Question 1

Sensory adaptation is often referred to as:

Accepted Answer

Sensory adaptation refers to the decrease in sensitivity to a constant stimulus over time. Habituation is a form of sensory adaptation where the brain stops responding to a constant or repetitive stimulus. Therefore, choice C, habituation, is the best choice.

Question 2

The iris:

Accepted Answer

The answer of The iris:
...

Question 3

Absolute threshold is to difference threshold as:

Accepted Answer

Both absolute threshold and difference threshold are related to the detection of sensory stimuli. Absolute threshold refers to the smallest amount of stimulus energy needed for a person to detect a stimulus at least 50% of the time, while difference threshold (also known as just noticeable difference) refers to the smallest change in stimulus intensity that a person can detect. Therefore, the relationship between absolute threshold and difference threshold is that they both involve the detection and discrimination of stimulus energy, but at different levels of intensity or change.

Question 4

Weber's law suggests that the just noticeable difference (jnd)is related to the _____________ of the comparison stimulus.

Accepted Answer

Weber's law states that the jnd is a constant proportion of the magnitude of the comparison stimulus. This proportionality constant, known as the Weber fraction, varies depending on the sensory modality and the specific task. However, in general, the higher the intensity of the comparison stimulus, the larger the jnd will be.

Question 5

While conducting research in Africa,a scientist discovers a new species that is only active at night.We would expect this animal's light receptors to consist mostly of:

Accepted Answer

Rods are light-sensitive cells in the retina that are responsible for vision in low-light conditions, which would be beneficial for an animal that is only active at night. Cones, on the other hand, are responsible for color vision and work best in bright light conditions, so they would not be as useful for this particular species. Bars is not a relevant term in this context.

Question 6

It is easy to tell the difference between one pound of sand and five pounds of sand.It is more difficult to tell the differences between 500 pounds of sand and 505 pounds of sand.This comparison is consistent with ___________ law.

Accepted Answer

Weber's law states that the size of a just noticeable difference (JND) is proportional to the intensity of the stimulus. It means that the JND between two stimuli is not constant but depends on the intensity of the stimuli. In this case, the difference between one pound of sand and five pounds of sand is greater than the difference between 500 pounds of sand and 505 pounds of sand, which is consistent with Weber's law.

Question 7

When attempting to locate a constellation in the night sky,Sally notices that she can see the stars better if she doesn't look directly at them.In doing this,the light from the star she wishes to see falls away from the fovea to the part of the retina that has a higher concentration of ____________,which are better adapted to seeing at night.

Accepted Answer

Rods are specialized cells in the retina that are better adapted for low-light vision, while cones are specialized for color vision and higher light levels. Bars and pins are not relevant to the physiology of vision.

Question 8

Whether you are nearsighted or farsighted is largely dependent on the functioning of your:

Accepted Answer

The lens of the eye is responsible for focusing light onto the retina, which then sends signals to the brain to create an image. If the lens is too curved, causing light to focus in front of the retina, you are nearsighted. If the lens is not curved enough, causing light to focus behind the retina, you are farsighted. Therefore, the functioning of the lens determines whether you are nearsighted or farsighted.

Question 9

The process of sensory adaptation implies that the human nervous system is most sensitive to ____________ stimuli.

Accepted Answer

Sensory adaptation refers to the diminished sensitivity to a stimulus as a consequence of constant exposure to it. The human nervous system is therefore most sensitive to changing stimuli, as it tends to ignore stimuli that remain constant over time to focus on changes in the environment that may require attention or action.

Question 10

Vision is based on the eye's interpretation of:

Accepted Answer

Vision is based on the eye's interpretation of electromagnetic energy in the form of visible light. The eye is able to detect different wavelengths of light which are interpreted by the brain as colors.

Question 11

In the eyes,the following are the colour receptors and function best in bright illumination:

Accepted Answer

The cones are the colour receptors and function best in bright illumination. Rods are responsible for detecting light and dark, while bars are not a type of photoreceptor in the eyes. Pins is not a term used to describe the photoreceptors in the eyes.

Question 12

Sensory adaptation is the:

Accepted Answer

Sensory adaptation refers to the decrease in sensitivity to a constant or unchanging stimulus over time. This allows the sensory system to focus on detecting new or changing stimuli that may be more relevant to survival or behavior.

Question 13

Which of the following would be a benefit of sensory adaptation?

Accepted Answer

Sensory adaptation allows us to filter out mundane and unchanging stimuli and focus on the important changes in our environment. This helps us to conserve energy and resources and optimize our ability to detect important changes in our surroundings.

Question 14

In the human eye,light is focused on the back of the retina by the:

Accepted Answer

The lens is responsible for refracting or bending the light and focusing it onto the back of the retina. The iris controls the size of the pupil, allowing more or less light to enter the eye. The cornea is the clear outer layer of the eye that helps to refract light, but it does not have the ability to adjust its shape to focus light.

Question 15

The visual receptors in the eyes function best in dim lighting and are primarily black-and-white brightness receptors.These are called ________________.

Accepted Answer

The statement describes the function of rods, which are the visual receptors in the eyes that function best in dim lighting and are black-and-white brightness receptors. Cones are responsible for color vision and function best in bright lighting conditions. The fovea is a small area in the center of the retina where cone density is highest. Ganglion cells are responsible for transmitting visual information from the retina to the brain.

Question 16

The difference threshold is often referred to as:

Accepted Answer

The difference threshold is also known as the just noticeable difference (JND), which is the minimum difference necessary for a person to detect a change in stimulus intensity. It is not the same as the absolute threshold (A), which is the minimum intensity necessary for a person to detect a stimulus at all. It is also not the same as the apparent difference (B) or boundary threshold (D), as these terms do not specifically refer to the minimum threshold necessary for detection of a difference.

Question 17

The size of the __________ regulates the amount of light that enters the eye.

Accepted Answer

The pupil is the opening in the middle of the iris that can dilate or constrict to regulate the amount of light that enters the eye. The size of the sclera refers to the white outer layer of the eye, while the retina is the inner layer of the eye where light is converted into neural signals. The optic nerve sends those signals from the eye to the brain.

Question 18

One of the primary advantages of Weber fractions is that they:

Accepted Answer

Weber fractions allow for sensitivity comparisons between the different senses. They are not used to estimate absolute threshold or manipulate decision criteria, nor do they minimize false alarms.

Question 19

Weber's law states that the difference threshold is directly proportional to the ____________ of the stimulus with which a comparison is being made.

Accepted Answer

Weber's law states that the difference threshold is directly proportional to the magnitude of the stimulus with which a comparison is being made. This means that the larger the stimulus, the more of a difference is needed in order for us to perceive a change.

Question 20

Based on the principles of sensory adaptation,which of the following would you expect to experience after being in a (somewhat)cold pool for several minutes?

Accepted Answer

Sensory adaptation refers to the phenomenon where our sensitivity to a constant stimulus decreases over time. In this case, being in a cold pool for several minutes would result in sensory adaptation, meaning that we become less sensitive to the cold temperature and notice it less and less. This is why after some time in the cold pool, we may feel more comfortable and begin to acclimate to the temperature.

Quiz 5: Sensation and Perception