Podcast
Questions and Answers
In the UK, how many children are born deaf?
In the UK, how many children are born deaf?
1-2 out of every 1000 children
What are some common causes of hearing loss in children? (Select all that apply)
What are some common causes of hearing loss in children? (Select all that apply)
What is the treatment for mild to moderate hearing loss?
What is the treatment for mild to moderate hearing loss?
Hearing aids
What is the treatment for severe to profound hearing loss?
What is the treatment for severe to profound hearing loss?
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What do cochlear implants do?
What do cochlear implants do?
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Which of these factors are predictors of language outcome in children with hearing loss? (Select all that apply)
Which of these factors are predictors of language outcome in children with hearing loss? (Select all that apply)
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What was the main finding in the Ingvalson et al. study regarding vocab size?
What was the main finding in the Ingvalson et al. study regarding vocab size?
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By 7.5 months of age, infants can segment words using the predominant stress pattern of their native language.
By 7.5 months of age, infants can segment words using the predominant stress pattern of their native language.
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What is the Visual Habituation Paradigm?
What is the Visual Habituation Paradigm?
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What was the sample in the Segal, Houston, Kishon-Rabin study?
What was the sample in the Segal, Houston, Kishon-Rabin study?
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What was assessed in the Segal, Houston, Kishon-Rabin study? (Select all that apply)
What was assessed in the Segal, Houston, Kishon-Rabin study? (Select all that apply)
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Summarize the key findings of the Segal, Houston, Kishon-Rabin study.
Summarize the key findings of the Segal, Houston, Kishon-Rabin study.
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What is meant by audiovisual association?
What is meant by audiovisual association?
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What is the McGurk effect?
What is the McGurk effect?
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What is meant by multimodal perception?
What is meant by multimodal perception?
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Describe the sample in the Schorr et al. study.
Describe the sample in the Schorr et al. study.
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What happened in the Schorr et al. study?
What happened in the Schorr et al. study?
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Summarize the key findings of the Schorr et al. study.
Summarize the key findings of the Schorr et al. study.
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What is the Preferential Looking Paradigm?
What is the Preferential Looking Paradigm?
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Describe the procedure of the Preferential Looking Paradigm.
Describe the procedure of the Preferential Looking Paradigm.
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What was the aim of the Houston et al. study?
What was the aim of the Houston et al. study?
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Describe the sample in the Houston et al. study.
Describe the sample in the Houston et al. study.
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Summarize the key findings of the Houston et al. study.
Summarize the key findings of the Houston et al. study.
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What is shape bias?
What is shape bias?
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At what age do children typically develop shape bias?
At what age do children typically develop shape bias?
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What was the aim of the Perry et al. study?
What was the aim of the Perry et al. study?
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Study Notes
Word Learning in Children with Hearing Loss
- Prevalence of Deafness in the UK: Approximately 1-2 out of every 1000 children are born deaf.
Causes of Childhood Hearing Loss
- Infections
- Premature birth
- Low birth weight
- Birth injuries
- Maternal drug or alcohol use during pregnancy
- Maternal diabetes
- High blood pressure during pregnancy
- Genetics
Treatment Options
- Mild to Moderate Hearing Loss: Hearing aids
- Severe to Profound Hearing Loss: Cochlear implants
Cochlear Implants
- Stimulate auditory nerves with electrical impulses
- Provide a sensation of sound, but don't restore full hearing
Predictors of Language Outcome
- Audiological factors
- Demographic factors
- Environmental factors
- Language input
Vocabulary Size Study (Ingvalson et al.)
- Compared 31 children with normal hearing to 31 with hearing loss.
- Used Peabody Picture Vocabulary Test & a receptive one-word picture vocabulary test.
- Tested at 3-4 years and again 6 months later.
- Normal hearing children demonstrated larger vocabularies.
Word Segmentation by Infants
- By 7.5 months, infants can segment words based on predominant stress patterns.
- Studies used familiarization with words like "askingdom" and "hamlet"
Visual Habituation Paradigm
- A method to study infant discrimination of stimuli through measuring preferential looking times.
Segal, Houston, Kishon-Rabin Study
- Examined 20 children with cochlear implants (22-33 months old, 1-6 months CI use) and 48 normal hearing infants.
- Assessed habituation time to visual stimuli and look-away rate during habituation.
- Deaf infants habituated slower and had lower look-away rates compared to hearing infants.
- Infants with cochlear implants showed reduced discrimination of stress patterns.
Audiovisual Association
- Mapping sounds and disambiguating motion stimuli in noisy environments.
McGurk Effect
- A perceptual phenomenon where visual and auditory speech inputs interact, potentially leading to misperceptions.
- Visual input can override auditory information.
Multi-modal Perception
- Multiple senses working together to perceive the world.
Schorr et al. Study (McGurk Effect in Deaf Children)
- Involved children (5-14 years old) with profound deafness and a minimum of 1 year of CI experience, plus age-matched controls.
- Participants watched and listened to audiovisual stimuli and identified the perceived syllables.
- Congruent audiovisual stimuli ("pa", "ka") were correctly identified more reliably by normal-hearing children.
- For incongruent stimuli (McGurk effect), performance varied significantly among deaf children.
Preferential Looking Paradigm
- Used to measure infant/toddler looking/listening behaviors to stimuli.
- Children shown two pictures with a word spoken, and the focus is whether they choose the correct matching picture.
- Repeated trials determine if learning and memory occur.
Houston et al. Study (Word Learning in Deaf Children)
- Used intermodal preferential looking paradigm in a group of deaf children with cochlear implants (21-40 months) and age-matched controls.
- Tested their ability to learn novel word/object pairings.
- Normal hearing 12 month-olds couldn't reliably map words to objects; 18 months showed initial learning; 21 months demonstrated similar learning to normal-hearing controls. Children with earlier implants performed better
Shape Bias
- A tendency to generalize information about object shapes rather than other features (color, texture, etc.) when learning nouns.
Shape Bias Development
- Appears around 18 months of age.
Perry et al. Study (Shape Bias in Deaf Children)
- Tested whether deaf children (with CI or hearing aids) demonstrated shape bias during novel word learning, comparing vocabularies.
- Compared 20 children with hearing loss to age-matched and vocabulary-matched normal hearing controls..
- Children with hearing loss were less likely to generalize novel words to objects of the same shape.
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Description
This quiz explores the challenges and treatment options for children with hearing loss, including the prevalence of deafness and the impact of cochlear implants. It also examines the predictors of language outcomes and vocabulary development in children with hearing impairment. Test your knowledge on this critical topic!