On the basis of the grammatical theory developed by Noam Chomsky, it is reasonable to presume that the different parts of a sentence may not all be understood with equal facility and speed. One purpose of this study was to determine whether some of the grammatical relations within a sentence were understood more readily than others. Sentences of…

Examines the idea of a mismatch between grammaticality and acceptability. Evidence is used to refute the claim that ungrammatical but acceptable sentences are theoretically plausible in the case of the sentence, "A not unhappy person entered the room." (AMH)

The ability of 31 institutionalized trainable mentally retarded mongoloid and nonmongoloid subjects (mean IQ=27.5) to comprehend and imitate verbally presented sentences of varying levels of grammatical complexity was examined. Eight stimulus sentences were spoken for four pairs of pictures, simple declarative or kernel, negative, passive, and…