Two studies of 100 children aged 3-12 years examined theory of mind (ToM) understanding via explanations and predictions in hearing preschoolers and ToM-delayed deaf children. Study 1's 75 children (31 deaf; 44 hearing) displayed an "explanation advantage," devising valid epistemic ToM explanations despite failing simpler forced-choice…

Over their 1st year of life, infants' "universal" perception of the sounds of language narrows to encompass only those contrasts made in their native language (J. F. Werker & R. C. Tees, 1984). This research tested 40 infants in an eyetracking paradigm and showed that this pattern also holds for infants exposed to seen language--American Sign…

A comparison of vocal development in deaf and hearing infants indicates that well-formed syllable production is established in the first 10 months of life by hearing infants but not by deaf infants, suggesting that audition plays an important role in vocal development. (PCB)

One experiment determined that the minimum angle at which infants can discriminate 2 sound presentations decreases substantially toward 48 weeks of age. In 3 succeeding experiments, infants aged 16, 20, and 28 weeks were able to discriminate sounds presented to each ear between 50 and 75 microseconds apart. (BC)

Investigated associations between expressive language and symbolic play in deaf children with deaf parents or with hearing parents, and hearing children with hearing parents. Defined three language level groups. Hearing status was associated with duration of symbolic play. Higher language levels were associated with more canonically sequenced and…

Examines the ethnic, age, and gender playmate perferences of deaf and hearing preschoolers who were observed during outdoor free play at their respective schools over a 7-month period. Hispanic, black, and white children were included. (HOD)