PSYC 101 Chapter 3.docx - Chapter 3 Sensation process of...

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Chapter 3 Sensation- process of receiving stimulus energies from external environment; biological process Perception- process of organizing and interpreting sensory information; psychological process Sensory receptors- specialized cells that detect stimulus information and transmit it to sensory (afferent) nerves and brain; openings which the brain and nervous system experience the world Photoreception- detection of light; perceived as sight Mechanoreception- detection of pressure, vibration, and movement; perceived as touch, hearing, and equilibrium Chemoreception- detection of chemical stimuli; perceived as smell and taste Absolute threshold- minimum amount of detectable stimulus energy needed to reliably trigger a sensory receptor Difference threshold- degree of difference that must exist between two stimuli before the person can notice that a difference exists Bottom-up processing- stimulation works its way from the environment up to the level of
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