Previous studies have found that children have difficulty solving proportional reasoning problems involving discrete units until 10 to 12 years of age, but can solve parallel problems involving continuous quantities by 6 years of age. The present studies examine where children go wrong in processing proportions that involve discrete quantities. A…

This study assessed the ability of fourth, fifth, and sixth graders and college students to logically include and exclude variables when making inferences about a multivariate "natural experiment" situation. (Author/SB)

This study examined the effects of aid from mother and older sibling on the problem-solving behaviors of 120 first graders. Children with older sisters showed more advanced problem solving after aid, while those with older brothers did not. Interpretations in terms of family interaction patterns are offered. (JMB)

Three experiments examined elementary school children's ascriptions of blame for communication failure in a game in which either the child or the experimenter described one of a set of drawings so that the other could pick the matching one from an identical set. (Author/JMB)

First-, third-, fifth-, and sixth-grade children were administered 20 relational reasoning problems in which they had to deduce the possible sizes of one item relative to two others on the basis of a visual comparison and a written clue. Dramatic differences were observed between fifth- and sixth-grade children. Corrective feedback improved…

A matching task was presented to 120 subjects from 6 to 20 years of age to investigate the relative influence of dimensional salience and salience of variability on problem solving. The task included four dimensions: form, color, number, and position. (LLK)

Two studies involving five- and nine-year-old children examined the effects of planning with a partner as well as the relation of collaborative planning to subsequent solo planning. Results suggest that cognitive gains resulting from joint problem solving between children and adults or peers may be more likely with shared task responsibility. (RH)

A total of 10,785 fourth, fifth, and sixth graders in Hebrew-language elementary schools in Jerusalem were given a written test that assessed their understanding of transitive syllogisms. Analyses indicated that the effect of schooling on children's understanding of transitive inference was larger than the effect of age. (MDM)

In a study of children's use of encoding and strategy knowledge in domains in which problem-specific experience is lacking, children were tested for serial recall. Seven- and nine-year olds encoded contiguity relations, and encoding was related to strategy choices. Less consistent encoding of five-year olds did not influence strategy choices. (BC)

To determine if the modality in which children represent information in memory influences the process by which problems are solved, problem-solving strategy of deaf and hearing 10-year-old children was compared on a concept-discovery task. (JMB)

A developmental study of elementary school children's use of rule v computation in solving spacial perspective-taking problems. (CM)

Gifted-, normal-, and math-disabled children solved addition problems. Their problem-solving strategies and solution times were recorded. The gifted group showed the most mature distribution of strategy choices, and a verbal counting rate less than 50 percent of the rate of the other groups. (BC)

Three studies of elementary school children's problem-solving procedures in intentional discrimination tasks are reported. Subjects were children selected from kindergarten and grades 2, 3, and 6. (Author/MP)