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Nonsymbolic Comparison in Deaf Students: No Evidence for a Deficit in Numerosity Processing
Deaf and hard of hearing (DHH) students show no basic numerical skill deficits. Their performance on quantity comparison tasks matched hearing peers, suggesting mathematical achievement delays may stem from other factors.
Area of Science:
- Cognitive Psychology
- Developmental Psychology
- Special Education
Background:
- Deaf and hard of hearing (DHH) students often exhibit delayed mathematical achievement.
- Basic numerical skills are foundational for mathematical development.
Purpose of the Study:
- To investigate the basic numerical skills of prelocutive DHH students.
- To compare the quantity comparison abilities of DHH students with hearing peers.
Main Methods:
- Two nonsymbolic quantity comparison tasks were administered.
- Participants included DHH students with cochlear implants and matched hearing students.
- Tasks varied in ratio and perceptual conditions.
Main Results:
- Both groups showed similar performance (accuracy, response times, ratio effects) in low perceptual conditions.
- DHH students exhibited slower response times in high perceptual conditions, likely due to strategy differences.
- No significant deficits in basic numerical skills were found in the DHH group.
Conclusions:
- DHH students do not possess inherent deficits in basic numerical skills.
- Performance differences may be influenced by task strategy rather than quantity representation.
- Further research should explore factors contributing to mathematical achievement gaps in DHH students.
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