Previous research has reported instances in which some two-year-olds failed to overextend in comprehension what they overextended in use. Fremgen and Fay found no instance of overextension in comprehension in separate experiments. From this Fremgen and Fay conclude children never overextend in comprehension. This conclusion is re-evaluated here.…

Reports a study which examines some of the properties of objects to determine whether the number of different examples of an object concept presented to infants influences concept learning and generalization and to discover whether children's behavior and language in relation to new objects influence learning the concept and generalization to new…

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)