Question 1

A(n)_____ is the smallest intensity of a stimulus that must be present for the stimulus to be detected.

Accepted Answer

The smallest intensity of a stimulus that must be present for the stimulus to be detected is known as the absolute threshold.

Question 2

The function relating the value of a stimulus along some dimension to the just noticeable difference is known as _____ law.

Accepted Answer

Weber's law relates the value of a stimulus along some dimension (e.g. brightness, loudness) to the just noticeable difference. It states that the just noticeable difference is a constant fraction of the original stimulus value, rather than a constant amount. This law is named after Ernst Weber, a German physiologist, who first formulated it in the 19th century.

Question 3

Anna is reading her psychology text.The activation of receptors in her retina by a source of physical energy is called _____.

Accepted Answer

The activation of receptors in the retina by a source of physical energy is known as sensation. Perception involves the interpretation and organization of sensory information in order to understand and interact with the world around us. Integration refers to the process of combining sensory information from multiple sources. Interpretation involves assigning meaning to sensory information based on prior knowledge and experience.

Question 4

Which of the following statements is TRUE of sensation and perception?

Accepted Answer

Sensation refers to the activation of sense receptors and the transmission of sensory information to the brain. Perception involves the interpretation and processing of that sensory information. Therefore, option D is the correct answer. Option A is false because sensation always precedes perception. Option B is false because sensation and perception are distinct processes. Option C is also false because sensation does not involve interpretation; it simply involves the stimulation of sensory receptors.

Question 5

A(n)_____ threshold is the stimulus intensity that is detected 50% of the time.

Accepted Answer

The absolute threshold is the minimum intensity of a stimulus that can be detected by an organism 50% of the time.

Question 6

"It's so noisy! How can you stand it?" remarks Caitlyn as the thruway traffic screams past her friend Dave's ground floor apartment."I don't even notice it anymore," Dave replies.This exchange best exemplifies the concept of:

Accepted Answer

The exchange between Caitlyn and Dave shows how Dave has adapted to the noise and no longer perceives it as bothersome, which is characteristic of the concept of adaptation. Accommodation refers to changing one's cognitive structures to fit new information, acclimation refers to adjusting to a new environment, and attenuation refers to decreasing the strength or intensity of a signal. None of these concepts apply to this specific scenario.

Question 7

_____ is a basic law of psychophysics stating that a just noticeable difference is a constant proportion to the intensity of an initial stimulus.

Accepted Answer

Weber's law is the basic law of psychophysics stating that a just noticeable difference (JND) is a constant proportion to the intensity of an initial stimulus. This means that the JND increases as the intensity of the stimulus increases. Weber's law is important in understanding sensory perception, as it explains why we are able to detect small changes in low-intensity stimuli but require much larger changes to detect differences in high-intensity stimuli.

Question 8

The sorting out,interpretation,analysis,and integration of stimuli by the sense organs and brain is known as _____.

Accepted Answer

Perception involves the higher-level cognitive processes that are involved in organizing and interpreting sensory information. Sensation refers to the initial process of detecting and encoding sensory information from the environment. Activation and Stimulation are not specific terms related to the process of sensory processing and perception.

Question 9

Which of the following laws would help explain why a person in a quiet room is more startled by the ringing of a telephone than a person who is already in a noisy room?

Accepted Answer

Weber's law explains the principle of just noticeable difference, which states that the ratio of the increment threshold to the background intensity is constant. In the context of the question, this means that a person in a quiet room will notice the ringing of a telephone more than someone in a noisy room because the relative increase in intensity is greater for the person in the quiet room.

Question 10

Weber's law states that a just noticeable difference is a _____.

Accepted Answer

According to Weber's law, a just noticeable difference (JND) between two stimuli is proportional to the magnitude of the stimuli. This means that the JND is not a fixed value but rather a constant proportion of the intensity of the initial stimulus.

Question 11

Acme Foods wants to make its chips saltier,but it doesn't want to spend more than it has to on salt.A sample of consumers are asked to compare its current chip (saltiness = 100)with saltier versions and to say whether the new version is saltier.On average,sample consumers reliably say the new chip is saltier when its saltiness value is 108,but not when its saltiness value is below 108.Assuming Acme Foods' sample consumers are representative of people in general,which of the following best represents the just noticeable difference for saltiness?

