Gestalt psychology or gestaltism (German: Gestalt – "essence or shape of an entity's complete form") is a theory of mind and brain of the Berlin School; the operational principle of gestalt psychology is that the brain is holistic, parallel, and analog, with self-organizing tendencies. The principle maintains that the human eye sees objects in their entirety before perceiving their individual parts. Gestalt psychologists stipulate that perception is the product of complex interactions among various stimuli. Contrary to the behaviouralist approach to understanding the elements of cognitive processes, gestalt psychologists sought to understand their organization (Carlson and Heth, 2010). The gestalt effect is the form-generating capability of our senses, particularly with respect to the visual recognition of figures and whole forms instead of just a collection of simple lines and curves. In psychology, gestaltism is often opposed to structuralism. The phrase "The whole is greater than the sum of the parts" is often used when explaining gestalt theory, though this is a mistranslation of Kurt Koffka's original phrase, "The whole is other than the sum of the parts". Gestalt theory allows for the breakup of elements from the whole situation into what it really is.