Developmental Sequences in Perception and Interpretation of Ambiguous Sentences

Abstract

The present research assessed the normal development of ability to perceive and interpret lexical and syntactic ambiguities in 40 grade school children, 10 kindergarteners, 10 second-graders, 10 fourth-graders, 10 sixth-graders, and 10 college students. Eight lexically ambiguous, eight syntactically ambiguous, and four unambiguous control sentences were presented for interpretation of their alternatives in meaning. Each experimental sentence was associated with four pictorial choices. Significant increases in the ability to perceive and interpret the alternative meanings of the lexical ambiguities occurred at or before the fourth grade (mean age 10 yr., 0 mo.) while significant changes for the syntactic and deep-structure ambiguities occurred at or before the sixth grade (mean age 12 yr., 0 mo.). Reaction times proved significantly shorter for the unambiguous than for the ambiguous sentences but remained stable over the present age range with the exception that the median reaction times between first and second responses decreased significantly between second grade and college level. The findings suggest that the ability to process lexical ambiguities increases and stabilizes during the concrete operational stage while the ability to process syntactic ambiguities stabilizes during the formal operational stage (Piaget & Inhelder, 1969).