PSY 217 Lecture Notes - Lecture 3: Necker Cube, Color Vision, Peripheral Vision
2 Feb 2018
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Document Summary
Necker cube shows sensation and perception are different. What is sensed by eyes is just an arrangement of 2d lines. What we sense does not change over time. Proximal stimulus: physical energy that stimulates specialized receptor cells. Perception - organization and interpretation of sensations. Influenced by knowledge of world, expectations, context, attention. Simons and chabris found that 73% of participants failed to see gorilla. Shows that attention plays important role in perception. Need brains to fill in the gaps (perception) Info that we receive with our senses is impoverished. Light source emits electromagnetic radiation that travels as a wave. Waves can differ in amplitude and wavelength. Tiny range of possible wavelengths visible as light. Low amplitude = dull, high amplitude = bright. Color or hue - subjective perception of wavelength. Low frequency = violet, high frequency = red. Pupil - regulates amount of light passing into the eye. Lens - focuses light rays to fall on retina.
