Karl Ludwig Bühler (German: [ˈbyːlɐ]; 27 May 1879 – 24 October 1963) was a German psychologist and linguist. In psychology he is known for his work in Gestalt psychology, and he was one of the founders of the Würzburg School of psychology. In linguistics he is known for his organon model of communication and his treatment of deixis as a linguistic phenomenon.
He was the dissertation advisor of Karl Popper.
Insight is the understanding of a specific cause and effect within a particular context. The term insight can have several related meanings:
An insight that manifests itself suddenly, such as understanding how to solve a difficult problem, is sometimes called by the German word Aha-Erlebnis. The term was coined by the German psychologist and theoretical linguist Karl Bühler. It is also known as an epiphany, eureka moment, or (for crossword solvers) the penny dropping moment (PDM). Sudden sickening realisations often identify a problem rather than solving it, so Uh-oh rather than Aha moments are seen in negative insight. A further example of negative insight is chagrin which is annoyance at the obviousness of a solution that was missed up until the (perhaps too late) point of insight, an example of this being Homer Simpson's catchphrase exclamation, D'oh!.
Roman Jakobson defined six functions of language (or communication functions), according to which an effective act of verbal communication can be described. Each of the functions has an associated factor. For this work, Jakobson was influenced by Karl Bühler's organon model, to which he added the poetic, phatic and metalingual functions.