Review: Introduction.

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Presentation transcript:

Review: Introduction

Sensation Sensing the World: Some Basic Principles Vision Threshold Sensory Adaptation Vision The Stimulus Input: Light Energy The Eye

Sensation Vision Hearing Visual Information Processing Color Vision The Stimulus Input: Sound Waves The Ear Hearing Loss and Deaf Culture

Sensation Other Important Senses Touch Taste Smell Body Position and Movement

Exploring the Senses What stimuli cross our threshold for conscious awareness? Could we be influenced by stimuli too weak (subliminal) to be perceived? Why are we unaware of unchanging stimuli, like a band-aid on our skin?

Psychophysics A study of the relationship between physical characteristics of stimuli and our psychological experience with them. Physical World Psychological World Light Brightness Sound Volume Pressure Weight Sugar Sweet

Thresholds Absolute Threshold: Minimum stimulation needed to detect a particular stimulus 50% of the time. Proportion of “Yes” Responses 0.00 0.50 1.00 0 5 10 15 20 25 Stimulus Intensity (lumens) OBJECTIVE 2| Distinguish between absolute and difference thresholds, and discuss whether we can sense stimuli below our absolute thresholds and be influenced by them.

Sensory Adaptation Diminished sensitivity as a consequence of constant stimulation. OBJECTIVE 3| Describe sensory adaptation, and explain how we benefit from being unaware of changing stimuli. Put a band aid on your arm and after awhile you don’t sense it.