Exam 2 Flashcards
Transduction
Physical stimuli transferred into the brains language
Bottom up processing
Strongly shaped by sensory receptors, higher level of processing
Top down processing
Constructs perception from sensory input by drawing from experience and expectation
Sensation
Deals with stimuli and translating (trandsduction) that into your brains language
Perception
Integrating the stimuli into meaning,
Absolute Threshold
Minimum amount of stimuli needed to detect energy 50% of the time
Difference threshold
Smallest possible change that can be detected 50% of the time.
Subliminal Stimulus
Below the absolute threshold, the stimuli you do not detect. Can primed people but not persuade them.
Webers Law
A change must occur at a constant percent not amount in order to be detected. Depends on the stimuli to decide percent
Properties of waves
Wavelength frequency-determines color
short wave-high freq=bluish color
long wave-low frequency=reddish colors
Amplitude- brightness of colors
Great amp- bright colors
Small amp-dull colors
Receptor cells in the eye
Rods- sensitive to dim lighting and periphery motion
Cones- sees details, color logos and patterns well
Fovea
Where the cones cluster, it is the centeral focus located in the retina. Gives input to the visual cortex
Parts of the Eye
Iris- eye color,
Pupil- lets light in, dilates or
contracts
Lens-focuses image on retina changes curvature(accommodations)
Retina- inner surface of eye, where the image goes
Fovea- where the cones cluster, located in the retina, its central focus
Blindspot
Is cause by the lack of receptor cells. It is where the optic nerve leaves the eye
Feature detectors
Specialized neurons that receive info from ganglion cells, in the occipital lobe, responds to edges lines angles and movements
