This paper describes NEOMYCIN, a computer program that models one physician's diagnostic reasoning within a limited area of medicine. NEOMYCIN's knowledge base and reasoning procedure constitute a model of how human knowledge is organized and how it is used in diagnosis. The hypothesis is tested that such a procedure can be used to simulate both…

The concept of multiplication is described and illustrated using several different representational systems. A conceptual approach to teaching mathematics is compared with the procedural approach commonly found in the school curriculum. Four different methods of representing the multiplication process with numbers larger than ten are presented:…

Language processing is the abstraction of meaning from a physical signal, such as a sequence of speech sounds. Processing a spoken message requires a series of transformations that begin with the acoustic signal arriving at the ears and end with meaning in the mind of the listener. The goal of this information-processing model is to describe how…

It is suggested that a reader's idea structure will affect processing of incoming information. Two aspects of the idea structure are further developed--the truth value aspect and the analytic level aspect. The idea structure can be characterized by ideas consisting of propositions which are considered to be more or less true or false (beliefs), or…

Hierarchically organized knowledge about actions has been postulated to explain planning in problem solving. Perdix, a simulation of problem solving in geometry with schematic planning knowledge, is described. Perdix' planning knowledge enables it to augment the problem space it is given by constructing auxiliary lines. The planning system also…

The experiments described in this paper compare inference-based and expectancy-based models of the comprehension of indirect, non-literal expressions. The inference-based model claims that the comprehension of non-literal meanings requires more and deeper processing than the comprehension of literal meanings. The expectancy-based model rests on…

Research on role-model identification has demonstrated the powerful effect that models have on individuals' behavior. To extend prior research on this phenomenon, the role-model identifications of first-, third-, fifth-, and ninth-grade students were outlined and examined. The results did not support the hypothesis that adolescents identify with…

THIS PAPER DISCUSSES THE THEORY THAT CONTENT ANALYSIS OF MESSAGES IS A CONTRAL TOPIC IN ALL SCIENCES DEALING WITH MAN. CONTENT ANALYSIS IS THE DETERMINATION OF CHARACTERISTICS OF A SOURCE FROM THE NATURAL LANGUAGE UTTERANCES IT EMITS. ASSIGNING PROPERTIES TO WORDS AND THEN COUNTING THE APPEARANCES OF THE PROPERTIES IS INSUFFICIENT--THE CONTENT OF…

A developmental model of literacy based on language and cognitive skills is presented in this paper. Two independent learning strands suggested as major factors in achieving literacy are learning to understand language by eye (reading) as skillfully as one can understand language by ear (auding) and learning to use the printed medium for literacy…

The text of an invited address on artificial intelligence (AI) research over the 1963-1968 period is presented. A survey of recent studies on the computer simulation of intellective processes emphasizes developments in heuristic programing, problem-solving and closely related learning models. Progress and problems in these areas are indicated by…

This paper presents a study using a neo-Piagetian theory to analyze the micro-structure underlying Piaget's "control of variables" scheme. Data are presented which support the conclusion that young children are capable of acquiring and utilizing this scheme before they acquire Conservation of Weight, that is, providing (1) that the…

This paper reviews two major advances in preschool evaluation strategy that developed as a result of trying to evaluate Head Start, and proposes another evaluation approach. The first advance in evaluation procedure was to conceive educational objectives in terms of processes rather than products; that is, there was a shift from achievement tests…

The problem posed by this study was to determine a method of presenting information that would maximize learning, by taking into account the learner's conceptual tempo, one aspect of his cognitive style. Specifically, this study investigated the possible interaction effects of the learner's impulsive-reflective disposition with the rehearsal part…

The emphasis in this study is on the development of a diagnostic measurement model for instruction. The content used was junior high science, but the content and subjects were used primarily as a means to an end. The model represents an attempt to incorporate Gagne's learning taxonomy into Tyler's model of the educational act. Focus is on the…

This research paper proposes several mathematical models which help clarify Piaget's theory of cognition on the concrete and formal operational stages. Some modified lattice models were used for the concrete stage and a combined Boolean Algebra and group theory model was used for the formal stage. The researcher used experiments cited in the…