Modeling Family Dynamics in Children with Fragile X Syndrome

Few studies have examined the impact of children with genetic disorders and their unaffected siblings on family functioning. In this study, the reciprocal causal links between problem behaviors and maternal distress were investigated in 150 families containing a child with fragile X syndrome (FXS) and an unaffected sibling. Both children's behavior problems appeared to have strong, direct effects on maternal distress, but maternal distress did not appear to have any reciprocal causal effects on either child's behavior problems. Surprisingly, there were no significant differences in the effects of the two children's behavior problems on maternal distress. These data suggest that the problem behaviors of children with FXS, as well as their unaffected siblings, can have a substantial and additive impact on maternal depression and anxiety. Future research efforts should employ longitudinal research designs to confirm these findings.     

An Hawaiian Near-Death Experience

This paper is a case report of an Hawaiian near-death experience (NDE) from the early 1900s, which was uncovered in a turn-of-the-century monograph of Hawaiian folk tales (Thrum, 1907). The account differs from others in the same volume because it appears to be a real-life account rather than a folk tale. I describe similarities and differences from other Pacific area accounts, with particular attention to the only other Polynesian NDE account in the literature, a Maori NDE reported by Michael King in 1985.     

The development of a scale to measure cognitive distortions in bulimia

The Bulimia Cognitive Distortions Scale (BCDS) was developed to measure irrational beliefs and cognitive distortions associated with bulimia. The final 25-item scale was found to have excellent internal consistency with high item to total correlations and a coefficient alpha of .97. Factor analysis revealed two clear factors measuring cognitive distortions related to automatic eating behaviors and to physical appearance. Data attesting to the convergent and divergent validity of the BCDS are also presented. With 110 subjects (55 bulimics, 55 controls), a discriminant analysis revealed the BCDS to be the only significant variable in predicting group membership, correctly classifying 93.6% of all subjects. The BCDS was also predictive of severity of bulimia as measured by the frequency of binge eating episodes. The potential of the BCDS as both a diagnostic and research instrument is discussed.     

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.     

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.