Glossary of Psychology Ch. 6
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- process in which the sense organs’ receptor cells are stimulated and relay initial information to the brain for further processing.
- process by which an organism selects and interprets sensory input so that it acquires meaning
- subfield of psychology that focuses on the relationship between physical stimuli and people’s conscious experience of them.
- a threshold is the point at which a stimulus becomes noticeable; it is the value of a sensory event (such as the wattage of a light or the volume of a radio) at which the environment is perceived as different.
- Absolute Threshold
- the statistically determined (avg.) minimum level of stimulation necessary to activate a given sensory system 50% of time
50% can see it
- difference threshold
- the amount of change necessary for an observer to report 50% of the time that a value of a stimulus (ex. A sound) has changed (louder/softer) or is different from another value (chirping of cricket rather than of a bird).
- 2 ways to test sensory perception thresholds
- method of limits (ascending or descending)
method of constant stimuli- varies in intensity random order Y or N if detected
- selective attention
- the purposeful focusing of conscious awareness on a specific stimulus or event in the environment to the (relative) exclusion of other stimuli or events
- electromagnetic radiation
- the entire spectrum of waves initiated by the movement of charged particles
gamma rays, x-rays, ultraviolet rays, visible light, infrared rays, radar, radio waves, microwaves, and AC currents.
- a multilayered network of neurons that line the back of the eyeball and generate signals in response to light.
captures the image
- the light-sensitive cells in the retina—the rods and the cones.
- primarily responsible for vision at low levels of illumination (dark)
not especially responsive to either fine details or variations in wavelength (color).
- primarily resp. for vision in bright light
- scotopic vision
- very low light, relies on rods
- receptive fields
- areas of the retina that, when stimulated, produce a change in the firing of cells in the visual system
- color depends on
- 3 dimensions
3) brightness- intensity
- Monocular depth cues 4
- 1) Interposititon (superposition)
2) Relative Size
3) Texture Gradient
4) Atmospheric Perscpective
motion parralax and kinetic depth effect
- law of pragnanz
- if objects can be grouped together, they will be
- Laws of Perceptual Organization
common fate principle
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