On the young child's use of lexis and syntax in understanding locative instructions

The ability of two and three year old children to comprehend in, on and under was tested in five contexts. In the first context, where responses did not depend on the child manipulating the experimental objects, responses were invariably correct except for some difficulty with under in the youngest subjects. In the other four contexts, which did involve manipulation of the objects by the child, responses varied as a function of the noun phrases used to refer to the experimental objects which themselves remained the same across different contexts. The result suggest that the young child's comprehension of instructions involves an interaction between aspects of the instruction's lexis and syntax and the child's construal of context.