psy chapter 5 notes september 22 2009

psy chapter 5 notes september 22 2009 - : Chapter 5 1....

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: Chapter 5 1. SENSATION AND PERCEPTION A) Temporal lobe-object recognition, auditory processes B) Parietal lobe- sensations of touch C) Occipital lobe- vision THE DISTINCTION 1 ) Sensation - stimulation of sense organs 2) Perception - selection, organization, and interpretation of sensory input 3) Adaptation - responsiveness to a stimulus decreases over time 4) Transduction - process of converting energy into neural activity 5) Psychophysics - the study of how physical stimuli are translated into psychological experience Sensory organs absorb energy from physical stimuli in the environment PSYCHOPHYSICS: BASIC CONCEPTS 1. Sensation begins with a detectable stimulus 2. Fechner: came up with the concept of the threshold a. Absolute threshold : detected 50% of the time i. Defined as the lowest intensity at which a stimulus can be detected 50% of the time ii. The lower the absolute threshold, the greater the sensitivity 1. Vision-candle flame seen at 30 miles on a clear dark night-don’t need to know b. Just Noticeable Difference (JND) : smallest detectable difference between two stimuli of different intensities that people can perceive 50 % of the time
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psy chapter 5 notes september 22 2009 - : Chapter 5 1....

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