It is often assumed that engaging in a one‐on‐one dialogue with a tutor is more effective than listening to a lecture or reading a text. Although earlier experiments have not always supported this hypothesis, this may be due in part to allowing the tutors to cover different content than the noninteractive instruction. In 7 experiments, we tested the interaction hypothesis under the constraint that (a) all students covered the same content during instruction, (b) the task domain was qualitative physics, (c) (...) the instruction was in natural language as opposed to mathematical or other formal languages, and (d) the instruction conformed with a widely observed pattern in human tutoring: Graesser, Person, and Magliano's 5‐step frame. In the experiments, we compared 2 kinds of human tutoring (spoken and computer mediated) with 2 kinds of natural‐language‐based computer tutoring (Why2‐Atlas and Why2‐AutoTutor) and 3 control conditions that involved studying texts. The results depended on whether the students' preparation matched the content of the instruction. When novices (students who had not taken college physics) studied content that was written for intermediates (students who had taken college physics), then tutorial dialogue was reliably more beneficial than less interactive instruction, with large effect sizes. When novices studied material written for novices or intermediates studied material written for intermediates, then tutorial dialogue was not reliably more effective than the text‐based control conditions. (shrink)

It is often assumed that engaging in a one‐on‐one dialogue with a tutor is more effective than listening to a lecture or reading a text. Although earlier experiments have not always supported this hypothesis, this may be due in part to allowing the tutors to cover different content than the noninteractive instruction. In 7 experiments, we tested the interaction hypothesis under the constraint that (a) all students covered the same content during instruction, (b) the task domain was qualitative physics, (c) (...) the instruction was in natural language as opposed to mathematical or other formal languages, and (d) the instruction conformed with a widely observed pattern in human tutoring: Graesser, Person, and Magliano's 5‐step frame. In the experiments, we compared 2 kinds of human tutoring (spoken and computer mediated) with 2 kinds of natural‐language‐based computer tutoring (Why2‐Atlas and Why2‐AutoTutor) and 3 control conditions that involved studying texts. The results depended on whether the students' preparation matched the content of the instruction. When novices (students who had not taken college physics) studied content that was written for intermediates (students who had taken college physics), then tutorial dialogue was reliably more beneficial than less interactive instruction, with large effect sizes. When novices studied material written for novices or intermediates studied material written for intermediates, then tutorial dialogue was not reliably more effective than the text‐based control conditions. (shrink)

This paper describes a generative theory of bugs. It claims that all bugs of a procedural skill can be derived by a highly constrained form of problem solving acting on incomplete procedures. These procedures are characterized by formal deletion operations that model incomplete learning and forgetting. The problem solver and the deletion operator have been constrained to make it impossible to derive “star‐bugs”—algorithms that are so absurd that expert diagnosticians agree that the alogorithm will never be observed as a bug. (...) Hence, the theory not only generates the observed bugs, it fails to generate star‐bugs.The theory has been tested on an extensive data base of bugs for multidigit subtraction that was collected with the aid of the diagnostic systems buggy and debuggy. In addition to predicting bug occurrence, by adoption of additional hypotheses, the theory also makes predictions about the frequency and stability of bugs, as well as the occurrence of certain latencies in processing time during testing. Arguments are given that the theory can be applied to domains other than subtraction and that it can be extended to provide a theory of procedural learning that accounts for bug acquisition. Lastly, particular care has been taken to make the theory principled so that it can not be tailored to fit any possible data. (shrink)

