Chapter 10 Flashcards
(39 cards)
Trichromatic theory of vision
HELMHOLTZ
model that explains how humans see color by proposing three types of cones that are sensitive to red blue and green light
Handbook of pysiolgical optics
By HELMHOLTZ
work on the sience of vision
Structure of human eye
Processes of vision
Perception of visual info
Herman Von Helmholtz
1821-1894
Physiochemical approach
All biological things can be understood in terms of physical laws
Psychology came from physiology
Handbook of psyiological optics
Tricromatic Theory of vision
Method of average error/adjustment
The test subject alters something until they think it is equal to a refernece
FECHNER
Method of constant stimuli
Repeatedly using the same stimuli at different intensities
FECHNER
Method of Limits
Determines sensory thresholds by gradually intensifying or detensifying the stimuli
FECHNER
Gustav Fechner
1801-1807
Similar ideas to weber
Formualted his own methods and formulas
Became blind due to staring at the sun
Color after images (flag)
Experimental psychology
Helping establish psychophysics
What was so important about Weber?
Proved Kant idea of universal reason wrong by subjective meanings and values making it difficult to apply a one size fits all approach and began using quantative data in pysch
Webers Law
Size of the just noticeable differnece is a constant proportion of the original stimulis value
Webers Illusion
Distance between two touches on the skin is larger in a more sensitive area.
Ernst Heinrich Weber
1795-1878
- quantative data
-Touch, two point threshold technique
- Created somatosensory map of human body
- less sensitive if measured longitudinally than transversley
-webers illusion
-experimental psychology
Which systems approach is first?
Psychophysics
Absolute Threshold’s
Limit of possible experiences
WEBER
Two point thresholds
The distance where two points are experienced as one
Difference thresholds
The minimal stimulus difference detectable at 50%
WEBER
What are thresholds
Maximal or minimal stimulus intensity detected at 50% of the time
How are psychophysics measured ?
Measured by a physical scale and psychological impressions of stimuli.
Psychophysics
Study of relationships between physical properties of stimuli and the psychological or subjective impressions of it
Psychology’s first laboratory
1879 by WUNDT
Wilhelm Wundt
The uphill battle to establish psych as a system
Introspection might cause mental breakdowns
Mind and body: mental function related to voluntary movements
Importance of experience
Voluntarism
The will organizes the minds content into higher level processes
WUNDT
What did Wundt think about voluntary actions?
To be free an action must be voluntary but not all voluntary actions are free
FREE WILL
WUNDT
possible but only with a truly reflective self consciousness
Why was WUNDT controversial?
Studied only high cognitive people, which discriminated against children, elderly, disabled, women, poc, etc