Printing 'Perception'

Gibson	Concept of ambient optic array
Cones	Fine detail/colour
Rods	Course detail/movement
Top-down process of perception	Use knowledge of the structure of the world to influence perception (conceptually driven)

Bottom-up process of perception	Use only information coming into the eye to make judgements on the nature of the visual world (data-driven)
Top-down processing Constructivist approach	HELMHOLTZ Perception is an active constructive process End-product of external stimuli and internal factors e.g. hypotheses expectations and motives therefore prone to error
Top down processing Constructivist approach	GREGORY Perception is the dynamic searching for the best interpretation demonstrated by: Perceptual constancy Illusion
Perceptual constancy	View objects eventhough their true properties aren't reflected in the retinal image Shape constancy (circular cup looks elipse) Orientation constancy (world doesn't tilt as you tilt your head) Location constancy (world stays constant eventhough we're constanly moving

Gregory 4 types of visual illusion	Distortion-Muller-Lyer arrows (perceptual error) Ambiguous figure-Rubin's vase (different interp) Paradoxical figures-Penrose triangle (3D assumptions) Fictions-Kanizsa triangle (perceive absent)
Milner and Goodale Info form primary visual cortex diverges into 2 anatomical streams	Dorsal=Vision for action, posterior parietal cortex Ventral=Vision for identification, interior temporal cortex