PSYC 2000 EXAM QUESTIONS WITH COMPLETE SOLUTIONS GRADED A+
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Course
PSYC 2000
Institution
PSYC 2000
PSYC 2000 EXAM QUESTIONS WITH COMPLETE SOLUTIONS GRADED A+
What is subliminal perception? - Answer-stimuli acting on our unconscious mind to influence our behavior
What is habituation? - Answer-the tendency of the brain to stop attending to constant, unchanging information
What is sensory a...
PSYC 2000 EXAM QUESTIONS
WITH COMPLETE SOLUTIONS
GRADED A+
What is subliminal perception? - Answer-stimuli acting on our unconscious mind to
influence our behavior
What is habituation? - Answer-the tendency of the brain to stop attending to constant,
unchanging information
What is sensory adaptation? - Answer-the tendency of sensory receptors to become
less responsive to a stimulus that is unchanging
What is the difference between habituation and sensory adaptation? - Answer-
habituation is where your sensory receptors continue to be stimulated, whereas in
sensory adaptation, your sensory receptors are not being stimulated
What are the 3 properties of light? - Answer-color (hue), brightness, and saturation
(purity)
Light characteristics: Color - Answer-determined by wavelength (the distance between
wave peaks); long waves (red), short waves ( blue)
Light characteristics: Brightness - Answer-determined by amplitude (the height of the
wave); the higher the wave, the brighter
Light characteristics: Saturation - Answer-purity; determined by whether or how much
there is a mixture of wavelengths
How does information from our eyes become images we understand and process? -
Answer-Light enters the eye either directly or indirectly, then goes through cornea and
aqueous humor, then enters the interior of the eye through the pupil in the iris (which
allows more or less light into the eye by adjusting the pupil), the lens then finishes the
focusing process begun by the cornea, then the light passes through the vitreous
humor, and then the retina. The rods and cones turn photons of light into neural signals
for the brain sending them to bipolar cells and then to the retinal ganglion cells (whose
axons form the optic nerve).
Cornea - Answer-clear membrane that protects the eye and focuses most of the light
coming into the eye; has a fixed curvature; bends light waves so the image can be
focused on the retina
, Aqueous humor - Answer-a clear, watery fluid that is continuously replenished and
supplies nourishment to the eye
Pupil - Answer-a hole in the interior of the eye; iris opening that changes size depending
on the amount of light in the environment
Iris - Answer-the colored part of the eye; round muscle that controls the size of the pupil
Lens - Answer-clear structure suspended by muscles that changes shape to bring
objects into focus by changing from thick to thin
Vitreous humor - Answer-Jelly-like liquid that nourishes and gives shape to the eye
Retina - Answer-a light-sensitive area at the back of the eye; has three layers: ganglion
cells, bipolar cells, and special receptor cells (rods and cones)
Fovea - Answer-central area of retina; greatest density of photoreceptors
Optic nerve - Answer-sends visual information to the brain
Are there more rods or cones? - Answer-rods heavily outnumber cones
What are rods and cones and where are they more concentrated? - Answer-
photoreceptors
Cones: need more light to function; sensitive to different wavelengths of light;
responsible for color vision; more concentrated in the center
Rods: more concentrated in the periphery (not the fovea); not sensitive to a variety of
wavelengths; see only black, white, and shades of grey
What is visual accommodation? - Answer-the lens changing its shape from thick to thin,
enabling it to focus on objects that are close or far away
What is the blind spot in the eye? - Answer-point where optic nerve leaves the eye;
there are no receptor cells located here
Wha tis the trichromatic theory? - Answer-the human eye has 3 types of cone
photoreceptors (red, green, and blue) with differing sensitivities to different light
wavelengths (explains color blindness)
What is the opponent process theory? - Answer-based on the idea that there are 4
primary colors of vision (red with green and blue with yellow). If one member of a pair is
stimulated, the other member of the pair is inhibited (good with explaining "after images"
we see when we stare at something for a long time)
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