Children with autism spectrum disorder (ASD) who have native exposure to a sign language such as American Sign Language (ASL) have received almost no scientific attention. This paper reports the first studies on a sample of five native-signing children (four deaf children of deaf parents and one hearing child of deaf parents; ages 4;6 to 7;5)…

We first review the mirror-system hypothesis on the evolution of the language-ready brain, stressing the important role of imitation and protosign in providing the scaffolding for protospeech. We then assess the role of social interaction and non-specific knowledge of language in the emergence of new sign languages in deaf communities (focusing on…

Learning to read is a major obstacle for children who are deaf. The otherwise significant role of phonology is often limited as a result of hearing loss. However, semantic knowledge may facilitate reading comprehension. One important aspect of semantic knowledge concerns semantic categorization. In the present study, the quality of the semantic…

This study investigated the preservation of second formant transition acoustic cues to intelligibility in speech produced during simultaneous communication (SC) from a locus equation perspective with 12 normal hearing, experienced sign language users. Results were consistent with previous research indicating that temporal alterations produced by…

We examined the influence of sign language iconicity on children's ability to describe the function of objects. Forty-eight hearing preschoolers were divided into three groups and asked to describe the function of 15 high and 15 low iconic signs. We questioned the Hearing/Verbal (H/V) group verbally, Hearing/Verbal+Sign (H/V+S) group verbally with…

Five profoundly deaf adults were recorded reading lists of individual words under three expressive modes (speech alone, speech and signs, and speech with cues). Results indicated that speech with cues produced the highest level of intelligibility, speech and signs the lowest. (Author/CL)

This study investigated the perception of voice onset time (VOT) in speech produced during simultaneous communication (SC). Four normally hearing, experienced sign language users were recorded under SC and speech alone (SA) conditions speaking stimulus words with voiced and voiceless initial consonants embedded in a sentence. Twelve…

A study involving 12 hearing sign language users examined the effect of the signing task on temporal features of speech during simultaneous communication (SC). Results indicated longer sentence duration for SC than speech-only conditions, and longer anticipatory duration of the diphthong and interword interval preceding the experimental words.…

A study involving 20 listeners investigated the potential influence of alterations in the temporal structure of speech produced during simultaneous communication on the perception of final consonant voicing. Results found that accurate perception was not impaired by the durational changes accompanying the typically slower speech pattern of…

A study investigated prosodic variables of syllable stress and intonation contours in speech produced during the simultaneous communication (SC) of ten hearing sign language users. Results indicated longer sentence duration for SC than speech only conditions. Vowel duration and frequency differences between stressed and unstressed syllables were…

Studies of American Sign language including functional magnetic resonance imaging of deaf signers confirms the importance of left hemisphere structures in signed language, but also the contributions of right hemisphere regions to sign language processing. A case study involving cortical stimulation mapping in a deaf signer provides evidence for…

Fifty-seven college students enrolled in their first week of introductory manual communication classes demonstrated limited ability to assess their own communication skills. A discussion of sign systems, interpreter skills, and ethics aided some students in putting their skills into perspective, but 41% continued to overestimate their abilities at…

This study investigated the acoustical and perceptual characteristics of vowels in speech produced during simultaneous communication (SC). Twelve normal hearing, experienced sign language users were recorded under SC and speech alone (SA) conditions speaking a set of sentences containing monosyllabic words designed for measurement of vowel…

Acquisition of the location aspect of American Sign Language signs was examined in nine young hearing infants and toddlers of deaf parents. Sign locations, overall, were produced with 83.5% accuracy. Highly contrasting locations were acquired first. Location played a central role in young children's early sign language acquisition. (Author/DB)

Students who are deaf or hard of hearing (n=231) used the Language Background Questionnaire (LBQ) to self assess their sign language and spoken communication skills. Formal independent estimates of these skills were also conducted. Comparison of results indicates a high degree of congruence between the self and formal assessments, which…