Differences between formal constraints on a generative grammar and concepts of efficiency in transforming sentences provide different expectations regarding performance measures if the grammar is taken as a psychologically real model. To contrast these views, subjects were given sentences varying in voice, mood, and modality and asked to transform…

Proposes an alternative to transformational grammars, based on the notion that a grammatical system should be open to psycholinguistic interpretation, and disallowing grammatical transformations, dealing instead with the information content of sentence surface structure. (Author/AM)

This article criticizes a previous paper that stressed a transformational analysis of children's question acquisition. It is argued that a surface structure generalization analysis makes empirically correct predictions about mistakes both in acquisition of inverted word order and in the form of "wh" questions. (CHK)