PSYCH-UA 1 Chapter Notes - Chapter 4: Faial Island, Subjective Constancy, Ponzo Illusion
24 Jun 2015
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4. 1: how do we sense our worlds: we experience the world in 2 distinct phases: sensation & perception, sensation: sense organs" detection of external stimuli like light, air vibrations, odors; responses to stimuli; transmission of responses to brain. Detection: perception: processing, organization, interpretation of sensory signals; results in internal representation of stimulus. Construction of useful & meaningful info about particular environment: example of driving up to traffic signal as light turns green: Sensation: sensory receptors in eyes detect this stimulus. Sensory coding: stimulus is transduced (translated into chemical and electrical signals that are transmitted to brain) Stimuli must be translated into chemical & electrical signals that brain can. Qualitative info: basic qualities of a stimulus, ex: color of a light (red, green) Quantitative info: degree/magnitude of those qualities, ex: loudness or soundness of a sound, brightness of light: quantitative differences coded by the rate of a particular neuron"s firing.
