Shows a wide variety of task performance ability. Supports the hypothesis that the tasks require the use of the same or a unified set of cognitive processes. (RL)

Tested hypothesis that understanding validity of inference is a relatively late development by asking fourth and seventh graders and college students to sort sets of deductive arguments. None of fourth graders, 45 percent of seventh graders, and 85 percent of college students used validity as basis for distinguishing arguments. Experiments…

A philosophy reader for seventh and eighth graders, "Lisa" presents a story about daily experiences of a group of schoolchildren. The story is a sequel to ED 103 298. "Lisa" focuses on ethical and social issues such as lying and truth-telling, fairness, naturalness, and what are rules and standards. Other issues such as job and sex discrimination,…

This document contains the second volume of the proceedings of the 29th Conference of the International Group for the Psychology of Mathematics Education. Conference papers are centered around the theme of "Learners and Learning Environments." This volume features 43 research reports by presenters with last names beginning between Adl…