Verbal Memory Deficits in Children with Less than 750 g Birth Weight

Numerous studies have documented memory deficits in very low birthweight (VLBW, < 1500 g) children, yet we know little about the nature of these memory problems. To clarify memory sequelae and examine memory deficits in relation to the degree of low birth weight, we administered the California Verbal Learning Test–Children’s Version (CVLT-C) to a regional sample of 57 < 750 g birthweight children and to groups of 53 750–1499 g birthweight children and 49 term-born controls. Group comparisons revealed significant differences between the < 750 g birthweight group and term-born children on measures of list learning, delayed recall, and inaccurate recall. In addition, the percentage improvement in correct recognitions relative to long-term delayed recall was greater in the < 750 g group than in the term-born controls. Similar differences were observed between VLBW children with and without abnormal neonatal cerebral ultrasounds (high- and low-risk groups). Differences in learning rate between the VLBW and term-born groups, and between high- and low-risk VLBW children, were evident even when vocabulary skill was covaried or when children with neurosensory deficits or IQ < 80 were excluded from analysis. The findings document deficits in verbal memory in the subset of VLBW children at greatest biological risk, and suggest that acquisition processes are selectively impaired.     

Giant African Pouched Rats as Detectors of Tuberculosis in Human Sputum: Comparison of Two Techniques for Sputum Presentation

Previous studies have shown that pouched rats can detect the presence of Mycobacterium tuberculosis, which causes tuberculosis, in human sputum samples obtained from clinical facilities. Although pouched rats evaluate sputum samples quickly, preparing the samples is relatively slow. The present study evaluated whether the rats can detect tuberculosis in microscope slides, which are routinely prepared at these facilities. Results indicate that they can do so, but their accuracy is considerably lower than that of rats exposed to pots containing sputum, as in prior studies.

     

Socio-economic health inequalities: Their origins and implications

Abstract

Evidence attests to substantial variations in health contingent on socioeconomic position. It is argued that these effects cannot be dismissed as artefact nor can they be explained, in the main, by either social selection or an unequal distribution of accepted behavioural risk factors among different social groups. The most likely explanation would seem to be social causation. However, it is continuing social and material inequality that appears most implicated; accounts which locate the effects in childhood social and material causes are far less compelling. The persistence of socioeconomic health differentials into the materially better-off social strata and the possible determining role of relative as well as absolute living standards suggest that psychological, in addition to material, variables are likely to be involved. Isolating the key psychological variables and identifying the nature of their influences will not be easy tasks, although social relations, psychological stress, uplifts, and control have emerged as possible candidates. However, psychological mediators of this sort most probably constitute surface rather than basic causes. Socio-economic inequality, it is contended, remains the basic cause, and, as such, the proper target for intervention. Psychological interventions are unlikely to yield much in the way of dividends in this context and indeed could inadvertently contribute to victim blaming.     

Recognition of Affective Speech Prosody and Facial Affect in Deaf Children with Unilateral Right Cochlear Implants

Cochlear implant (CI) devices provide the opportunity for children who are deaf to perceive sound by electrical stimulation of the auditory nerve, with the goal of optimizing oral communication. One part of oral communication concerns meaning, while another part concerns emotion: affective speech prosody, in the auditory domain, and facial affect, in the visual domain. It is not known whether childhood CI users can identify emotion in speech and faces, so we investigated speech prosody and facial affect in children who had been deaf from infancy and experienced CI users. METHOD: Study participants were 18 CI users (ages 7–13 years) who received right unilateral CIs and 18 age- and gender-matched controls. Emotion recognition in speech prosody and faces was measured by the Diagnostic Analysis of Nonverbal Accuracy. RESULTS: Compared to controls, children with right CIs could identify facial affect but not affective speech prosody. Age at test and time since CI activation were uncorrelated with overall outcome measures. CONCLUSION: Children with right CIs recognize emotion in faces but have limited perception of affective speech prosody.     

