(1) 1.10 Sensation and Perception
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11 Terms
Sensation
How sensory receptors receive info from the environment.
Perception
How our brain organizes and interprets sensory input.
Bottom-up processing
Begins with sensory receptors and works up to higher levels of processing without prior info or knowledge.
Top-down processing
Creates perceptions based on our experience and expectations.
Transduction
Transforming physical energy (sight, sounds, & smells) into neural impulses that the brain can interpret.
Subliminal
Below one’s absolute threshold for conscious awareness.
Priming
Activation, often unconsciously, of certain associations.
Difference Threshold
The minimum amount needed to tell a difference a person can detect between any 2 stimuli half the time.
Weber’s Law
2 stimuli must differ by a minimum percentage rather than a constant amount.
Sensory Adaptation
Diminished sensitivity as a consequence of constant stimulation.
Absolute Threshold
The minimum level of stimulus intensity needed for a person to detect a stimulus.
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