...In many laboratory demonstrations, gestalt psychologists showed that in conscious experience whole project and scenes take precedence over parts. For example, when looking at a chair, people perceive and recognize the chair as a whole before noticing its arms, legs and other components. Treisman and other modern perceptual psychologists would not agree with this point. In our conscious experience we do typically perceive wholes before we perceive parts; the build up of the wholes from the parts occurs through unconscious mental processes. the would also agree that the whole is different from the sum of its parts, because the whole is defined by the way the parts are organized, not just by parts themselves.引自 The psychology of vision
1. the project and scenes is more commonly sensed take precedence to its separate parts which are less commonly sensed.
2. we see things categorized according to our library, which is built in and built up.