Psych 289 - Chapter 4 - Sensation and Perception Questions
With Complete Solutions
Absolute threshold Correct Answer The minimum amount of
stimulation that an organism can detect for a specific type of
sensory input.
Stimulus intensity detected 50% of the time.
Accommodation Correct Answer Occurs when the curvature
of the lends adjusts to alter visual focus
-when you focus on a close object, the lends of your eye gets
fatter (rounder) to give a clear image
-when you focus on distant objects, the lens flattens out to give
you a better image of the objects
Additive Colour Mixing Correct Answer Formation of
colours by superimposing lights, putting more light into the
mixture than exists in any one light by itself.
Afterimage Correct Answer A visual image that persists after
a stimulus is removed.
Ames Room Correct Answer A striking illusion that makes
use of misperception of distance
-specially contrived room built with a trapezoidal rear wall and a
sloping floor and ceiling. When viewed from the correct point,
as in the photo, it looks like an ordinary rectangular room, but in
reality, the left corner is much taller and much farther from the
viewer than the right corner creating bizarre illusions
- creates misperceptions by toying with the perfectly reasonable
assumption that the room is rectangular
,Amplitude Correct Answer Measured in decibels (dB);
loudness
Amplitude Correct Answer Perceived in loudness.
Measured in dB.
Principal determinant of loudness, but loudness ultimately
depends on an interaction between amplitude and frequency.
Auditory Localization Correct Answer Locating the source of
a sound in space.
Relies on 2 cues
-Intensity (loudness)
-timing of sounds arriving at each ear
Basilar membrane Correct Answer A structure that runs the
length of the cochlea in the inner ear and holds the auditory
receptors, called hair cells.
Hair cells are stimulated by waves in the fluid and they convert
it to neural impulses that are sent to the brain.
Binocular Depth Cues Correct Answer Clues about distance
based on the differing views of the two eyes.
Retinal Disparity
Convergence
Bottom-up Processing Correct Answer In form perception,
progression from individual elements to the whole.
, Buck and Axel Correct Answer Won the Nobel Prize in
Physiology or Medicine in 2004. When they discovered a gene
set consisting of 1000 different genes that affect the operation of
our olfactory receptor cells. They are highly specialized in that
each has the ability to detect only a very limited number of
odours.
-Humans can distinguish among 10,000 different odours;
however, when people are asked to identify specific odours (like
smoke or soap), they find it difficult
Closure Correct Answer Viewers tend to supply missing
elements to close or complete a familiar figure
Cochlea Correct Answer The fluid-filled, coiled tunnel in the
inner ear that contains hair cells - receptors for hearing.
Sound enters through oval window, which is vibrated by
ossicles.
Basilar membrane divides it into upper and lower chambers.
Colour Correct Answer Primarily a function of the dominant
wavelength in these mixtures.
It is a psychological interpretation, not a physical property of
light.
Affected by the three properties of light.
Colourblindness Correct Answer Deficiency in the ability to
distinguish among colours.
With Complete Solutions
Absolute threshold Correct Answer The minimum amount of
stimulation that an organism can detect for a specific type of
sensory input.
Stimulus intensity detected 50% of the time.
Accommodation Correct Answer Occurs when the curvature
of the lends adjusts to alter visual focus
-when you focus on a close object, the lends of your eye gets
fatter (rounder) to give a clear image
-when you focus on distant objects, the lens flattens out to give
you a better image of the objects
Additive Colour Mixing Correct Answer Formation of
colours by superimposing lights, putting more light into the
mixture than exists in any one light by itself.
Afterimage Correct Answer A visual image that persists after
a stimulus is removed.
Ames Room Correct Answer A striking illusion that makes
use of misperception of distance
-specially contrived room built with a trapezoidal rear wall and a
sloping floor and ceiling. When viewed from the correct point,
as in the photo, it looks like an ordinary rectangular room, but in
reality, the left corner is much taller and much farther from the
viewer than the right corner creating bizarre illusions
- creates misperceptions by toying with the perfectly reasonable
assumption that the room is rectangular
,Amplitude Correct Answer Measured in decibels (dB);
loudness
Amplitude Correct Answer Perceived in loudness.
Measured in dB.
Principal determinant of loudness, but loudness ultimately
depends on an interaction between amplitude and frequency.
Auditory Localization Correct Answer Locating the source of
a sound in space.
Relies on 2 cues
-Intensity (loudness)
-timing of sounds arriving at each ear
Basilar membrane Correct Answer A structure that runs the
length of the cochlea in the inner ear and holds the auditory
receptors, called hair cells.
Hair cells are stimulated by waves in the fluid and they convert
it to neural impulses that are sent to the brain.
Binocular Depth Cues Correct Answer Clues about distance
based on the differing views of the two eyes.
Retinal Disparity
Convergence
Bottom-up Processing Correct Answer In form perception,
progression from individual elements to the whole.
, Buck and Axel Correct Answer Won the Nobel Prize in
Physiology or Medicine in 2004. When they discovered a gene
set consisting of 1000 different genes that affect the operation of
our olfactory receptor cells. They are highly specialized in that
each has the ability to detect only a very limited number of
odours.
-Humans can distinguish among 10,000 different odours;
however, when people are asked to identify specific odours (like
smoke or soap), they find it difficult
Closure Correct Answer Viewers tend to supply missing
elements to close or complete a familiar figure
Cochlea Correct Answer The fluid-filled, coiled tunnel in the
inner ear that contains hair cells - receptors for hearing.
Sound enters through oval window, which is vibrated by
ossicles.
Basilar membrane divides it into upper and lower chambers.
Colour Correct Answer Primarily a function of the dominant
wavelength in these mixtures.
It is a psychological interpretation, not a physical property of
light.
Affected by the three properties of light.
Colourblindness Correct Answer Deficiency in the ability to
distinguish among colours.
