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ResumenEsta investigación trata, en líneas generales, sobre los factores que influyen en el desarrollo de ta memoria. En ella se enfatiza el papel del conocimiento previo del sujeto, frente al de las estrategias mnemónicas deliberadas, como responsable del incremento del nivel de recuerdo en los niños de E.G.B. Este trabajo es congruente con la Teoría de los Niveles de Procesamiento de la Información propuesta por Craik y Lockart (1972) y revisada por Craik y Tulving (1975). En el experimento se demuestra que aquellos niños a los que se les da una información previa congruente con la información a recordar obtienen mejores resultados mnésicos que aquellos que carecen de ella. Por último se hace una serie de consideraciones pedagógicas basadas en los resultados obtenidos en el experimento. 相似文献
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AbstractThis study had three goals: to analyze gender differences in victimization, perception of school violence, and social behaviour; to study the relations between these variables; and to identify variables predicting victimization. A correlational methodology was employed, and three assessment instruments were administered. The sample was made up of 178 participants aged between 13 and 15 years. The results yielded no gender differences in victimization; however, females perceived more verbal abuse and performed more behaviours of help-collaboration, whereas males scored higher in negative social behaviours (aggressiveness-stubbornness, dominance, apathy-withdrawal). The bullying victims of both sexes had a high perception of school violence; moreover, victimized males performed few behaviours of help-collaboration and assurance-firmness, whereas victimized females displayed many behaviours of social anxiety. Six variables predicted victimization: high perception of violence through information and communication technologies, high social anxiety, lower age, little aggressive behaviour, high perception of verbal abuse, and few behaviours of help-collaboration. 相似文献
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Maximal strength and power, muscle mass, endurance and serum hormones in weightlifters and road cyclists 总被引：1，自引：0，他引：1
Izquierdo M Ibáñez J Häkkinen K Kraemer WJ Ruesta M Gorostiaga EM 《Journal of sports sciences》2004,22(5):465-478
Maximal strength, power, muscle cross-sectional area, maximal and submaximal cycling endurance characteristics and serum hormone concentrations of testosterone, free testosterone and cortisol were examined in three groups of men: weightlifters (n = 11), amateur road cyclists (n = 18) and age-matched controls (n = 12). Weightlifters showed 45-55% higher power values than road cyclists and controls, whereas the differences in maximal strength and muscle mass were only 15% and 20%, respectively. These differences were maintained when average power output was expressed relative to body mass or relative to muscle cross-sectional area. Road cyclists recorded 44% higher maximal workloads, whereas submaximal blood lactate concentration was 50-55% lower with increasing workload than in controls and weightlifters. In road cyclists, workloads associated with blood lactate concentrations of 2 and 4 mmol.l-1 were 50-60% higher and occurred at a higher percentage of maximal workload than in weightlifters or controls. Basal serum total testosterone and free testosterone concentrations were lower in elite amateur cyclists than in age-matched weightlifters or untrained individuals. Significant negative correlations were noted between the individual values of maximal workload, workloads at 2 and 4 mmol.l-1 and the individual values of muscle power output (r = -0.37 to -0.49), as well as the individual basal values of serum total testosterone and free testosterone (r = -0.39 to -0.41). These results indicate that the specific status of the participants with respect to training, resistance or endurance is important for the magnitude of the neuromuscular, physiological and performance differences observed between weightlifters and road cyclists. The results suggest that, in cycling, long-term endurance training may interfere more with the development of muscle power than with the development of maximal strength, probably mediated by long-term cycling-related impairment in anabolic hormonal status. 相似文献
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A growing, sizable proportion of school children do not live in conventional family environments. Among these, internationally adopted children have gained increasing visibility in recent years. While other areas of their behavior have been widely explored, little is known about adopted children's social competence and their integration into peer groups. This study, involving 148 children between 4 and 8 years of age, compared 40 internationally adopted children with 50 children who were residing in institutions for children and 58 community comparison children. Social competence, problems with peers and friendship relationships were assessed using SSRS and SDQ, with both parents/caretakers and teachers as the informants. The sociometric status of the children and their friendship relationships were obtained through their teachers’ reports. The results showed statistically significant differences between children living in institutions (more problems with peers, poorer social skills and sociometric status) and those in family environments, whether adopted and non-adopted. Also, the results suggest some minor differences between the adopted and the comparison children, the former with greater visibility and the latter with higher sociometric status in the peer group. 相似文献
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Maria Salinas Maite López-Garrigós Emilio Flores Joaquín Uris Carlos Leiva-Salinas 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2015,25(3):410-415
Introduction
The study was performed to compare and analyze the inter-departmental variability in the request of rarely requested laboratory tests in primary care, as opposed to other more common and highly requested tests.Materials and methods
Data from production statistics for the year 2012 from 76 Spanish laboratories was used. The number of antinuclear antibodies, antistreptolysin O, creatinine, cyclic citrullinated peptide antibodies, deaminated peptide gliadine IgA antibodies, glucose, protein electrophoresis, rheumatoid factor, transglutaminase IgA antibodies, urinalysis and uric acid tests requested was collected. The number of test requests per 1000 inhabitants was calculated. In order to explore the variability the coefficient of quartile dispersion was calculated.Results
The smallest variation was seen for creatinine, glucose, uric acid and urinalysis; the most requested tests. The tests that were least requested showed the greatest variability.Conclusion
Our study shows through a very simplified approach, in a population close to twenty million inhabitants, how in primary care, the variability in the request of laboratory tests is inversely proportional to the request rate.Key words: primary care, laboratory proficiency testing, clinical laboratory services, test requesting, preanalytical phase 相似文献8.
