chapter 6 Flashcards
sensation
the awareness of properties of an object or event when a sensory receptor is stimulated
perception
the act of organizing & interpretting sensory input as a signaling particular object or event
psycho physics
-studies relationship between physical stimuli & the sensation & perception that those stimuli effect
thresholds
-absolute threshold: the strength or amount of a stimulus for you to detect if it is there (50% of time
the weakest amount of stimulus that a person can detect 50% of the time
threshold
aspects of vision
wavelength, frequency, amplitude
what is the structure of the eye?
pupil, iris, cornea, retina, fovea, optic nerve
aspects of the rods of an eye
100-200 million (out in peripherie)
super sensitive to light
only register shades of gray
aspects of cones of an eye
5-6 million (in the center)
sensitive to particular wavelengths
allow color to vision
difference threshold
the just noticeable difference.
the color video we did in class- how you had to find the color that was slightly different
absolute threshold
knowing something is there (a stimuli)
what is the just noticeable (JND) difference tested by?
Weber’s law
weber’s law
must differ by constant minimum % NOT amount (ex: weight must change by 2% before we can tell a difference)
what is the vision stimulus?
the photon
wavelengths
red are longer waves, blue are shorter waves with more frequency
light goes into the eye through what?
the pupil
short wavelengths or high frequency
blue and violets. high-pitched sounds
long low frequency
reds. low-pitched sounds
high amplitude
bright colors. louder
low amplitude, low frequency
dull colors. soft sounds
what is the colored muscle in the eye and aids to let light in?
iris- contracts or relaxes
what is the clear curvature of the eye, helps the light change its angle/refraction, and protects the eye
cornea