Perceptural Constancy

Perceptual Constancy

See an object as unchanging even as illumination and retina images change

Shape constancy

to perceive familiar objects (for example, an opening door) as unchanging in shape

Lightness constancy

to perceive an object as having a constant lightness even when the light that dalls on it changes. Perceive lightness depends on relative luminance 

Color constancy 

to perceive the color of an object as unchaning even when its illumination changes 

Size constancy

Percevinf objects as unchanging in size, despite the changing images they cast on our retinas

• the perceived relationship between distanve and size is generally valid but under special circumstances can lead us astray

• Perception is influenced by our experiences (our learned assumptions and beliefs) and by sensory input

Perceptural set

a mental prediposition to perceive one thing and not another

• through experience, we also form concepts or schemas which organize and interpret unfamiliar information