Defines and describes the processes by which students acquire new knowledge: accretion, tuning, and restructuring. Relates these processes to knowledge models presented in earlier columns. Discusses extension activities. (RS)

Considers event phenomena and how such phenomena might be understood in terms of process knowledge models. Presents the step and stage process knowledge model, the classification process knowledge model, and the conditional process knowledge model. (SR)

Most research on differential item functioning (DIF) focuses on methods for detection rather than on understanding why DIF might occur. This study was designed to investigate whether two alternative approaches to parsing items based on structural characteristics related to particular cognitive strategies could be used to help explain gender DIF.…

In this study a distinction is made between routine, semiroutine, and nonroutine problems based on the problem solver's knowledge. Routine problems are solved by applying a known procedure, semiroutine problems require planning that uses functional knowledge, and nonroutine problems require generation of new functional knowledge. Nonroutine…

One of the major trends occurring in the area of task analysis methodology is the development of better methods to analyze cognitive tasks, including new methodologies for analyzing the ways in which knowledge should be structured within a student's head to facilitate given types of performance. The most important trend is the integration of task…

Cognitive performance can be improved through the explicit instruction of strategies that produce good performance. Variations in the ability to access knowledge relevant to specific materials that might affect strategy use, students' perceptions of strategies, and strategy maintenance are considered. (TJH)

This study explored whether 142 teachers from different academic disciplines possessed different theories of knowledge and different attitudes toward education, and whether those attitudes affected classroom practice. Findings indicated that, on three of four scales used in the study, teachers differed as a function of academic discipline.…

Suggests that Kuhn's study reported in this issue (PS 524 345) offers insight into how people make casual inferences, and raises important questions about these processes. (JW)

Responds that questions of study by Kuhn and others (PS 524 345) in this issue were motivated by concerns about the role of scientific thinking in general thinking, not in development of scientific reasoning. Study was meant to increase understanding of role of strategies in development, not provide definitive explanation of how strategies fit…

Discusses helping students understand cases and classes through knowledge modeling. Discusses classification and human cognition, and classification and pictorial knowledge models. Provides classroom extension activities. (SR)

Illustrates "hard" and "soft" theoretical constraints of cognitive structures and examines ways in which the learning mechanism feature of the Soar architecture places hard constraints on all models that use the feature. The relationship between architecture and model in terms of the degree to which a model is compliant with constraints set by the…

Back-of-the-envelope problems call for approximate calculations of quantities that can be related to information in a person's knowledge but are not solved precisely. These problems provide an opportunity for the study of processes and the role of general knowledge in ill-defined problem solving. Subjects with advanced and intermediate knowledge…

Explores the extent to which student questions are indicative of understanding as well as strategies for encouraging questioning. Student questions are categorized as consolidation questions, exploratory questions, and elaboration questions. (DDR)

Explores the relevance of hierarchies to information processing. Suggests that participants in all conditions create hierarchical representations as they work, and those in nonlinear conditions use this structure to guide their exploration of the material. An important function of hierarchies may be to define relationships between concepts.…

The relation of knowledge for solving problems to understanding of general principles in a subject-matter domain is discussed. Theoretical representations, called "conceptual competence," are presented to represent principles that are believed to be understood implicitly by individuals. Implications for problem-solving procedures can be…