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Reported Changes (reported + change)
Selected AbstractsAffective response to 5 µT ELF magnetic field-induced physiological changesBIOELECTROMAGNETICS, Issue 2 2007Paul Stevens Abstract Research into effects of weak magnetic fields (MFs) at biologically relevant frequencies has produced ambiguous results. Although they do affect human physiology and behaviour, the direction of effects is inconsistent, with a range of complex and unrelated behaviours being susceptible. A possible explanation is that these effects, rather than being directly caused, are instead related to changes in affective state. A previous study showed that MFs altered the affective content of concurrent perceptions, but it was unclear whether the emotional response was direct or indirect. Here it is shown that exposure to a 0,5 µT MF (DC-offset sinudsoidal wave form) within EEG ,-band frequencies (8,12 Hz), results in a reported change in emotional state. This relates to a decrease global field power but lacks the frontal ,-asymmetry that would physiologically indicate a directly induced emotional state, suggesting that participant experiences are due to an interpretation of the effects of MF exposure. Bioelectromagnetics © 2006 Wiley-Liss, Inc. [source] Long-term changes in the trophic level of the Celtic Sea fish community and fish market price distributionJOURNAL OF APPLIED ECOLOGY, Issue 3 2002J. K. Pinnegar Summary 1The intensive exploitation of fish communities often leads to substantial reductions in the abundance of target species, with ramifications for the structure and stability of the ecosystem as a whole. 2We explored changes in the mean trophic level of the Celtic Sea (ICES divisions VII f,j) fish community using commercial landings, survey data and estimates of trophic level derived from the analysis of nitrogen stable isotopes. 3Our analyses showed that there has been a significant decline in the mean trophic level of survey catches from 1982 to 2000 and a decline in the trophic level of landings from 1946 to 1998. 4The decline in mean trophic level through time resulted from a reduction in the abundance of large piscivorous fishes and an increase in smaller pelagic species which feed at a lower trophic level. 5Similar patterns of decline in the trophic level of both catches and landings imply that there have been substantial changes in the underlying structure of the Celtic Sea fish community and not simply a change in fishery preferences. 6We suggest that the reported changes in trophic structure result from reductions in the spawning stock biomass of traditional target species associated with intensive fishing, together with long-term climate variability. 7The relative distribution of fish market prices has changed significantly over the past 22 years, with high trophic level species experiencing greater price rises than lower trophic level species. 8Although decreased abundance of high trophic level species will ultimately have negative economic consequences, the reduction in mean trophic level of the fish community as a whole may allow the system to sustain higher fishery yields. 9Management objectives in this fishery will depend on the relative values that society attaches to economic profit and protein production. [source] Health Promotion and Risk Reduction in Malawi, Africa, Village WomenJOURNAL OF OBSTETRIC, GYNECOLOGIC & NEONATAL NURSING, Issue 2 2001FAAN, Susan Gennaro RN Objective: A train-the-trainer intervention was evaluated in which village leaders in Malawi, Africa, taught other villagers how to improve their health. Design: Health knowledge and reported health practices were compared before and after the educational intervention in 15 villages in Chimutu, Malawi, Africa. Setting: Surveys were completed by trained data gatherers in the village setting. Patients/Participants: All men and women of childbearing age who were present in the village when data collection occurred were asked to participate. There were 187 participants in the preintervention survey and 175 participants in the postintervention survey. Intervention: Seveniy-six village women were trained, using low literacy techniques, to provide content on health promotion and risk reduction in pregnancy. Over 20,000 persons have received at least one health teaching session from the village trainers. Results: The intervention resulted in reported changes in prenatal and postpartum care and in more births occurring in the hospital or clinic. Some positive nutritional changes were reported, although few changes in beliefs about use of herbal medicines or about the use of witchcraft were reported. Conclusions: A train-the-trainer approach is a sustainable intervention that appears to have positive benefits on the health of village women living in Malawi, Africa. [source] Adolescent Behavioral, Affective, and Cognitive Engagement in School: Relationship to DropoutJOURNAL OF SCHOOL HEALTH, Issue 9 2009Isabelle Archambault PhD ABSTRACT BACKGROUND: High school dropout represents an important public health issue. This study assessed the 3 distinct dimensions of student engagement in high school and examined the relationships between the nature and course of such experiences and later dropout. METHODS: We administered questionnaires to 13,330 students (44.7% boys) from 69 high schools in the province of Quebec (Canada). During 3 consecutive high school years, students reported their behavioral, emotional, and cognitive engagement to school. Information on later dropout status was obtained through official records. RESULTS: Although many adolescents remained highly engaged in high school, one third reported changes, especially decreases in rule compliance, interest in school, and willingness to learn. Students reporting low engagement or important decrements in behavioral investment from the beginning of high school presented higher risks of later dropout. CONCLUSION: School-based interventions should address the multiple facets of high school experiences to help adolescents successfully complete their basic schooling. Creating a positive social-emotional learning environment promises better adolescent achievement and, in turn, will contribute to a healthier lifestyle. [source] Standardizing evaluation of on-line continuing medical education: Physician knowledge, attitudes, and reflection on practiceTHE JOURNAL OF CONTINUING EDUCATION IN THE HEALTH PROFESSIONS, Issue 2 2004Associate Director, Dr. Linda Casebeer PhD Associate Professor Abstract Introduction: Physicians increasingly earn continuing medical education (CME) credits through on-line courses, but there have been few rigorous evaluations to determine their effects. The present study explores the feasibility of implementing standardized evaluation templates and tests them to evaluate 30 on-line CME courses. Methods: A time series design was used to compare the knowledge, attitudes, and reported changes in practice of physician participants who completed any of 30 on-line CME courses that were hosted on an academic CME Web site and a CME Web portal during the period from August 1, 2002, through March 31, 2003. Data were collected at baseline, at course completion, and 4 weeks later. Paired t tests were used to compare the means of responses across time. Results: U.S. physicians completed 720 post-tests. Quality of content was the characteristic of most importance to participants; too little interaction was the largest source of dissatis-faction. Overall mean knowledge scores increased from 58.1% to 75.6% at post-test and then decreased to 68.2% at 4 weeks following the course. Effect sizes of increased knowledge immediately following the course were larger for case-based than for text-based courses. Nearly all physicians reported making changes in practice following course completion, although reported changes differed from expected changes. Conclusions: Increases in physician knowledge and knowledge retention were demonstrated following participation in on-line CME courses. The implementation of standardized evaluation tests proved to be feasible and allowed longitudinal evaluation analyses across CME providers and content areas. [source] | |||||||||||||