In two experiments (N=210) conservers, transitional conservers, and nonconservers were directed to lie or pretend to other children that their judgments and explanations of a series of conservation problems were the opposite of what they really were. Nonconservers and transitional subjects in both studies made large and significant gains in…

Advocates an ideology stressing survival of the planet. Discusses major changes in the concept of war since the advent of nuclear warfare. Considers three stages for the development of peace: negative peace, nonviolence or conflict resolution, and positive peace. Reviews research on young children's capacity for understanding peace concepts. (AC)

This study examines the effectiveness exercises based on the cognitive conflict, existing within the child, between two representational systems related to temperature: the qualitative-verbal one and the quantitative-numerical one as these relate to the advancement of children's understanding of the concept of temperature. (Author/DS)

The relation between conceptual development and visual exploratory behavior was investigated by engaging eighty-four 3-, 4-, and 8-year-old children in a picture-sorting task to determine whether they would spontaneously and readily discriminate between animate and inanimate objects. (Author/JMB)