Abstract
Investigated the effects of negation with respect to the postulated semantic sentence categories of informative (synthetic), redundant (analytic), contradictory, and amphigorous (nonsense, meaningless). Each of 30 undergraduates was given 156 affirmative and 156 corresponding negative sentences to interpret in terms of the 4 categories. Various systematic relations among the categories with regard to affirmative and negative sentences were established. When negated, affirmative sentences interpreted as informative, redundant, contradictory, and amphigorous were interpreted as informative, contradictory, redundant, and amphigorous/redundant, respectively. (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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