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Psychology (1,867)
PSY100Y5 (787)
Dax Urbszat (659)
Chapter 4

PSY100 Chapter 4 Notes.pdf

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University of Toronto Mississauga
Dax Urbszat

Chapter 4: Sensation & Perception▯ ▯ - psycho-physicists use a variety of methods to relate sensory inputs to subjective perception▯ - they have found that absolute thresholds are not really absolute▯ - Weber’s law states that the size of a just noticeable difference is a constant proportion of the size of the initial stimulus▯ - Fechner’s law asserts that larger and larger increases in stimulus intensity are required to produce just noticeable differences in the magnitude of sensation▯ - the detection of sensory inputs is influenced by noise in the system and by decision making strategies▯ - signal-detection theory replaces Fechner’s sharp threshold with the concept of detectability and emphasizes that factors besides stimulus intensify influence detectability▯ - perception can occur without awareness▯ - the effects of subliminal perception are relatively weak and of little/no practical concern▯ - prolonged stimulation may lead to sensory adaptation (reduction in sensitivity to constant stimulation
 ▯ - light varies in terms of wavelength, amplitude, and purity▯ - light enters through the cornea and pupil, and is focused upside down on the retina by the lens▯ - nearsighted = distant objects blurry▯ - farsighted = close objects blurry▯ - retina is the neural tissue in the e
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