When proportional information is pit against whole number numerical information, children often attend to the whole number information at the expense of proportional information (e.g., indicating 4/9 is greater than 3/5 because 4 > 3). In the current study, we presented younger (3- to 4-year-olds) and older (5- to 6-year-olds) children a task…

Discusses the impact of role playing on the change of moral judgment maturity in 96 college students. Subjects showed both immediate and delayed increases in moral judgment maturity when role playing a moral dilemma against an opponent who employed reasoning above the subject's initially assessed state. (LLK)

This study assessed the influence of age and ability on linear syllogistic reasoning in early adolescence by presenting bright and average 11- and 13-year-olds with 64, 3-term series problems. Results showed a dramatic effect on performance due to ability. Age effect was only marginally significant. (JMB)

Used a pretest/post-test control group design involving 44 female adolescent subjects to determine whether Moral Stage 3 subjects who have attained early basic formal operations are more susceptible to attempts to stimulate moral development than Stage 3 subjects who have attained only beginning formal operations and lack the cognitive…

Explores the hypothesis that there is a decline in operational thought ability in the elderly. Two samples of elderly males, with mean ages of 71.80 and 74.29 years respectively, were tested for their ability to conserve mass, surface areas and volume. (BD)

Three experiments tested 3- and 4-year-olds' use of abstract principles to classify and label objects by shape or function. Findings indicated that 4-year-olds readily adopted either rule when instructed to match objects by shape or function, but 3-year-olds followed only the shape rule. Without a rule, 4-year-olds tended to match by shape unless…

Examines the concepts employed by normal and retarded children matched for mental age in kindergarten through fourth grades. Two studies explored the schema by which these children organized their experience into meaningful patterns. (LLK)

Studied children's grasp of make-believe transformations they had seen enacted. Children indicated the pretend outcome by choosing a picture depicting no change or a picture depicting the pretend change. Older children chose correctly, even with the addition of a picture of an irrelevant transformation, but younger children did not. Autistic…

Two studies with first- and fifth-grade children in two learning tasks showed that preoperational children did not necessarily learn responses followed by a stimulus object previously instrumental in obtaining a reward, while postoperational subjects did. (Author/JMB)

Second and third graders and fifth and sixth graders were tested in a very large, unfamiliar environment to determine the relation of their knowledge of an abstract reference frame to performance on a spatial inference task. (HOD)

College students were assigned to either dyadic or individual problem-solving conditions and were given a series of formal operational tasks. Dyadic subjects solved more problems during the interaction phase than did individual subjects. Among dyadic subjects, interactions were associated with problem solving and pre-to-posttest gain scores. (BC)

This study investigated the emergence of combinatorial competence in early adolescence and the effectiveness of a programmed discovery training procedure. Significant increases in combinatorial skill with age were shown; it was found that the expression of this skill was significantly facilitated if problems involved concrete material of low…

Presentation of a "natural experiment" problem situation to fourth, sixth, and eighth graders and college students revealed that not until adolescence could subjects isolate alternative or additive causes in a multivariable situation. (JMB)

Investigates whether children's use of reasoning differs in child-child and adult-child discussions of moral dilemmas. Supports Piaget's contention that moral discussions with peers feature a more spontaneous use of reasoning than do discussions with adults. (HOD)