The Logic of Plausible Reasoning: A Core Theory

The paper presents a core theory of human plausible reasoning based on analysis of people's answers to everyday questions about the world. The theory consists of three parts:

• 1 a formal representation of plausible inference patterns; such as deductions, inductions, and analogies, that are frequently employed in answering everyday questions;
• 2 a set of parameters, such as conditional likelihood, typicality, and similarity, that affect the certainty of people's answers to such questions; and
• 3 a system relating the different plausible inference patterns and the different certainty parameters.

This is one of the first attempts to construct a formal theory that addresses both the semantic and parametric aspects of the kind of everyday reasoning that pervades. all of human discourse.     

A framework for assessing program institutionalization

This article presents a framework for assessing the institutionalization of programmatic innovations in nonprofit community agencies and in schools. Institutionalization is the attainment of long-term viability and integration of innovations in organizations. Institutionalization is often characterized as the final stage in an innovation diffusion process. The framework was derived from a qualitative study of ten health promotion programs that were innovations in their host organizations. The framework is a two dimensional matrix: one dimension consists of organizational subsystems; the other consists of levels of institutionalization termed passages, routines, and niche saturation. The cells of the matrix are the basis for assessing program institutionalization. Robert M. Goodman is a research assistant professor in the Department of Health Behavior and Health Education at the University of North Carolina's School of Public Health. Currently, Dr. Goodman directs a four-year intervention study on the dissemination of tobacco prevention curricular funded by the National Cancer Institute. Allan Steckler is an associate professor in the Department of Health Behavior and Health Education at the University of North Carolina's School of Public Health. Dr. Steckler is also the principal investigator of the National Cancer Institute tobacco prevention study.     

Effects of self-correction on the spelling performance of junior high students with learning disabilities

The purpose of this study was to compare the effects of Self-Correction and Traditional spelling on the acquisition, maintenance, and generalization of spelling words with five junior high school students with learning disabilities. During Traditional spelling students received a weekly list of 20 unknown words. Daily 20-minute assignments with these words varied among writing them, arranging them in alphabetical order, dividing the words into syllables, and using a dictionary to locate word meaning. Students were tested on the 20 words at the end of the week. During Self-Correction, students received 20 words on a 5-column sheet of paper. Columns were arranged so that stimulus words could be hidden by folding the paper back, and later exposed after the teacher dictated and the student wrote the words. Students used proofreading marks to self-correct. Sessions lasted 20 minutes, and weekly, delayed, and generalized assessments were conducted. Results indicated that for all five students the Self-Correction procedure was more effective for word acquisition than Traditional spelling. Also, for four of the five students, maintenance of words was higher under Self-Correction. Generalization occurred for three students. Finally, measures of social validity indicated that the students preferred Self-Correction over Traditional spelling, although two teachers in regular classrooms did not notice significant changes in the overall spelling performance for the students. Implications for the classroom practitioner are discussed.     

Task Specificity in the Use of Words in Mathematics: Evidence from Bilingual Problem Solvers

Mathematics is often said to be a different language in itself. Three experiments were conducted to show some evidence for this common notion. It was hypothesized that in math word problem solving, people interpret words like “more” and “less” in specialized ways that are specific to the task of math word problem solving. Subjects were given texts with quantitative information, but the texts were framed either as math problems or as stories, and were written either in English or Filipino. Subjects were then asked to verify statements that describe quantitative relations given in the text; these relations either stated an exact or an inexact quantitative difference. The verification responses and verification times in three experiments show that subjects more often accepted the inexact difference as true when the text was framed as a story compared to when framed as a problem. These results support the hypothesis that the use of the specialized meaning is specific to the task of solving word problems in math. The data were equivocal about the role of the language used in the operation of this knowledge. The results were discussed in terms of the implications of specificity of knowledge, context sensitivity, and the possible role of language use in the process of learning and developing mathematical knowledge.     

Effects of tobacco smoking, schizotypy and number of pre-exposures on latent inhibition in healthy subjects

Latent inhibition is a slowing of learning about a stimulus that when previously experienced had no consequences. This study investigated the effects of tobacco smoking and personality traits on a latent inhibition task. Two-hundred and five healthy adults performed an auditory masking task during which half of them were pre-exposed to bursts of white noise. All subjects were then asked to detect an association of the white noise with a change on a computer screen. Subjects who had heard the white noises before were slower to learn the association than subjects who had not, i.e. they showed latent inhibition. Latent inhibition was stronger when subjects were pre-exposed to 10 rather than 6 bursts of white noise. Latent inhibition was reduced in subjects who smoked tobacco and in non-smoking subjects who scored highly on a schizotypy questionnaire. These two effects were independent. We conclude that tobacco smoking should be taken into account in interpreting the results of human latent inhibition studies.     

Five minutes after death: A study of beliefs and expectations

This paper examines the beliefs and expectations that a sample of 508 people hold about the first five minutes after death. A substantial minority believed that they will experience the main elements of the neardeath experience (NDE). In general these elements were cited more frequently than were Biblical images. Six percent of the sample said that postmortem survival for them will be a negative and disturbing experience. We discuss these results in terms of their methodological implications for other survey work and their theoretical contribution toward our understanding of negative NDEs.