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Lecture 4

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Department
Psychology
Course
PSYCH 101
Professor
Richard Ennis
Semester
Winter

Description
SENSATION AND PERCEPTION
 Lecture Outline Two Inseparable Processes Transduction Smell: The Rodney Dangerfield of the Senses The Smelly Facts Smell and the Limbic System The Right Chemistry Extra-Sensory Perception Types of ESP The Evidence Two Inseparable Processes SENSATION PERCEPTION • Physical sensing of • Mental interpretation of environment environment • Physiological • Psychological • Relatively objective • Relatively subjective • Learning & experience • Learning & experience NOT required ARE required From Sensory Organs to the Brain The process of sensation can be seen as three steps: Reception-- the Transductio Transmissio stimulation of transforming nthis neuralg sensory this cell information reby energylls stimulation to the brain (sound, light, into neural to be heat, etc) impulses processed Smelly Facts • Only 3% of sensory neurons –Compared to 30% devoted to vision • Only about 200 researchers worldwide • Human nose one of the least sensitive in the animal kingdom –Yet we can detect one billionth of an ounce of odour in the air Smelly Facts • Smell was our first sense – Our earliest “brain” was just an olfactory processor • Every living organism has the ability to sense chemicals in its environment • The nose i
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