Experiments with groups of 30 children (aged 3 through 6) and 32 children (aged 5 through 8) showed that (1) children use linguistic form-class information with familiar discrete objects, (2) children do not use linguistic form-class information with familiar food, and (3) children use only object category information with unfamiliar items.…

Spontaneous full passives and related constructions from 234 children, aged 2 to 13, and elicited passives from 262 college students were analyzed. The agentive non-reversible did not appear until after age 9; and until age 11 no child produced both reversible and non-reversible passives. (Author/SW)

Focus is one factor that may account for children's use of single-word utterances after they have acquired the use of multi-word utterances. The possible role that focus may play in children's use of single-word utterances in naturalistic settings, after the acquisition of syntax, was investigated. (SW)

Ostensive definitions of words are ambiguities as to their referent. In a study of infant-mother dyads engaged in looking at picture books, 95 percent of ostensive definitions referred to the whole object depicted rather than parts, attributes, or actions. When parts were named, ambiguity was avoided by naming the part and the whole. (PJM)

The progressive inflection "-ing" appears to be the earliest verb inflection acquired by children learning English as their first language. Explanations are made on why the progressive is rarely, if ever, overgeneralized to inappropriate forms. (SW)

Investigates the development of past tense expressions in the speech of children from 1.6 to 2.6. It is shown that this development depends crucially on the child's cognitive construction of the time dimension, as described by Piaget. (Author/RM)

How a child answers questions provides information about how he or she processes input. A child's early responses to questions at age one year, three months, were compared to her responses at one year, seven months, when she was in the two-word stage. (SW)