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Research in Science Education - Explicit-reflective nature of science (NOS) instruction has demonstrated a positive impact on student learning. Although explicit-reflective NOS instruction often... 相似文献
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James D. Klein Dalene R. Voss Robert A. Reiser Geralene N. Gardner 《Educational technology research and development : ETR & D》1987,35(4):231-238
The purpose of this study was to investigate the effects of the age of viewers and the gender of the narrator in a film, and
to examine the interaction between these two variables. Subjects in second and fifth grades were randomly assigned to two
treatment groups. One group watched a film narrated by a female and the other watched the same film narrated by a male. As
subjects watched the film, the experimenters measured their visual attention to the program. Recall of story ideas was also
measured, using a multiple-choice test. The results indicated that the gender of the narrator influenced the recall of second-graders,
but did not influence the recall of fifth-graders. Results suggest that older children pay greater visual attention to a program
than younger children. Implications for developing audio-visual materials for children are discussed. 相似文献
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While it is easy to assume that university students who wait until the last minute to complete surveys for their class research requirements provide low-quality data, this issue has not been empirically examined. The goal of the present study was to examine the relation between student research procrastination and two important data quality issues—careless responding and measurement noninvariance. Data gathered from university students across two semesters tentatively indicated that procrastination is related to low-quality survey data. Procrastination was slightly more problematic for certain data quality issues (measurement noninvariance) than others (careless responding). These relations, however, were small and contingent on how procrastination and careless responding were measured. Accordingly, it seems more beneficial for researchers to select a sampling window that supports their research goals and statistical power requirements rather than select a sampling window that attempts to minimize careless survey responding or other measurement issues. 相似文献
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Gavin R. H. Sandercock Ayodele Ogunleye Christine Voss 《European Journal of Sport Science》2016,16(1):128-134
We aimed to describe the frequency of showering after physical education (PE) in English high-school pupils. We examined differences in physical activity (PA) and cardiorespiratory fitness according to showering behaviours and examined predictors of showering. We measured PA and cardiorespiratory fitness of n = 3921 pupils (11–16 years, 53.5% males) from eight high schools. Pupils self-reported showering behaviour and parental PA levels. We calculated deprivation and distance travelled to school from their home postcode. Overall, 53% of boys and 68% of girls said they never shower after PE. Pupils who did not shower after PE were less physically active and engaged in fewer team sports. Girls who did not shower also had lower cardiorespiratory fitness than those who did. Showering behaviour varied greatly by school, so we adjusted for clustering at the school level. Pupils were more likely to shower if they were active with their parents [odds ratio (OR) = 1.72; 95% CI: 1.43, 2.07] and less likely to shower if they were from deprived areas (OR = 0.68; 95% CI: 0.52, 0.88). Showering after PE is relatively rare in English schoolchildren, particularly girls. While we cannot infer causality regarding the relationships found here, the low rates of showering and the lower PA and cardiorespiratory fitness (in girls) observed in schoolchildren who do not shower suggest research is needed to determine whether showering is a barrier to being physically active during PE. 相似文献
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Ioanna Athanasiadou Sven Christian Voss Wesal El Saftawy Mohammed Al-Maadheed Georgia Valsami Costas Georgakopoulos 《Journal of sports sciences》2020,38(16):1924-1932
ABSTRACT Athlete Biological Passport (ABP) is an indirect approach, implemented by WADA, aimed at detecting blood manipulation based on abnormal changes in haematological markers. Cases report the use of hyperhydration as masking method during anti-doping urine sample collection which could potentially mask suspicious fluctuations on ABP profiles. This study investigated the hyperhydration effect on haemoglobin concentration, reticulocyte percentage and OFF-hr score (an algorithm based on haemoglobin concentration and reticulocyte percentage), with and without recombinant human erythropoietin (rHuEPO) administration. A five-week clinical study performed; Baseline and rHuEPO Phase. Water and a sports drink were used as hyperhydration agents. To examine the hyperhydration effect on the normal ABP profile per volunteer, hyperhydration was implemented at 0, 24 and 48 hours during the baseline. During the rHuEPO phase, volunteers received Epoetin beta (3000 IU) with hyperhydration to be implemented at 0, 24 and 48 hours after drug administration. Blood and urine samples were collected and analysed according to WADA guidelines. No significant effect on ABP markers was observed due to hyperhydration at any time during the study. Pre- and post-hyperhydration data were not statistically different compared to individual baseline data. In conclusion, hyperhydration does not affect the ABP haematological markers under the examined conditions. 相似文献