Artifacts as Conventional Objects

What underlies children's understanding of artifacts? Studies suggest that beginning around age 7, people reason about artifacts in terms of the inventor's purpose—termed the design stance. Our two studies emphasize another component of artifact understanding—the cultural nature of artifacts—by demonstrating people's sensitivity to an artifact's conventional use. In past studies participants were shown a novel artifact and told that someone invented it for a certain purpose and that later another person used it for a different purpose. Here we demonstrate that if participants are told that many people, as opposed to just one person, use an artifact differently, 5-year-olds, 7-year-olds, and adults do not strictly judge the artifact in terms of its invented purpose. We conclude that people's conceptions of artifacts are more complex and dynamic than has been suggested.     

Disgust sensitivity and fear of animals: Effect of exposure to violent or revulsive material

Subjects were asked to rate their fear of four categories of animals both before and after viewing one of three brief video films. Subjects watched either (a) a video depicting extreme violence, (b) a video depicting revulsive scenes from a hospital operation, or (c) a video showing neutral landscape scenes. The results suggested that exposure to violent material produced an increase in fear ratings for animals in the Hi Fear/Hi Predatory category (e.g., lion, tiger, shark) which was significantly different from a decrease in fear ratings recorded for all other categories of animals. However, exposure to revulsive material produced an increase in fear ratings to animals in both the Hi Fear/Lo Predatory category (e.g., rat, spider, snake) and the Hi Revulsion category (e.g., slug, maggot, snail) which was significantly different to the decrease in fear ratings recorded for animals in the remaining categories. The neutral landscape scenes produced a decrease in mean fear ratings for all categories of animals. These results are considered further support for a disease-avoidance model of common animal fears, and suggest a causal link between disgust sensitivity and fear of certain fear-relevant animals.     

Characteristics of individuals with fear of spiders

Abstract

This paper reports the results of two studies which investigated some of the factors that differentiated individuals with fear of spiders from those without such fears. The main results suggested that (a) there was little evidence that fear of spiders in nonclinical subjects is normally acquired through direct conditioning experiences; (b) there was some evidence for a familial component to spider fears; (c) there was no support for the view that individuals reporting a fear of spiders were especially sensitized to the movement cues possessed by spiders; (d) fear of spiders was not associated either with higher levels of trait anxiety or with an increased predisposition to other fears in general; but (e) fear of spiders did appear to be associated with increased fear of other animals, but only animals that are normally considered fear-evoking or disgust-evoking. These results provide little support for a traditional conditioning view of spider fears, and they are not entirely consistent with some preparedness accounts of the acquisition of specific fears. However, the results do suggest that fear of spiders is part of a functionally integrated set of animal fears, and it is argued that the present results could be better understood by attempting to integrate predator-defence and disease-avoidance models of animal fears.     

Quest Religion and the Problem of Limited Compassion

Is the religious questing orientation an unprejudiced orientation that shows tolerance for people to a degree that suggests universal, rather than circumscribed, compassion? To answer this question, 90 undergraduates were given the opportunity to help either of two peers win a monetary prize. The identity of one of the peers was manipulated across two conditions: he or she was presented as holding a religious fundamentalist belief style or belief style unspecified. The purpose of the monetary prize was also varied across two conditions: an activity that either would or would not promote religious fundamentalist behavior. Participants scoring high in religious questing helped the discloser who held a religious fundamentalist belief style less than the discloser who did not, irrespective of whether they promoted religious fundamentalist behavior or not. These results suggest that the questing orientation is associated with prejudice toward the value‐violating person when the salient person value violates the open‐minded belief style of the questing orientation.     

Sources of variability in sequelae of very low birth weight.

Few investigations have examined the specificity of sequelae of very low birth weight (VLBW, <1500 g) or sources of variability in outcome. To better understand the nature and determinants of outcome, we assessed neuropsychological and achievement skills at mean age 11 years in 62 children with <750 g birth weight, 54 with 750-1499 g birth weight, and 66 term-born controls. Distinct cognitive constructs were identified by factor analysis, and the three birthweight groups were compared on these constructs and on composite measures of achievement. Although the group with <750 g birth weight performed less well on all tests than term-born controls, group differences in a perceptual planning factor and in mathematics remained even when IQ was controlled, and deficits were more pronounced in mathematics than in reading. Results from structural equation modeling were consistent with the hypothesis that neuropsychological skills mediated the relationship between birth weight and achievement. The findings confirm the differential deficit hypothesis, support the need to consider multiple sources of variability in VLBW outcomes, and highlight the importance of neuropsychological constructs in developing an explanatory framework.