PSYC 101 Lecture Notes - Lecture 4: Hermann Von Helmholtz, Basilar Membrane, Detection Theory
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PSYC 101 Full Course Notes
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Document Summary
Light hitting retina, sound waves hitting ear, etc. Perception is constructed: prior experience, expectations, attention. Cross-modal perception: most of the time, light leads to vision, sound leads to hearing, etc, sensation is determined by the nature of the sense receptor, not the stimulus. Phosphenes: combination of senses can lead to different perceptual experience. Condition in which people experience cross-module sensations. Study of how physical stimuli are translated into psychological experience. Absolute threshold: stimulus intensity at which the stimulus is detected 50% of the time. Just noticeable difference: smallest difference in the amount of stimulation that a specific sense can detect, weber"s law initial stimulus. The size of the jnd is a constant proportion to the size of the. Signal detection theory: detection of stimuli involves decision and sensory process, looking at how different conditions influence our bias. Gradual decline in sensitivity due to prolonged stimulation. Dorsal stream: goes up to the parietal lobe, processes where objects are.
