PSYC 100 Lecture Notes - Lecture 6: Decibel, Electromagnetic Spectrum, Interposition

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Sensation: environmental stimuli that"s part of the cns. Psychophysicists want to know when is the first instance that a person detects a stimulus. Absolute thresholds aren"t looking for you to identify it 100% of the time, 50% is all their looking for: part of two states: i"m aware of it and i"m not. One thing about detection is that even the lightest touch will be felt. People seem to be most sensitive to sound at the decibel level of conversation (50 to 60 decibels: a dog can hear a high tone, but we can"t of two laptops must be at a relative portion. Weber"s law: for you to detect the different between two laptops, the proportion of the weight. Any stimulation that comes in has to change to a neural impulse. The perceptual organ known as your brain is transforming physical things into mental representation (through memory) Synesthesia: ex. a word evokes some taste in your mouth.

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