Findings are presented from the first randomized control trial of the effects of encouraging symbolic gesture (or "baby sign") on infant language, following 40 infants from age 8 months to 20 months. Half of the mothers were trained to model a target set of gestures to their infants. Frequent measures were taken of infant language…

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…

Three experiments examined the relation between language acquisition and other symbolic abilities in 18- and 26-month-olds. Found that 18-month-olds spontaneously interpreted gestures, like words, as names for object categories. At 26 months, they spontaneously interpreted words as names and novel gestures as names only when given additional…

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…

Studied across a 16-month period, young children of deaf parents showed accelerated early language development, on the average producing their first recognizable sign at 8.5 months, their tenth sign at 13.2 months, and their first sign combination at 17.0 months. Findings are inconsistent with previously reported patterns of synchrony between…