PSY 102 Chapter 4: PSY102 Chap 4 Lec 4 Sensation and Perception
10 Feb 2016
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Illusion: perception in which the way we perceive does not match the stimulus in the physical world. Sensation: detection of physical energy by sense organs (eyes, ears, nose, skin, tongue) Perception: brain"s interpretation from sense organs (brains interpretations of raw sensory inputs) Gives meaning and coherence to raw data. Our perceptions don"t always match reality (defies na ve realism) e. g. , filling in, reconstruction, interpolation filling in: reconstructing the surrounding and filling it in the middle of an empty space. When the nervous system converts external stimuli (energy or substance) into electrical signals within neurons. Done by sense receptors: specialized cell that transduces a specific stimulus (responsible for converting external stimuli into neural activity for a specific sensory system) specific to certain stimuli (sight, smell, touch) Sensory adaptation: activation is the greatest when a stimulus is first detected. Study of how we perceive sensory stimuli based on their physical characteristics.
