In three studies, 5-10-year-old children and an adult comparison group judged another's certainty in making inductive inferences and guesses. Participants observed a puppet make strong inductions, weak inductions, and guesses. Participants either had no information about the correctness of the puppet's conclusion, knew that the puppet was correct,…

We compared the performance of twenty 5-7-year-olds on two spatial-temporal judgment tasks. In a semantic task, children located temporal distances from today that were described using conventional, temporal terms on a spatial timeline. In an autobiographical task, children judged temporal distances on the same spatial timeline for events that…

We compare the processing of transitive sentences in young learners of a strict word order language (English) and two languages that allow noun omissions and many variant word orders: Turkish, a case-marked language, and Mandarin Chinese, a non case-marked language. Children aged 1-3 years listened to simple transitive sentences in the typical…

This study explored age differences in preschoolers' temporal and social discounting and the association of these abilities. Research indicates that 4-year-olds are sensitive to rewards of differing magnitude (Lemmon & Moore, 2007). However, it is unclear whether preschoolers are able to consider length of time when making a choice to delay…

Using a new paradigm for measuring children's saving behaviors involving two marble games differing in desirability, we assessed whether 3-, 4-, and 5-year-olds saved marbles for future use, saved increasingly on a second trial, saved increasingly with age, and were sensitive to the relative value of future rewards. We also assessed whether…

Ownership is not a "natural" property of objects, but is determined by human intentions. Facts about who owns what may be altered by appropriate decisions. However, young children often deny the efficacy of transfer decisions, asserting that original owners retain rights to their property. In Experiment 1, 4-5-year-old and 7-8-year-old children…

This study compared the cognitive control skills of male incarcerated adolescents (n = 44), male control adolescents (n = 33), male incarcerated young adults (n = 41), and male control young adults (n = 35) using the AX-continuous performance test (AX-CPT). This test measures proactive control (the ability to maintain a mental representation of…

Fragile X syndrome is a common genetic disorder associated with executive function deficits and poor mathematics achievement. In the present study, we examined changes in math performance during the elementary and middle school years in girls with fragile X syndrome, changes in the working memory loads under which children could complete a…

Two studies compared the development of beliefs about the stability and origins of physical and psychological traits in Japan and the United States in three age groups: 5-6-year-olds, 8-10-year-olds, and college students. The youngest children in both cultures were the most optimistic about negative traits changing in a positive direction over…

We conducted a longitudinal analysis of the relative intensity and duration of interests associated with conceptual domains between the ages of 4 and 6 years, respectively. Results indicated a significant portion of preschool children do sustain an interest in conceptual domains during some portion of their childhood. Expected gender differences…

Examines children's variation in rate, style, and sequence of grammatical development, within and across natural languages. Using a sample of English and Italian infants, concludes that while there are structural differences between English and Italian that could affect the order in which nouns and verbs are acquired, no differences were observed…

Compared the use of conditional logic in adult-adult and adult-child conversation. Results indicated that conversation patterns and inferences were similar except that children made fewer independent inferences and shifts in taxonomic level and responded more frequently to socially controlling statements than did adults. (AA)