Lecture - 9 - April 20th

Lecture - 9 - April 20th - SENSATION AND PERCEPTION Chapter...

Info iconThis preview shows pages 1–10. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 6 SENSATION AND PERCEPTION
Background image of page 1

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

View Full DocumentRight Arrow Icon
SEEING THE WORLD: SOME BASIC CONCEPTS Sensation and Perception Sensation Refers to the process by which we detect physical energy ( a stimulus ) from the environment and convert it into neural signals. Perception Refers to the process by which we select, organize and interpret our sensations.
Background image of page 2
Bottom - Up and Top - Down Processing SEEING THE WORLD: SOME BASIC CONCEPTS Bottom - up processing is processing that begins with sense receptors and works up to the brain’s integration of that sensory information. Sensation Perception Physical World
Background image of page 3

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

View Full DocumentRight Arrow Icon
5 ) ) 5 Bottom - Up and Top - Down Processing SEEING THE WORLD: SOME BASIC CONCEPTS Top - down processing is processing that is guided by an individual’s prior knowledge and expectations.
Background image of page 4
Psychophysics SEEING THE WORLD: SOME BASIC CONCEPTS Psychophysics is the study of the relationship between the physical characteristics of stimuli and our psychological experience of them. 1801 - 1887 Gustav Theodor Fechner He demonstrated that we could measure subjective experience and relate it to the objective world in a lawful way. He thus set the stage for the development of scientiFc psychology!
Background image of page 5

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

View Full DocumentRight Arrow Icon
The Absolute Threshold SEEING THE WORLD: SOME BASIC CONCEPTS The absolute threshold refers to minimum stimulation needed to detect a particular stimulus 50 percent of the time. Proportionof“Yes”Responses 0 5 10 15 20 25 Stimulus Intensity (lumens)
Background image of page 6
Signal Detection Theory SEEING THE WORLD: SOME BASIC CONCEPTS It assumes there is no absolute threshold and that detection of a faint stimulus ( signal ) amid background stimulation ( noise ) depends on a persons experience, expectation, motivation and level of fatigue.
Background image of page 7

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

View Full DocumentRight Arrow Icon
Subliminal Stimulation SEEING THE WORLD: SOME BASIC CONCEPTS A signal is said to be subliminal if it falls below ones absolute threshold for conscious awareness.
Background image of page 8
Subliminal Stimulation - Research Examples Can we really be infuenced by a stimulus that cannot be consciously experienced? SEEING THE WORLD: SOME BASIC CONCEPTS Debner and Jacoby ( 1994 ) - Process Dissociation Procedure “Complete the Following words in any way you wish excep t with the word that immediately preceded it.” Spice Spice XXXX XXXX Spi__ Spi__ More likely to use the prime word to complete the word stem than iF they had not been primed with the word! Less
Background image of page 9

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

View Full DocumentRight Arrow Icon
Image of page 10
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 10/11/2011 for the course PSYC 1 taught by Professor Stuartantsis during the Spring '08 term at UCSD.

Page1 / 42

Lecture - 9 - April 20th - SENSATION AND PERCEPTION Chapter...

This preview shows document pages 1 - 10. Sign up to view the full document.

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