It is often assumed that engaging in a one‐on‐one dialogue with a tutor is more effective than listening to a lecture or reading a text. Although earlier experiments have not always supported this hypothesis, this may be due in part to allowing the tutors to cover different content than the noninteractive instruction. In 7 experiments, we tested the interaction hypothesis under the constraint that (a) all students covered the same content during instruction, (b) the task domain was qualitative physics, (c) (...) the instruction was in natural language as opposed to mathematical or other formal languages, and (d) the instruction conformed with a widely observed pattern in human tutoring: Graesser, Person, and Magliano's 5‐step frame. In the experiments, we compared 2 kinds of human tutoring (spoken and computer mediated) with 2 kinds of natural‐language‐based computer tutoring (Why2‐Atlas and Why2‐AutoTutor) and 3 control conditions that involved studying texts. The results depended on whether the students' preparation matched the content of the instruction. When novices (students who had not taken college physics) studied content that was written for intermediates (students who had taken college physics), then tutorial dialogue was reliably more beneficial than less interactive instruction, with large effect sizes. When novices studied material written for novices or intermediates studied material written for intermediates, then tutorial dialogue was not reliably more effective than the text‐based control conditions. (shrink)

Previously published: Princeton University Press, 1940.

According to models of objectification, viewing someone as a body induces de-mentalization, stripping away their psychological traits. Here evidence is presented for an alternative account, where a body focus does not diminish the attribution of all mental capacities but, instead, leads perceivers to infer a different kind of mind. Drawing on the distinction in mind perception between agency and experience, it is found that focusing on someone's body reduces perceptions of agency but increases perceptions of experience. These effects were found (...) when comparing targets represented by both revealing versus nonrevealing pictures or by simply directing attention toward physical characteristics. The effect of a body focus on mind perception also influenced moral intuitions, with those represented as a body seen to be less morally responsible but more sensitive to harm. These effects suggest that a body focus does not cause objectification per se but, instead, leads to a redistribution of perceived mind. (shrink)

This chapter contains sections titled: The Falsity Inherent in Sensory Ideas Descartes, Arnauld, and the Notion of Material Falsity Some Leading Interpretations A New Interpretation Conclusion.

'The Rational and the Moral Order' is a significant book providing a comprehensive theory of morality. The opening chapter is simply marvellous. Baier provides a cogent response to Hume's conundrums on practical reasoning: logical entailment, he argues, is not the correct model of the relation between reasons and that for which they are reasons. Indeed, the giving of reasons is, in part, a social enterprise, and there is no necessary connection between rationality and self-interest. Just as the giving of reasons (...) is a social enterprise taught to succeeding generations, so too is the moral enterprise, for a moral order is a social order of some sort. It is a social order that encourages a critical stance toward, and permits the correction of, its mores. Moral precepts can be sound or unsound, and yet can be relative to a moral order. In the concluding chapter Baier shows how his theoretical framework can be used to confront some of the moral problems people face, problems which have also exercised contemporary philosophers. Though there are many philosophers who believe that killing is worse than letting anyone die, there are few that defend the view other than by raw intuition. Baier deploys the resources of his theory of morality in support of this widely shared but poorly defended viewpoints. "Along the way, Baier deals with virtually all the problems that have taxed moral philosophers for a very long time -- rationality, responsibility, morality's relation to law, the good life, prisoner's dilemma, moral motivation, and others. The Rational and the Moral Order is careful, insightful, and convincing." --Theodore M. Benditt, University of Alabama. (shrink)

Beim Wort 'Aufklarung' denken wir zunachst und zumeist an Immanuel Kant und sein beruhmtes Diktum vom 'Ausgang des Menschen aus seiner selbstverschuldeten Unmundigkeit'. Doch die europaische Aufklarungsbewegung war vieldimensional und bewegte sich nicht nur in einer Richtung. Der bohmische Philosoph Bernard Bolzano (1781-1848) steht fur einen ganz anderen Pfad in der Geschichte der Aufklarung. Er war ein Philosoph der mitteleuropaischen Denkstromung, der eine Welt jenseits des Kapitalismus und der Ausbeutung des Planeten dachte. Er sah in der Aufklarung einen konkreten Auftrag (...) an jeden einzelnen Menschen, 'stets kluger, (moralisch) besser und damit glucklicher zu werden': Nicht die Welt zu beherrschen, sondern sie zu verstehen, das sei der Auftrag auf diesem Weg zum allgemeinen Gluck. Die Monographie stellt Leben und Werk dieses zu Unrecht vergessenen katholischen Denkers umfassend und quellengesattigt vor. (shrink)