Question 1

A combination of preference for using hand, foot, eye, and ear is referred to as

Accepted Answer

A

Question 2

About _____ percent of people are strongly right- or left-handed with the rest showing some inconsistency in hand preference.

Accepted Answer

B

Question 3

Nic tends to gesture more with his right hand when he talks.Nic probably processes language

Accepted Answer

Most people process language in their left hemisphere, which is also usually responsible for controlling the right side of the body. Therefore, Nic's right hand gestures suggest that his left hemisphere is dominant for language processing.

Question 4

Regarding speech and language processing by left-handers, which of the following statements is TRUE?

Accepted Answer

While the majority of right-handers process language in the left hemisphere of their brains, there is more variability in the way left-handers process language. Some left-handers do use the right hemisphere for language processing, but others use both hemispheres of the brain to varying degrees. This suggests that left-handers may have a more flexible neural organization for language processing, which could have advantages in certain situations. Therefore, choice D is the true statement.

Question 5

To assess the degree to which one is right-handed or left-handed, you would most likely use the

Accepted Answer

The Waterloo Handedness Questionnaire is a common tool used to assess handedness. This questionnaire asks individuals about their preference for various activities such as writing or throwing a ball, and the resulting score indicates the degree to which one is right-handed or left-handed. The other options listed are personality measures and do not specifically assess handedness.

Question 6

Which of the following is most likely to indicate hemispheric dominance?

Accepted Answer

The answer of Which of the following is most likely...

Question 7

_____ is considered the single most important behavioral indicator of sideness.

Accepted Answer

Handedness, or preference for using one hand over the other, is generally considered the most important behavioral indicator of laterality or side dominance in humans. While other indicators, such as eye or ear preference, can also be used to determine side dominance, handedness is the most consistently reliable and widely studied indicator.

Question 8

The left hemisphere is dominant for language function in

Accepted Answer

The left hemisphere is dominant for language function in most right-handers and most left-handers. While left-handers are more likely to have more distributed language function across both hemispheres, the vast majority (around 90%) still show left hemisphere dominance for language.

Question 9

The right hemisphere is dominant for language for

Accepted Answer

Although the vast majority of people (about 97 percent) have left-hemisphere dominance for language, a small percentage of left-handed individuals (about 19 percent) and an even smaller percentage of right-handed individuals (about 3 percent) have right-hemisphere dominance for language. Therefore, neither A nor B is entirely correct, and D is incorrect as well.

Question 10

Among humans, about _____ percent are right-handed.

Accepted Answer

Approximately 90% of humans are right-handed. This has been consistently observed across different cultures and geographical regions.

Question 11

The only sure way to check brain dominance is to perform a medical test that involves

Accepted Answer

Anesthetizing one cerebral hemisphere at a time is the only medical test that can determine brain dominance with certainty. This is because it allows researchers to observe how each hemisphere reacts independently and determine which one is dominant for specific functions. Deep lesioning and ablation are invasive procedures that are not commonly used for this purpose, and karotyping and DNA analysis are not effective in determining brain dominance.

Question 12

One's dominant hemisphere is considered the side of a person's brain that

Accepted Answer

The dominant hemisphere of the brain is typically the left hemisphere for about 90% of right-handed people and 70% of left-handed people. This hemisphere is responsible for language processing, including speech production and comprehension.

Question 13

Clear hand preferences can be determined

Accepted Answer

Research has shown that hand preferences can be observed in fetal ultrasound images, indicating that such preferences can be determined before birth.

Question 14

Right-handed individuals who write with a straight hand and lefties who write with a hooked hand are usually

Accepted Answer

The hand positions described in the question are associated with different hemispheric dominance for language processing. Writing with a straight hand typically indicates left-brain dominance for language, while writing with a hooked hand typically indicates right-brain dominance. There is no evidence to suggest that these hand positions are related to intelligence.

Question 15

Although handedness is a matter of degree, overall it can be said that _____ percent of all humans are right-handed, while _____ percent are left-handed.

Accepted Answer

Approximately 90% of humans are right-handed, while about 10% are left-handed.

Question 16

Left-handed individuals who write with their hand below the writing line, and righties who use a hooked position in writing are usually

Accepted Answer

The answer of Left-handed individuals who write with their hand...

Question 17

Among humans, about _____ percent are left-handed.

Accepted Answer

Approximately 10 percent of the human population is left-handed.

Question 18

If you gesture more with your left hand, you probably process language

Accepted Answer

The left side of the brain controls the right side of the body and vice versa. Language processing is primarily controlled by the left hemisphere in most people. Therefore, if someone gestures more with their left hand, it suggests that their right hemisphere is more active during language processing.

Question 19

Regarding hand preferences, which of the following statements is/are TRUE?

Accepted Answer

Prenatal hand preferences have been observed to persist into childhood. Forcing a left-handed child to switch hands can lead to developmental issues, including speech or reading problems. Therefore, all statements are true.

Question 20

Lynn tends to almost always lean her head to the right when she is kissing her boyfriend Mike.When using a microscope at work, Lynn tends to use her right eye and even breathes better through her right nostril.Lynn's right preference illustrates

Accepted Answer

Lynn's consistent preference for using her right side for various tasks suggests a phenomenon known as sidedness, or lateralization. This refers to the tendency for certain functions to be primarily located in one hemisphere of the brain or one side of the body. It is a common aspect of human biology and can be seen in a variety of behaviors, such as handedness, footedness, and eyedness. Neuroplasticity refers to the brain's ability to change and adapt over time, and while this may be a factor in some cases of sidedness, it is not the primary concept at play here. Acquired hemispherization refers to cases in which one hemisphere of the brain becomes dominant due to injury or other factors, which is not indicated in the scenario. Preferential lateralization is not a commonly used term and does not accurately capture the concept at play here.

Quiz 2: Extension C: Brain and Behavior