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This paper points out that the growth of the cognitive movement, with its emphasis upon perception and memory, has been accompanied by a decrease in the study of learning, retention, and transfer as found in the traditional associationistic framework. Moreover, some critics have argued that the contribution of learning and memory research over the past century has been minimal. The present paper presents a general reconceptualization of learning and retention, making these concepts subordinate to the concept of transfer. This reconceptualization thus places emphasis upon prior knowledge, skills, attitudes, and other characteristics of the individual. In addition, it is argued that the general information-processing model of problem solving, especially as applied to ill-structured problems, provides a general conceptual framework for the study of learning, the model being especially useful when considering learning in academic subject-matter domains. 相似文献
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Abstract Recent international normative data for the 20-m shuttle-run test demonstrated a below-average performance index for UK children. The aims of the present study were to create an international comparison of 20-m shuttle-run test performance in a sample of English children and to identify age- and sex-specific differences in test performance. Mass, stature, body mass index, and 20-m shuttle-run test performance were measured in 2041 children aged 11 – 15 years (963 boys, 1078 girls). Performance was expressed as maximum running velocity and a performance index was created by generating z-scores. The shuttle-run test performance index was higher than the existing published value (?0.046, 95% confidence interval [CI] ?0.070 to ?0.022) for all children (0.061, 95% CI = 0.006 to 0.115), for boys (0.075, 95% CI = ?0.022 to 0.171), and for girls (0.048, 95% CI = ?0.010 to 0.106). Boys' relative performance increased significantly (F = 4.43, P = 0.002) throughout the measured age range, whereas girls' relative performance tended to decrease (F = 1.98, P = 0.096). The results were favourable when compared with existing values. Differences in performance index may be due to the different geographical areas from which present and past samples were drawn. Reasons for differences in the performance indices between boys and girls warrant further investigation. 相似文献
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Education students often complain about the style of learning practiced at universities. In addition to theoretical knowledge, they want to gain more experience with “real” students. We are investigating new ways of combining theoretical learning and practical teaching by using digital communication techniques. We design courses for the study of German in primary and secondary schools, where our students cooperate with high school students via E-mail, messageboard, and chat. We aim to interest future teachers of German language and literature in media literacy and to prepare them for their future tasks in German classrooms against the background of the new information society. We developed the coursework over the last 5 years in the light of the experience we have gained, research performed, and the changes in hardware and software. Our program can also be transferred to other fields of teacher education. 相似文献
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Christian Marx Annika Goeze Thamar Voss Verena Hoehne Viola Katharina Klotz Josef Schrader 《Zeitschrift für Erziehungswissenschaft》2017,20(1):165-200
Teachers’ pedagogical/psychological knowledge (PPK) is an important aspect of teacher competence. All conceptualisations developed so far assume that PPK is general and not specific for subjects or educational contexts. The authors take up this assumption and examine empirically whether PPK of school teachers and adult education teachers is general, i.?e. generic for subjects and educational contexts. Based on a conceptualisation validated through an expert survey (N = 44) the development of a digital test instrument with text- and videobased items is described. The article reports on the results of the structure, reliability, and DIF analyses of two PPK-facets on a total of N = 212 school and adult education teachers; analyses showed that both facets can be measured reliably with only small DIF-effects. The results point to the fact that – largely in line with the results of a literature content analysis and the expert survey – PPK is general over educational contexts. Finally, results are discussed with regard to the potentials of videobased instruments to measure teachers’ professional competence. 相似文献