Although theory of mind (ToM) is argued to emerge between 3 and 5 years of age, data from non-Western, small-scale societies suggest diversity. Deeper investigations into these settings are warranted. In the current study, over 400 Melanesian children from Vanuatu (range = 3-14 years), growing up in either urban or rural remote environments,…

The normative rule began to predominate at age 10 and was the only rule employed by 13-year-olds. In contrast, almost all 7-year-olds simplified the equalization task to an ordinal level. Four different nonalgebraic rules were identified. Neither young children's tendency to simplify nor older children's capacity to quantify could be detected in…

Acquisition of sentient-nonsentient distinction in 48 children between four- and seven-years-of-age occurred later than animate-inanimate distinction. The children's use of naturalistic or nonnaturalistic explanations depended on the logical nature of events in which objects were involved rather than familiarity with objects themselves. Ability to…

Investigates development of mathematical concepts among West African children from an agricultural tribe (Baoule) and a merchant society (Dioula). Baoule and Dioula children at three age levels participated: Preschoolers, 5-6 years; 7- to 8-year-olds with one year of school; and schooled and unschooled 9- to 10-year-olds. Experimental tasks…

Results of three experiments suggest that, in contrast to the claims made by Wimmer and others (1988), three- and four-year-old children understand that looking leads to knowing. The three- and four-year-olds' difficulty in the study lay mainly in the form of the questions that they were asked. (RH)

A longitudinal study of young children's conceptions of money and its value was conducted among 80 subjects between the ages of 3 and 8 years. The research was conducted within the framework of Piagetian theory using the "critical method." Results demonstrate that the development of the notions under investigation proceeds in six…

Examines language effects in class-inclusion performance with 224 children ages 3 through 12 by comparing the standard Piagetian question with two alternate question forms. Overall, the findings were inconsistent with the Piagetian assertion that logical inability produces errors in comparing subclasses; inclusion performance was a function of…

Children of the Baka, a preliterate society of Pygmies in southeast Cameroon, were tested for their conception of mind. Several studies conducted in other countries were reviewed. Results provide support for the claim that belief-desire reasoning is universally acquired in childhood. (GLR)

Four- and five-year-old children were asked to compare the burning times of pairs of partially synchronous lights differing in intensity, bulb size, or both. (Author/MP)

Preschool children were asked to choose the figure most resembling a real man from three figures drawn according to formulas used by children to depict humans. Results suggest development of drawing systems influences children's conceptions about objects or events. (Author/DB)

This study examined 6- to 8-year-old Slovenian children's acquisition of matrix completion proficiency and compared microgenetic and age-related changes on the task. Microgenetic analyses indicated that: variability of children's errors increased before they discovered the correct strategy, the correct strategy became dominant shortly after…

Autistic children were tested on three tasks that were within the capability of three-four-year-old normal children and that involved the abilities to understand a mistaken belief, infer contents of a container from looking or not looking inside, and adjust answers to provide new information. (PCB)

Examined Korean second and third graders' understanding of multidigit addition and subtraction. Korean children showed exceptional competence in multidigit addition and subtraction, and their solutions were based on quantitative understanding of multidigit numbers. Results are compared to the literature on the performance and conceptual structures…

A sample of 838 children ages 5 through 15 years in Australia, England, North America, and Sweden were interviewed about physical and sexual development. The study covers essentially the same area as Bernstein and Cowan (1975) but extends the sample on the dimensions of age, number, randomness, and comparisons made. (Author/RH)

Two studies indicate that Oksapmin children progress from premediational to mediational phases in their use of body parts to compare and reproduce number and that this change generally occurs prior to the development of concepts of number conservation. A third study shows that this general change is manifested in culturally specific ways.…