The measurement of physical activity in young children

Two studies were conducted to determine the validity of various measures of physical activity in young children. In Study 1, 21 preschool children were utilized to explore how well measures of children's activity obtained from parents, teachers, and the children predicted observed behavior at school and in the home. Study 2 (n = 51 preschool children) focused on the predictive validity of the Caltrac motion sensor. In both studies, detailed minute-by-minute ratings of children's activity in Study 1 were generally ineffective in predicting observed physical activity. Children's activity preferences, however, were significantly related to the proportion of high intensity physical activity performed. In Study 2, there was a significant relationship (r = .86, p less than .0001) between Caltrac readings and observed physical activity. This correlation was similar for boys and girls, normal and overweight children, and younger and older children. These findings suggest that the Caltrac monitor may provide a valid index of individual differences in physical activity in young children.     

The Conversational Geography of Word-of-Mouth Communication and Marketing Practices

This study was a test of the utility of a diary-based methodology for revealing how word-of-mouth (WOM) marketing agents perceive their campaign and non-campaign-related WOM communication episodes. A modified version of the Iowa Communication Record, originally designed for presenting the “geography of everyday conversation,” was the base for the collection of 2,088 self-reports of the agents' WOM episodes. Data were subjected to a principal components factor analysis. The resulting factors—communication quality, value, impact, relational change, and conversational control—served to gauge differences attributable to the institutional nature of the WOM, sex of respondent and conversational partner, relationship type, and day of week.     

Beyond decoding deficit: inhibitory effect of positional syllable frequency in dyslexic Spanish children

This study explores whether activation and inhibition word processes contribute to the characteristic speed deficits found in transparent orthographies (Wimmer, Appl Psycholinguist 14:1–33, 1993). A second and fourth grade sample of normal school readers and dyslexic school readers participated in a lexical decision task. Words were manipulated according to two factors: word frequency (high vs. low) and syllable frequency (high vs. low). It has been repeatedly found that words with high-frequency syllables require extra time for deactivating the lexical syllabic neighbors: the so-called inhibitory effect of positional frequency syllable (Carreiras et al., J Mem Lang 32:766–780, 1993). We hypothesized that dyslexic readers would show a stronger inhibitory effect than normal readers because they are slower decoders and they may also be slower at the activation and inhibition of word representations that are competing (i.e., syllabic candidates). Results indicated an interaction between word and syllable frequency (i.e., a strong inhibitory effect was found in the low-frequency word condition). According to our hypothesis, the inhibitory effect size was almost three times bigger in dyslexics than in the normal readers. This difference shows an alteration, not a developmental lag. Interestingly, the inhibitory effect size did not interact with school grade. Thus, reading experience did not impact the lexical processes involved on the inhibitory effect. Our outcomes showed how activation and/or inhibition of lexical processes can contribute to the lack of speed beyond decoding deficit.     

A current perspective on medical informatics and health sciences librarianship.

OBJECTIVE: The article offers a current perspective on medical informatics and health sciences librarianship. NARRATIVE: The authors: (1) discuss how definitions of medical informatics have changed in relation to health sciences librarianship and the broader domain of information science; (2) compare the missions of health sciences librarianship and health sciences informatics, reviewing the characteristics of both disciplines; (3) propose a new definition of health sciences informatics; (4) consider the research agendas of both disciplines and the possibility that they have merged; and (5) conclude with some comments about actions and roles for health sciences librarians to flourish in the biomedical information environment of today and tomorrow. SUMMARY: Boundaries are disappearing between the sources and types of and uses for health information managed by informaticians and librarians. Definitions of the professional domains of each have been impacted by these changes in information. Evolving definitions reflect the increasingly overlapping research agendas of both disciplines. Professionals in these disciplines are increasingly functioning collaboratively as "boundary spanners," incorporating human factors that unite technology with health care delivery.     

The effects of self-monitoring and reinforcement on exercise adherence

Two behavioral techniques were assessed to determine their effects on subjects' adherence to unsupervised exercise. The subjects were 35 moderately fit persons who had just completed an adult fitness program (AF group) and 42 sedentary individuals who were recruited through the campus newspaper (NEWS group). Participants were randomly assigned to one of three conditions: (a) self-monitoring, (b) reinforcement supplied by another person, or (c) control. All subjects were given instructions on how to exercise and asked to exercise on their own for 18 weeks. Self-monitoring subjects kept written records of their exercise behavior, while reinforcement subjects verbally reported their exercise behavior to another person who periodically administered rewards. Pre- and posttreatment tests on the NEWS group revealed no significant treatment or interaction effects. However, the reinforcement group had an 11% improvement in predicted max VO2 and a 9 bpm improvement in exercise heart rate compared to 7.8%, 5 bpm for the self-monitoring (SM) group and 5.3%, 6 bpm for the control group. T-tests indicated that reward and SM groups improved significantly on these variables, whereas the control group did not. SM (M = 2.07) and reinforcement (M = 2.29) groups reported a significantly higher frequency of exercise per week than the control (M = 1.36) group. The AF subjects were able to maintain their fitness level (with the exception of a small increase in body fat) over the 18-week period. The behavioral interventions had little differential effect on adherence by AF subjects who were already regular exercisers.     

Relics,replicas and commemorations

Several replicas of Watson and Crick's demonstration model of DNA built at the Cavendish Laboratory in Cambridge in 1953 exist, but where is the original? Once the object of intense discussion but soon superseded by more refined models built at King's College London, it slowly fell to pieces and was eventually disassembled. Twenty years after it was first constructed, some of its pieces resurfaced at Bristol. By that time, the value attached to the original incarnation of the double helix had changed substantially, and the Science Museum in London commissioned a replica of the model, with some of the original parts built into it. The model was hailed as 'the nearest there is to the original'. It has since served as prototype for further replicas. Meanwhile the spidery model of DNA has become the ultimate icon of 20th-century life sciences, and more pieces supposedly belonging to the original continue to appear at auction.     

Communication during job promotions: A case of ongoing assimilation

This interview study examines communication during job promotions as part of the ongoing assimilation process. Results suggest promoted employees experience phases similar to those experienced by newcomers or transferees: a Pre‐Promotion Phase during which they gain experience; a Shifting Phase in which their communication changes as they develop and negotiate their new roles; and an Adjustment Phase when they feel comfortable in their new roles. Results indicate that those promoted must develop new communication relationships and skills despite remaining in the same organizational location. Unlike others making role transitions, those promoted frequently experience testing or hazing, but also appear to have more ability to change and influence their organizations.