Results showed that, contrary to predictions based on standard models of the logical time concept, long and short conditions were easier for children to solve than the traditional four- versus seven-second condition. Children were able to solve problems that are logically impossible to solve on the basis of nontemporal information. (Author/RH)

Six year olds and college students were given two or four conceptual problems to solve, the number of rules within the series of problems being either one or two. Number of rules and the interaction of number of rules and age of subject were found to be significant variables. (CS)

Two experiments investigated why perceptual pretraining facilitates children's performance on concept problems involving a nonpreferred relevant dimension and preferred irrelevant dimensions. (JMB)

To evaluate prevalence of perseveration in early search, nine-month-olds were tested on both two- and three-location version of Piaget's AB task. Three principal findings emerged: (1) infants did not show systematic perservation on either location task; (2) they did demonstrate positive search skills; and (3) they searched using similiar methods…

Nine- to 18-month-old infants were presented with simple two-location manual search tasks involving invisible displacements of objects with sequence of displacements occurring before infants search. Results provided insights into age differences associated with development of logical search strategies, information-processing skills, and temporal…

In this review, it is suggested that language influences the young child's thinking and behavior at an age earlier than commonly reported. Three areas are discussed: concept formation, communication, and problem solving. (CS)

Observed gesture and speech to investigate patterns of change in third and fourth graders' strategies for solving mathematical equivalence problems before and after an intervention. Children who received instruction were more likely to generate new strategies. Gradual change was more common. Abrupt strategy change was more common in children who…

Reports on a study in which children aged 7 to 9 years and 11 to 13 years were asked to judge which one out of three wooden blocks would float, given weight and volume information for each block relative to a block that was known to float. Indicates that judgments may have been based on the size-weight illusion. (HOD)