Question 1

Data concerning the distribution of stuttering in families of people who stutter suggest that stuttering runs in families due to genetic factors.

Accepted Answer

Research indicates that stuttering often occurs in families, suggesting a genetic component, as family members of people who stutter are more likely to stutter themselves.

Question 2

A child identified as a persistent stutterer is likely to have other persistent stutterers in his/her family.

Accepted Answer

Stuttering can have a genetic component, meaning it may run in families, so a child who stutters might have relatives who also stutter.

Question 3

For people who stutter, there has been evidence of abnormal activity in their speech movements during perceptually fluent speech.

Accepted Answer

Research has shown that individuals who stutter may exhibit atypical neural activity even when their speech appears fluent, indicating underlying differences in speech motor control.

Question 4

Voice onset time (VOT) and laryngeal reaction time (LRT) are essentially the same measure.

Accepted Answer

Voice onset time (VOT) measures the time between the release of a stop consonant and the onset of vocal cord vibrations, while laryngeal reaction time (LRT) refers to the time it takes for the larynx to respond to a stimulus. They measure different aspects of speech production.

Question 5

Speech motor studies have reported that PWS tend to have abnormally large tongue that interferes with its proper positioning for speech production causing disfluencies as the person struggles to move on.

Accepted Answer

There is no scientific evidence to support the claim that people who stutter (PWS) have abnormally large tongues that cause disfluencies. Stuttering is a complex speech disorder with various contributing factors, but tongue size is not one of them.

Question 6

Speech motor studies have reported that PWS tend to have tongues that is too weak, incapable of reaching far enough in the oral cavity.

Accepted Answer

Speech motor studies have not consistently shown that people who stutter (PWS) have weak tongues or that their tongues cannot reach far enough in the oral cavity. Stuttering is more related to neural and motor control issues rather than tongue strength or reach.

Question 7

Several investigations reported a much higher concordance for stuttering in monozygotic than in dizygotic twins.

Accepted Answer

Research has shown that monozygotic twins, who share nearly identical genetic makeup, have a higher concordance rate for stuttering compared to dizygotic twins, suggesting a genetic component to the disorder.

Question 8

If stuttering were purely genetic, then all twin pairs with one stutterer would have concordance.

Accepted Answer

If stuttering were purely genetic, then all twin pairs with one stutterer would have concordance because genetics would be the sole determinant of stuttering.

Question 9

Contrary to findings concerning adults who stutter, brain imaging with children did not show any brain matter differences between those exhibiting persistence in, and those who recovered from, stuttering.

Accepted Answer

Research has shown that there are indeed brain matter differences in children who stutter, similar to findings in adults, which can help predict persistence or recovery from stuttering.

Question 10

Early research concerning the genetics of stuttering employed the family incidence method. Describe and explain the method. What were the general findings of the many studies conducted in this area? What are the method's faults?

Accepted Answer

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Question 11

One approach to the investigation of the genetics of stuttering is twin studies. Describe/explain the method and the rationale behind it. What have been the general findings?

Accepted Answer

The answer of One approach to the investigation of the...

Question 12

The relatively early Cerebral Dominance theory implicated brain function as the cause of stuttering. Describe/explain the theory. In what ways do recent research findings indeed implicate the possible role of both brain structure and function in stuttering?

Accepted Answer

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Question 13

Discuss research advances and recent findings concerning brain structure and function in stuttering.

Accepted Answer

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Question 14

What are the indications for stuttering-audition links?

Accepted Answer

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Question 15

Discuss theories of motor disfunction in stuttering. What type of research evidence has been reported?

Accepted Answer

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Question 16

What are the different clinical implications to stuttering of its auditory links, motor links, and genetic links?

Accepted Answer

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Quiz 7: Is Stuttering Biological Theories and Investigations