Thought experiments and conceptual revision

The idea that claims about the physical world might be arrived through a priori reasoning has a long history in physics. But it is clear that empiricist notions of the nature of science, and in particular the empirical nature of physics, have held sway in this century. Yet, in the idea of thought experiments in science, we might find the survival of earlier a priori reasoning to the truth of claims about the physical world. This paper challenges the notion that science can be understood as a purely empirical endeavor and points out what reforms would be necessary for teaching the image of science to our young.     

THE EFFECTS OF MODELLING ON THE CONTINGENT PRAISE OF MENTAL RETARDATION COUNSELLORS

A multiple-baseline design was used to evaluate the effects of a simple modelling procedure on the contingent praise of five counsellors while they conducted hygiene-training sessions in toothbrushing and hand-and-face washing with severely retarded children. After varying numbers of baseline sessions, each counsellor watched a model who conducted a series of toothbrushing sessions, in which he conspicuously praised correct toothbrushing responses and approximations to correct responses. No modelling occurred during hand-and-face washing sessions. As a result of several exposures to the model's performance, levels of response-contingent praise provided by four of the five counsellors during toothbrushing sessions increased sharply over baseline. The levels of counsellor praise showed parallel increases during hand-and-face washing sessions. A two-week followup showed that the levels of praise obtained through modelling were maintained in the model's absence.     

A behavioral technology for producing concept formation in university students

Three experiments analyzed the effectiveness of a textbook incorporating "concept programming" in producing concept formation in university students. The concept programming portion of each lesson requires students to determine which concept is illustrated by each of 20 short fictional stories about everyday behavioral situations. The stories are selected to illustrate and contrast the concepts of that lesson. Student responses are heavily prompted during the initial stories of each lesson. The first experiment demonstrated that students generalize to entirely novel examples from the examples in the textbook. The second experiment demonstrated that the concept programming portion of the textbook is a critical component in producing generalization. The third experiment demonstrated that the amount of concept formation produced by the concept programmed textbook is greater than that produced by a widely used standard textbook.     

IN VIVO LANGUAGE INTERVENTION: UNANTICIPATED GENERAL EFFECTS

After observing the lack of generalization of language trained in highly structured training sessions using established behavior modification techniques, “incidental teaching” procedures were developed to change the use of specified language behaviors in the natural environment. This paper reports an analysis of the general changes in the language, other than that specifically targeted by the incidental teaching procedures, used by disadvantaged preschool children. The daily language samples of disadvantaged children involved in a previously reported experiment to increase compound sentence usage were reexamined and compared to comparable records of other disadvantaged children and of middle-class children of college parents in order to assess possible general effects of the intervention program. Whereas the language that both groups of comparison children used changed little across the preschool year, the amount of talking by the children in the experimental program increased markedly. Their use of more elaborate vocabulary and more elaborate sentences also increased in direct proportion to the increases in overall language use, such that both language use and language elaboration in the experimental group of children changed from a pattern similar to the comparison group of disadvantaged children to a pattern similar to the comparison group of middle-class children. It is argued that some general features of the incidental teaching procedure—differentially attending to child overtures and responding relative to the child's selected topic (reinforcer)—contributed to the increase in overall language use beyond the specific language behavior targeted, and that this increase in the probability of children's talking itself resulted in the substantial increases in elaboration seen in the children's spontaneous language. Because, at least in children with fairly well-developed language repertoires, language use is contextually controlled, talking more involves talking in more varied and complex contexts, which inevitably produces the use of more elaborate language.     

ACQUISITION OF SIGN LANGUAGE BY AUTISTIC CHILDREN II: SPONTANEITY AND GENERALIZATION EFFECTS

Autistic children typically do not use their language repertoire in order to communicate. Six autistic children who exhibited poor communication skills were trained to use their sign repertoire to make spontaneous requests of adults. Training consisted of imitative prompting, fading, and differential reinforcement, and included aspects of incidental teaching. The children displayed an increase in the rate and variety of spontaneous sign requests (Experiment 1). Generalization of spontaneity across adults (Experiments 1 and 2) and settings (Experiment 2) was also observed. We suggest that spontaneity may be facilitated when language is brought under the control of broadly defined stimuli such as adult attention rather than narrowly defined stimuli such as the presence of specific objects or verbal prompting in the form of questions. Finally, response generalization was observed as well (Experiment 1). Specifically, as spontaneity increased, self-stimulatory behavior decreased. This result may be accounted for in terms of reinforcer competition, reinforcer consistency, or discriminative stimulus effects.     

Quality assurance in the clinical genetics setting—Report of a workshop

Participants in a panel discussion sponsored by thead hoc Quality Assurance Committee of the National Society of Genetic Counselors discuss early efforts to develop and implement quality assurance instruments at institutional, state, and regional levels. Uniform guidelines and self-assessment tools can help genetic counselors and clinical geneticists to provide the best possible care to individuals affected by genetic diseases. Further work will be needed to address aspects not covered here and to assure that guidelines allow for creative variation among professionals and centers. An interdisciplinary approach to such standard-setting is recommended.CGC     

A methodology for teaching ethics in the clinical setting: A clinical handbook for medical ethics

The pluralism of methodologies and severe time constraints pose important challenges to pedagogy in clinical ethics. We designed a step-by-step student handbook to operate within such constraints and to respect the methodological pluralism of bioethics and clinical ethics. The handbook comprises six steps: Step 1: What are the facts of the case?; Step 2: What are your obligations to your patient?; Step 3: What are your obligations to third parties to your relationship with the patient?; Step 4: Do your obligations converge or conflict?; Step 5: What is the strongest objection that could be made to the identification of convergence in step 4 or the arguments in step 4? How can this objection be effectively countered?; and Step 6: How could the ethical conflict, or perceived ethical conflict, have been prevented?     

Teaching and teachers' “didaktik”

In this article I outline some principal features of phenomenography as a foundation of research on teachers' teaching competence. This article discusses the relations between autoteaching and teachers' teaching, between teachers' teaching and the notion of phenomenographic conceptions, and between phenomenography and philosophy.The discussion aims toward a preliminary articulation of the concepts of the domain and to outlines of a general theory of educational research on teaching. The focus is primarily on teachers' didaktik (teachers' teaching competence) as a concrete content-related field expressed as qualitative and complex ideas and their meanings.The concepts illustrating the content of teachers' didaktik are treated in eight categories: pedagogic planning, didaktik intentionality, differentiation of methods, stepping out of the natural attitude, didaktik oneness, didaktik themes and didaktik patience, the invisible dimension of didaktik.     

Assisted death and martyrdom.

Against the backdrop of ancient, mediaeval and modern Catholic teaching prohibiting killing (the rule against killing), the question of assisted suicide and euthanasia is examined. In the past the Church has modified its initial repugnance for killing by developing specific guidelines for permitting killing under strict conditions. This took place with respect to capital punishment and a just war, for example. One wonders why in the least objectionable instance, when a person is already dying, suffering, and repeatedly requesting assistance in dying, there is still such widespread condemnation of assisted suicide and euthanasia. In a Gedankexperiment, I suggest that certain stories of martyrdom in the history of the Christian Church shed some light on the role of taking one's life, or putting one's life in danger out of love. I further suggest that requesting assisted suicide and/or euthanasia from the motive of love of one's family or care givers might possibly qualify as one instance of justifiable euthanasia, although I acknowledge that the Church will not be making changes in its stance any time soon.