The development of early vocalizations was investigated with 13 infants who had Down's syndrome and 27 infants developing normally, at bimonthly intervals from 4 to 18 months of age. Both groups demonstrated increased production of mature syllables over time as well as large variations in vocal development, both within and across groups and across…

Compares the effects of audio and audiovisual presentation on young children's cognitive processing while explicitly controlling the amount and complexity of information. (HOD)

Describes three experiments that tested autistic children's nonverbal and verbal categorization abilities. Concludes that autistic children do not suffer a specific cognitive deficit in ability to categorize and form abstract concepts. (HOD)

Examines the differential influence of pictorial vs. verbal forms on the comprehension of metaphor in younger (second grade) and older (fifth grade) children through their performance on the pictorial Metaphoric Triads Task. (HOD)