Visual Sequence Repetition Learning is Not Impaired in Signing DHH Children.

Area of Science:

• Cognitive Development
• Linguistics
• Auditory Neuroscience

Background:

• The auditory scaffolding hypothesis proposes that auditory experiences are essential for developing domain-general sequence processing skills.
• Previous research suggested potential sequence processing impairments in deaf or hard-of-hearing (DHH) children, supporting this hypothesis.

Purpose of the Study:

• To investigate the validity of the auditory scaffolding hypothesis by comparing sequence processing abilities in DHH and hearing children.
• To identify factors influencing sequence processing in DHH children, including language modality and proficiency.

Main Methods:

• Administered a sequence processing task to 77 DHH children using American Sign Language (ASL) and 23 hearing monolingual children (ages 7-12).
• Controlled for age and nonverbal intelligence in performance comparisons.
• Analyzed the correlation between language comprehension (spoken and ASL) and hearing loss levels with sequence processing scores in the DHH group.

Main Results:

• No significant difference in sequence processing performance was found between DHH and hearing children after controlling for covariates.
• Neither spoken language comprehension nor degree of hearing loss predicted sequence processing abilities in DHH children.
• American Sign Language (ASL) comprehension scores positively correlated with sequence processing performance in the DHH group.

Conclusions:

• The findings do not support the auditory scaffolding hypothesis, as sequence processing deficits were not observed in DHH children.
• Proficiency in an accessible language, such as ASL, appears to be a more significant factor in developing sequence processing abilities than auditory experience.
• Developmental sequence processing may rely on accessible linguistic input rather than solely on auditory scaffolding.