The purpose of this study was twofold: (1) to understand the conceptual frameworks that sixth-grade students use to explain the nature and structure of matter and molecules; and (2) to assess the effectiveness of two alternate instructional units in helping students change those conceptions. The study involved 15 sixth-grade classes taught by 12…

This paper presents the results of an experiment which investigated elementary school children's concept of the earth's shape and the related concept of gravity. First, third, and fifth grade children were asked a series of factual, explanatory, and generative questions in an attempt to understand as clearly as possible the way they conceptualized…

A study examined the application and availability of clinical and biomedical knowledge in the clinical reasoning of physicians as well as possible mechanisms responsible for changes in the organization of clinical and biomedical knowledge in the development from novice to expert. Subjects were 28 students (10 second year, 8 fourth year, and 10…

The paper presents the thesis that experienced physicians, while diagnosing routine cases, are operating upon knowledge structures that are distinctively different from those of novice physicians and students. In the course of their medical training, students develop rich, elaborated causal networks, explaining the causes and consequences of…

Research on intelligent tutoring seeks to develop systems for automating education and to explore epistemological issues concerning the nature of the knowledge presented by tutors and how that knowledge can be learned. The ACT theory of skill acquisition and its successor (PUPS--PenUltimate Production System) provides production-system models of…

The categories and applications of strategic knowledge as these relate to problem solving in the area of transmission genetics are examined in this research study. The role of computer simulations in helping students acquire the strategic knowledge necessary to solve realistic transmission genetics problems was emphasized. The Genetics…

A cognitive-structural model for counselor supervision, derived from advances in cognitive psychology, is proposed for facilitating trainee conceptual development and self-efficacy. Within the model, there are recommendations for matching structure in the supervisory relationship to the conceptual complexity and self-efficacy levels of the…

Cognitive structuring was implemented by showing 30 subjects a 10-minute videotape that presented Holland's (1985) model of the world of work before they used an interactive computer-assisted guidance system (DISCOVER). The effect of prior structuring was assessed in terms of a subject's representation of the world of work, occupational certainty,…

This study compared the effects of an elaborated unit of instruction and a hierarchical unit on students' online processing activities, efficiency of encoding new information, and facility in solving problems. Participants were six education graduate students rated as novices on the to-be-learned content--a unit on the principles of photography.…

The thoughts that teachers have about the content and students they are to teach influences the way in which they will teach. The purpose of this paper was the development of an instrument to identify teachers' conceptions of teaching science and to review literature concerning this topic. The instrument described was designed to be sensitive to…

In this study, the attitudes of Israeli children aged 6 to 15 years were surveyed regarding their conceptions of plants as living things. It was desired to find out whether children consider plants to be alive, the knowledge differences between the different age groups in the study, how children classify plants according to biological criteria and…

An understanding of fraction addition can be thought to involve two quantitative ideas: (1) the understanding that adding to an original quantity increases its size, and (2) a sense of how much increase occurs. Both of these ideas should underlie or inform a child's approach to problems involving fraction addition and thereby constrain the class…

This paper explores the readiness of student affairs professionals to utilize adult development knowledge in everyday interactions with college students. Four types of knowledge about the adult development process (cognitive-developmental, psychosocial, person-environment interaction, and humanistic-existential) are briefly defined, with…

The purpose of this study was to examine the thinking underlying the questions posed by a science teacher to her seventh grade students in an instructional activity called Mind Games, in which hypothetical situations focussed on scientific issues are proposed and explored at least once during each major instructional unit. Mind games are conveyed…

This paper discusses the relationship between the mediation of task performance by some structure that is not inherent in the task domain itself and the phenomenon of automatization, in which skilled performance becomes effortless or phenomenologically "automatic" after extensive practice. The use of a common simple explicit mediating…