Subjective contours exist not in the distal stimulus but only in the subjective experience. Principles of Perceptual Grouping. Minimum principle of perception. G. Identification and recognition attach meaning to percepts. Contexts form Expectations.
Perceptual set is a readiness to detect a particular stimulus in a given context.
Set is temporary readiness to perceive or react to a stimulus in a particular way. Imaginative, personally enriching and fun.