Maria Salinas Maite López-Garrigós Emilio Flores María Leiva-Salinas Miguel Ahumada Carlos Leiva-Salinas 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2015,25(2):237-241
Introduction
Pre-preanalytical and post-postanalytical phases are steps where the laboratory professional may play a crucial role. Measuring the serum circulating 25 hydroxyvitamin D level (25(OH)D) is recommended to evaluate vitamin D status in patients at risk for vitamin D deficiency while 1,25 hydroxyvitamin D (1,25(OH)2D) is only recommended to monitor several particular conditions (chronic kidney disease, hereditary phosphate-losing disorders, and some other) clearly defined by the current clinical guidelines of Endocrine Society.Our research hypothesis was that through education and communication through comments in the Laboratory Information System (LIS), we could improve appropriateness in the request vitamin D tests.
Materials and methods
A retrospective observational cross-sectional study was conducted from January 2005 to December 2014. Each 1,25(OH)2D request was reviewed individually by a member of the laboratory staff. Starting in November 2011, each inappropriate 1,25(OH)2D request was registered in LIS and 25(OH)D was measured instead of 1,25(OH)2D. We counted the overall number of 1,25(OH)2D requests and the number of inappropriate requests which then were marked with a comment.Results
The request of 25(OH)D increased along years. However, 1,25(OH)2D requests increased until 2012 when demand began to diminish.Conclusions
Education and communication through comments in the LIS, corrected the inappropriate request of 1,25(OH)2D and promoted the use of 25(OH)D to study vitamin D deficiency.Key words: clinical laboratory services, utilization, vitamin D, communication, education 相似文献9.
Ainhoa Álvarez Maite Martín Isabel Fernández-Castro Maite Urretavizcaya 《Interactive Learning Environments》2016,24(6):1176-1197
Currently, most of the educational approaches applied to higher education combine face-to-face (F2F) and computer-mediated instruction in a Blended-Learning (B-Learning) approach. One of the main challenges of these approaches is fully integrating the traditional brick-and-mortar classes with online learning environments in an efficient and flexible way. In this paper, we present a set of requirements to be met by a computer system in order to adequately support both students and teachers in a B-Learning context. Then, it defines a suitable conceptual architecture to meet the requirements, and the multi-agent implementation of the architecture. Next, it presents the evaluation of the functionality implemented. Finally some conclusions are drawn. 相似文献
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Meta-analysis refers to the statistical methods used in research synthesis for combining and integrating results from individual studies. In this regard meta-analytical studies share with narrative reviews the goal of synthesizing the scientific literature on a particular topic, while as in the case of standard articles they present new results. This study aims to identify the potential similarities and differences between meta-analytical studies, reviews and standard articles as regards their impact and structural features in the field of psychology. To this end a random sample of 335 examples of each type of document were selected from the Thomson Reuters Web of Science database. The results showed that meta-analytical studies receive more citations than do both reviews and standard articles. All three types of documents showed a similar pattern in terms of institutional collaboration, while reviews and meta-analytical studies had a similar number of authors per document. However, reviews had a greater number of references and pages than did meta-analytical studies. The implications of these results for the scientific community are discussed. 相似文献