Accepted Answer

The just noticeable difference (JND) for saltiness can be calculated by finding the smallest difference in saltiness that results in a noticeable change in perception for the majority of consumers. Based on the given information, the JND for saltiness is 8 (saltiness value of 108 - saltiness value of 100), which represents an 8% increase in saltiness. Choice A is the only option that represents a percentage increase and aligns with the JND calculation.

Question 12

Which of the following most closely approximates the meaning of the term noise as psychophysicists use it?

Accepted Answer

Psychophysicists use the term "noise" to refer to any distracting stimuli, not just unwanted auditory stimuli. Noise can refer to any stimuli, including visual or tactile, that interfere with the perception of other stimuli or have no relevance to the task at hand.

Question 13

The smallest level of added or reduced stimulation required to sense that a change in stimulation has occurred is known as the _____.

Accepted Answer

The difference threshold, also known as the just noticeable difference, is the smallest level of added or reduced stimulation required to sense that a change in stimulation has occurred. It is often tested by presenting two stimuli and asking whether the person can tell the difference between them. The absolute threshold, on the other hand, is the minimum amount of stimulation necessary for a person to detect a stimulus 50% of the time, and the adaptation threshold refers to the point at which the stimulus is no longer perceived due to prolonged exposure. The term "intensity threshold" is not commonly used in psychology.

Question 14

The activation of the sense organs by a source of physical energy is known as _____.

Accepted Answer

Sensation refers to the process of detecting a physical stimulus such as light or sound and converting it into neural signals that can be interpreted by the brain. Perception, on the other hand, involves the interpretation of these signals and the creation of an internal representation of our external environment. Integration and interpretation are later stages in the processing of sensory information.

Question 15

A snack manufacturer realizes that he must increase the salt content of his company's chips by 3% in order for a sample of consumers to notice that the chips are saltier than they were before.This example most nearly illustrates the concept of a(n):

Accepted Answer

The situation described in the question is an example of a difference threshold, which represents the minimum difference in stimulation that can be detected by an individual. In this case, the minimum difference in salt content needed for consumers to notice the change is the 3% increase. This is different from the absolute threshold, which is the minimum level of stimulation needed for a person to detect a sensory experience, and the frequency threshold, which relates to the minimum frequency of a sound or light that can be detected. The adaptation threshold relates to the decreasing sensitivity of an individual to a continuous stimulus over time.

Question 16

_____ is an adjustment in sensory capacity after prolonged exposure to unchanging stimuli.

Accepted Answer

Adaptation is a process in which the body adjusts to prolonged exposure to unchanging stimuli by reducing the sensitivity of receptors. This results in a decreased response to the stimulus over time. Accommodation refers to the ability of the eye to adjust its focus for objects at different distances. Acclimation refers to the process of adjusting to a new environment or situation over time. Attenuation refers to the reduction in intensity or strength of a signal as it travels through a medium.

Question 17

Dr.Breiland examines the relationship between the physical properties of light,such as its amplitude and wavelength,and humans' perception of color.Which of the following terms MOST ACCURATELY describes Dr.Breiland's field of study?

Accepted Answer

Psychophysics is the study of the relationship between physical stimuli and the psychological responses they evoke. In this case, Dr. Breiland is specifically studying how physical properties of light relate to the perception of color, making psychophysics the most accurate field of study for her research.

Question 18

The study of the relationship between the physical aspects of stimuli and our psychological experience of them is known as _____.

Accepted Answer

Psychophysics is the study of the relationship between the physical aspects of stimuli and our psychological experience of them. Developmental psychology studies how people change and grow over their lifespan. Thermodynamics is a branch of physics that deals with the relationships between heat, energy, and work. Experimental psychology is the scientific study of behavior and mental processes through experimentation.

Question 19

In regards to what we see in our world,the range of wavelengths that humans are sensitive to is called the _____.

Accepted Answer

The visible range of wavelengths that humans are sensitive to is called the visual spectrum. The other options are not related to the range of wavelengths that humans can see.

Question 20

One can detect a single drop of perfume diffused in an area the size of a one-bedroom apartment.This is due to:

Accepted Answer

Absolute threshold is the minimum amount of stimulus energy required to detect a stimulus 50% of the time. In this scenario, the ability to detect a single drop of perfume in a large area suggests a very low absolute threshold, which is the level of sensitivity required to detect such a small amount of stimulus.

Quiz 3: Neuroscience and Behavior

A(n) _____ is the smallest intensity of a stimulus that must be present for the stimulus to be detected.