Distinctive features of consonantal errors in deaf children

Area of Science:

• Speech-language pathology
• Audiology
• Linguistics
• Cognitive science

Background:

• Deaf children often exhibit speech sound production errors.
• Understanding these errors is crucial for effective speech habilitation.
• Current interventions may not fully leverage all available speech signal features.

Purpose of the Study:

• To analyze consonantal substitution errors in deaf children.
• To identify acoustic and articulatory features influencing these errors.
• To evaluate the focus of current speech habilitation strategies.

Main Methods:

• Presented pictorial stimuli of 18 consonants in 3 vocalic positions to 10 deaf children.
• Phonetically transcribed all verbal responses.
• Utilized INDSCAL (Individual Differences Scaling) analysis on consonantal substitution errors.

Main Results:

• A 2-dimensional INDSCAL solution was identified.
• The solution primarily revealed features related to the place of articulation.
• This suggests place of articulation is a dominant factor in observed errors.

Conclusions:

• Speech habilitation for deaf children currently emphasizes place of articulation features.
• There is potential to improve speech production by incorporating other speech signal features.
• Further research should explore exploiting a wider range of phonetic features in therapy.