PSY100Y5 Lecture Notes - Lecture 3: Sensory Neuron, Absolute Threshold, Psychophysics
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Absolute threshold; when you say the line on the right is larger than the line on the left 50% of the time, meaning your answer must have been larger the other 50% of the time. Just noticeable difference (jnd); the smallest difference detectable. Weber"s law: size of jnd proportional to size of initial stimulus. We have 5 senses and sensation is strictly hitting those senses. Sensation is about the cells that get excited, For ex: if someone speaks russian to you, you would hear it and the cells would still be firing even if you don"t know the language. Perception is basically the understanding of what"s coming in. Perception: selection, organization, and interpretation of sensory input. Psychophysics: the study of how physical stimuli are translated into psychological experience. Sensation: sensory organs absorb energy from physical stimuli in the environment. Sensory receptors detect stimulus energies and convert them into neural impulses, which are sent to the brain.
