26 Cards in this Set
| Front | Back |
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Perceptual Process
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sequence of processes that work together to determine our exp of and rxn to stimuli in the environment
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Environmental Stimuli
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All things in the environment that we can potentially perceive.
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Attended Stimuli
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The stimulus at the center of attention
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Stimulus on the Receptors
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stimulus transferred to sensory organ
Ex. image of moth on retina
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Transduction
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transformation of one type of energy into another
Ex. in the eye, light energy is transduced into chemical energy
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Neural Processing
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operations that transform electrical within a network of neurons or that transform the response of individual neurons
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Occipital Lobe
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responsible for vision
located at back of cortex
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Temporal Lobe
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Responsible for Hearing
side of cortex
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Parietal Lobe
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responsible for Touch
top of cortex
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Principle of Transformation
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Stimuli and responses created by stimuli are changed between the environmental stimulus and perception
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Principle of Representation
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Everything perceived is based on a representation of stimuli that are formed on receptors and activity in the persons nervous system.
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Bottom Up Processing
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processing that is based on incoming data
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Top Down Processing
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processing that is based on prior knowledge
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Psychophysical approach
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the use of quantitative methods to
measure relationships between stimuli and perception
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Physiological Approach
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Measuring the relationship between stimuli and physiological
processes.
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Absolute threshold
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Minimum stimulus necessary to detect
a stimulus.
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Difference Threshold
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The smallest difference between two stimuli that a person can detect.
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Weber's Law
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DL/S = K
DL - difference threshold
S - standard stimulus
K - constant
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Response compression
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The result when doubling the physical intensity of a stimulus less than doubles the subjective magnitude of the stimulus.
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Response Expansion
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The result when doubling the physical intensity of a stimulus more than doubles the subjective magnitude of the stimulus.
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Steven's Power Law
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A law concerning the relationship between the physical intensity of a stimulus and the perception of the subjective magnitude of the stimulus. The law states that P KSn, where P is perceived magnitude, K is a constant, S is the stimulus intensity, and n is an exponent.
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Action Potential
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Rapid increase in positive charge in a nerve fiber that travels down the fiber.
Also called the nerve impulse.
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Receptor Neurons
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neuron which are specialized
to respond to environmental stimuli
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Staining
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invented by Camillo Golgi
Dyes are injected into the nervous system that stain individual neurons but not the surrounding tissue.
enabled visualization of neurons
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Camillo Golgi
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Invented "staining"
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Bipolar Cell
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A retinal neuron that receives inputs from the visual receptors and sends signals to the retinal ganglion cells.
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PSYC 320 Exam 1