Proposes a variant of mental model theory which suggests that the development of conditional reasoning (if--then) can be explained by such factors as the capacity of working memory, range of knowledge available to a reasoner, and his/her ability to access this knowledge "on-line." Finds much empirical data explained by this model.…

Cognitive development as it progresses from concrete to abstract thinking is discussed as it relates to adolescent youth and the early secondary curriculum. Piagetian tests administered to a group of freshman and sophomore high school students revealed that many had difficulty with those scholastic activities requiring formal reasoning. Three…

This study explored the moral reasoning and scientific argumentation skills of 31 gifted Finnish adolescents participating in a science program at the University of Helsinki. Students were given the Defining Issues Test (DIT) to determine their level of moral reasoning and the Raven test to evaluate their scientific reasoning. The argumentation…