengthen his stance against the Nazis, Köhler also sought assistance from his colleagues. To his disappointment, many of Köhler's colleagues refused to become involved in the anti-Nazi movement. It was believed that the German political system was too complex for the Nazis to fully grasp. In addition, some colleagues argued that Köhler's resistance fell outside their particular spheres of influence. In turn, they could contribute nothing. On November 3, 1933, the Nazi government demanded that professors open their lectures by giving the Nazi salute. Köhler saw this as a violation of his own beliefs and expressed to his students that he was unable to engage in such an act. His excuse was met with applause, both from Nazi sympathizers and rebels alike. The situation at the institute began to deteriorate much faster after this occurrence. In December 1933, Nazi officials stood outside of a seminar room where Köhler was giving a talk. When students began to leave, they were stopped and had their student cards examined. Although Köhler did not interfere with this, he later contacted the rector, Eugen Fischer, complaining that an unannounced raid had occurred. Köhler later took his argument to the Minister of Education. Unfortunately, he was met with the unwelcoming response, "there is nothing I care to do for you. Heil Hitler."

Later life

Having fallen out of favor with the Nazis (for having opposed the dismissal of his Jewish colleagues), Köhler emigrated to the U.S. in 1935. He was offered a professorship at Swarthmore College, where he remained on the faculty for twenty years. In 1956, he became a research professor at Dartmouth College, and soon after also served as the president of the American Psychological Association. He lectured freely in America and made yearly visits to the Free University of Berlin. Here, he acted as an adviser for the faculty. He kept the psychologists in touch with American psychology by collaborating with them in research and enthusiastically engaging in discussions with them. He was honoured to receive the Distinguished Scientific Contributions Award of the American Psychological Association in 1956. In 1967 the Association planned to give him its gold medal, but he died before it could be awarded. He died in 1967 in Enfield, New Hampshire.[1]


These are the editions in English:

  • 1925. The mentality of apes, transl. from the 2nd German edition by Ella Winter. London: Kegan, Trench and New York: Harcourt, Brace and World. Original was Intelligenzprüfungen an Anthropoiden, Berlin 1917. 2nd German edition was titled Intelligenzprüfungen an Menschenaffen, Berlin: Springer 1921. Liveright 1976 reprint: ISBN 978-0871401083
  • 1929. Gestalt psychology. New York: Liveright. London: Bell 1930. A heavily revised translation into German, Psychologische Probleme, was published in 1933 by Springer, Berlin.
  • 1938. The place of value in a world of facts. New York: Liveright. Norton reprint 1976: ISBN 978-0871401076
  • 1940. Dynamics in psychology. New York: Liveright.
  • 1947. Gestalt psychology: an introduction to new concepts in modern psychology. New York: Liveright. A revised edition of the 1929 book. Norton 1992 reprint: ISBN 978-0871402189
  • 1971. Henle, Mary (ed). The selected papers of Wolfgang Köhler. New York: Liveright. ISBN 978-0871402530

Preceded by:
Harry Harlow
Wolfgang Köhler elected APA President
Succeeded by:
D.O. Hebb

See also



  • Kohler, W.(1920) Mentality of Apes
  • Kohler, W.(1969) Gestalt Psychology

Book Chapters


Köhler,W. (1959) Gestalt Psychology Today American Psychologist, 14, 727-734.Full text APA presidential addresss

External links

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