[PSYA01H3] - Midterm Exam Guide - Comprehensive Notes for the exam (98 pages long!)

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Published on 5 Oct 2016
School
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UTSC
PSYA01H3
MIDTERM EXAM
STUDY GUIDE
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Chapter 4: Sensation and Perception
Synesthesia: the perceptual experience of one sense that is evoked by
another sense
Example: Seeing a poster of JB makes me throw up (no offence to JB
fans)
4.1 OUR SENSES ENCODE THE INFORMATION OUR BRAINS PERCEIVE
Sensation is a simple stimulation of a sense organ
Basic regulation of light, sound, pressure, odor, or taste as parts of your
body interact with the physical world
Perception takes place at the level of your brain: It is the organization,
identification, and interpretation of a sensation in order to form a mental
representation
As you are reading this message your eyeballs are registering
different patterns of light reflecting off the page
The brain is integrating and processing that light information into
the meaningful perception of words
Our senses depend on the process of transduction, which occurs when many
sensors in the body convert physical signals from the environment into encoding
neural signals sent to the central nervous system
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4.2 PSYCHOPHYSICS
Psychophysics: methods that measure the strength of a stimulus and the
observer’s sensitivity to that stimulus
4.3 MEASURING THRESHOLDS
Absolute Threshold
The minimal intensity needed to just barely detect a stimulus
It is a boundary
Example: If you baked cupcakes, I can probably still smell it from a room that is
20 meters away. If you were outside, that is a different story. You better not hide
those mouth watering cupcakes 
Difference Thresholds
The human perceptual system excels at detecting changes in stimulation rather
than the simple onset or offset of stimulation
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