Opposites attract: the role of predicate dimensionality in preschool children's processing of negations.

Three experiments investigated the role of oppositional predicate dimensionality in four- and five-year-old children's processing of negation. In Experiment 1 children (37 four-year-olds, mean age 4;8, and 20 five-year-olds, mean age 5;9) were asked to produce opposites for common terms (e.g. 'big'). In Experiment 2 children (27 four-year-olds, mean age 4;8; 23 five-year-olds, mean age 5;9) were asked to make pictures corresponding to statements phrased as negations (e.g. The arrow is NOT pointing up). In Experiment 3, children were asked to evaluate a series of pictures made by 'another child' using materials and procedures similar to those used in Experiment 2. Preschool children made use of predicate dimensionality when producing negations but could accurately evaluate truth-values regardless of content. Children often recalled negated items as affirmations (usually corresponding to antipodal opposites), which suggests that children's use of predicate dimensionality contributes to non-classical processing.