PSY 105 Lecture Notes - Lecture 5: Detection Theory, Absolute Threshold, Neural Adaptation
18 Dec 2019
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Sensation: detection of physical energy by the sense organs: stimulus: something that can be sensed or reacted to. Perception: the brain"s interpretation of raw sensory data. Sensory adaptation: how we don"t realize we smell or our house smells. Are you moving: better at knowing your moving down then up. Just noticeable difference: the smallest amount of stimulus change humans can detect ex) spotting weight difference: female 5ft 4, 123 lbs, change of 6. 6 lbs noticeable pounds. Weber"s law: the stronger the stimulus the greater the change needed to detect: ex 1) 2% brightness to 5% would be more noticeable then 95% to 98% Ex 2) female 5ft 4, 123 lbs: change of 6. 6 lbs noticeable pounds. Female 5ft 4, 196 lbs: change of 12. 1 lbs. Signal detection theory: negative is you disagree with statement, position is you agree with the statement. Pop quiz: john thinks he doesnt smell bad but he does false negative.
