PSY 102 Lecture Notes - Lecture 4: Nanometre, Headphones, Basilar Membrane
Document Summary
Sensation and perception sensation: stimulation of the sense organs stimulus (physical energy) is "raw data" about the outside world received by specialized "receptor" cells in eyes, ears, skin, nose, tongue, etc. "raw data" sent to the brain: perception: the organization and interpretation of sensations, brain makes sense of "raw data" influenced by knowledge of the world, expectations, context, etc. limited by attention. Attention defined: method for studying attention developed in the 1950s - dichotic listening - you wear headphones and you hear different stuff coming out of each earphone. Within that range: brightness = perception of amplitude low amplitude = dull, high amplitude = bright. Seeing: the visual system: a tiny range of possible wavelengths is visible as light. Within that range: colour or hue = subjective perception of wavelength low frequency = violet (400nm, high frequency = red (700nm)
