Ch.5.ppt - F07

Ch.5.ppt - F07 - Chapter 5: Sensation Sensation a process...

Info iconThis preview shows pages 1–13. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 5: Sensation Sensation Sensation Sensation a process by which our sensory a process by which our sensory receptors and nervous system receive receptors and nervous system receive and represent stimulus energy and represent stimulus energy Perception Perception a process of organizing and interpreting a process of organizing and interpreting sensory information, enabling us to sensory information, enabling us to recognize meaningful objects and recognize meaningful objects and events events
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Sensation - Thresholds Sensation - Thresholds Absolute Threshold Absolute Threshold minimum stimulation needed to detect a minimum stimulation needed to detect a particular stimulus particular stimulus usually defined as the stimulus needed for usually defined as the stimulus needed for detection 50% of the time detection 50% of the time Subliminal detection
Background image of page 2
Sensation - Thresholds Sensation - Thresholds Proportion of “Yes” Responses 0.00                 0.50                1.00              0            5            10           15          20          25                            Stimulus Intensity (lumens)
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Signal Detection Theory (SDT) Predicts how and when we detect the presence of a  faint stimulus (signal) amid background noise (other  stimulation). SDT assumes that there is no single  absolute threshold and detection depends on: Person’s experience Expectations Motivation Level of fatigue Carol Lee/ Tony Stone Images
Background image of page 4
Sensation - Thresholds Sensation - Thresholds Sensory adaptation Sensory adaptation - diminished - diminished sensitivity with constant stimulation sensitivity with constant stimulation
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Vision- Stabilized Images on Vision- Stabilized Images on the Retina the Retina
Background image of page 6
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Wavelength (Hue) Hue (color)   is the  dimension of color  determined by the  wavelength of the   light. Wavelength   is   the  distance from the  peak of one wave to  the peak of the next.
Background image of page 8
Wavelength (Hue) Different wavelengths of light result in different colors. 400 nm 700 nm Long wavelengths Short wavelengths Violet Indigo Blue Green Yellow Orange Red
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Intensity (Brightness) Intensity   Amount of  energy in a wave  determined by  the amplitude. It  is related to  perceived  brightness.
Background image of page 10
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Parts of the eye 1. Cornea:
Background image of page 12
Image of page 13
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/14/2008 for the course PSY 1305 taught by Professor Rowatt during the Fall '07 term at Baylor.

Page1 / 47

Ch.5.ppt - F07 - Chapter 5: Sensation Sensation a process...

This preview shows document pages 1 - 13. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online