排序方式： 共有22条查询结果，搜索用时 15 毫秒
1.
2.
Arzu Saka Lale Cerrah Ali Rıza Akdeniz Alipaşa Ayas 《Journal of Science Education and Technology》2006,15(2):192-202
The study was carried out with 175 Turkish students by using drawings at different ages understanding of gene, DNA and chromosome concepts. Students from 8th, 9th, 11th grades and, science and biology student teachers were simply asked to draw the structure of gene, DNA and chromosome in a cell and also to give explanations about these three concepts. Differences in understanding between the age groups were found to be significant for the concepts of gene and DNA. None of the groups exhibit sound understanding and regardless of the age levels, students in all groups had alternative ideas about the three concepts investigated. 相似文献
3.
Colak T Akca T Turkmenoglu O Canbaz H Ustunsoy B Kanik A Aydin S 《Journal of Zhejiang University. Science. B》2008,9(4):319-323
Objective: This prospective randomized clinical trial was conducted to evaluate the necessity of drainage after total thyroidectomy or lobectomy for benign thyroidal disorders. Methods: A total of 116 patients who underwent total thyroidectomy or lobectomy for benign thyroidal disorders were randomly allocated to be drained or not. Operative and postoperative outcomes including operating time, postoperative pain assessed by visual analogue scale (VAS), total amount of intramuscular analgesic administration, hospital stay, complications, necessity for re-operation and satisfaction of patients were all assessed. Results: The mean operating time was similar between two groups (the drained and non-drained groups). The mean VAS score was found to be significantly low in the non-drained group patients in postoperative day (POD) 0 and POD 1. The mean amount of intramuscular analgesic requirement was significantly less in the non-drained group. One case of hematoma, two cases of seroma and three cases of transient hypoparathyroidism occurred in the non-drained group, whereas one case of hematoma, two cases of seroma, two cases of wound infections and two cases of transient hypoparathyroidism occurred in the drained group. No patient needed re-operation for any complication. The mean hospital stay was significantly shorter and the satisfaction of patients was superior in the non-drained group. Conclusion: These findings suggest that postoperative complications cannot be prevented by using drains after total thyroidectomy or lobectomy for benign thyroid disorders. Furthermore, the use of drains may increase postoperative pain and the analgesic requirement, and prolong the hospital stay. In the light of these findings, the routine use of drains might not be necessary after thyroid surgery for benign disorders. 相似文献
4.
Environmental attitudes depend on the relative importance that individuals attach to themselves, other people, or all living things. These distinct bases have been found to predict environmental concern, and may act as statistically significant determinants of pro-environmental behaviours. We claim that examining the complex nature of value orientations and concern levels among elementary school students as well as the interrelationships between these attributes could guide researchers and educators in Turkey. This study aimed (1) to explore Turkish elementary students’ ecocentric and anthropocentric attitudes, and environmental apathy; (2) to investigate their egoistic, altruistic and biospheric value orientations as well as their environmental concerns; (3) to examine relationships among environment-related attributes and (4) to determine the role of gender on these attributes. Participants seemed to be highly concerned and held favourable ecocentric attitudes. Furthermore, students with higher levels of anthropocentric attitudes tended to exhibit higher levels of environmental apathy, and those expressing biospheric concerns held lower levels of egoistic concerns. The findings suggest that girls were significantly more concerned about environmental problems and tended to value nature more for its own sake than boys. 相似文献
5.
Berrin Akman Arzu Gpek Gülden Uyanik 《International Journal of Early Years Education》2000,8(3):227-234
This study was made in order to determine whether concepts are related to each other in the conceptual development of 6 year olds. The sample group of the study consisted of 40 children, 24 of which were girls and 16 were boys. The conceptual development of children was evaluated using the Bracken Basic Concept Scale (BBCS). Data were collected in a period of 8 weeks at two kindergartens, one belonging to the state and the other to the private sector. The data obtained were evaluated via the test of the significance of the difference between two matching elements. Cette étude a été exécutée pour déterminer si les concepts avaient été en rapport avec l'un l'autre dans le cours du développement conceptual des enfants au groupe de l'âge de 6 années. Le groupe des sujets a contenu de 40 enfants totaux, inclure 24 filles et 16 garçons. Les développements conceptuels des enfants ont été évalués sur le Bracken Basic Concept Scale (BBCS). Les données se sont rassemblés sur un travail qui dure pour 8 semaines dans deux jardins d'enfants institutionnels, un privé et un public. Les données rassemblés ont été évalués sur la base du test sur importance de la différence entre deux égaux. Este Estudio fue realizado para determinar si los conceptos se relacionaran a nosotros en el curso del desarollo conceptual de los niños al grupo de edad de 6 años. El grupo de ejemplos constó de de total 40 niños, incluyendo a 24 muchachas y 16 muchachos. Se evaluaron los desarollos conceptuales de los niños en el Bracken Basic Concepts Scale (BBCS). Los datos se coleccionaron en un trabajo que dure durante 8 semanas en dos jardines de infantes institucionales, uno privado y uno público. Los datos reunido se evaluaron en base a la prueba en la importancia de la diferencia entre dos partidas. 相似文献
6.
Plummer Julia D. Crowl Michele M. Tanis Ozcelik Arzu 《Research in Science Education》2021,51(5):1269-1286
Research in Science Education - Informal science educators’ (ISEs) work with young children has received limited attention in the literature. We investigated ISEs’ goals for... 相似文献
7.
This paper presents the development and initial validation of a feedback scale which measures the thoughts and affective reactions of prospective teachers concerning feedback on their teaching experiences. To reach this goal, data from 512 prospective teachers were used to test the internal consistency, exploratory and confirmative factor structure. While exploratory factor analysis was conducted on a random split-half sample of the data to examine the factor structure of the feedback scale items, confirmative factor analysis was conducted in the holdout sample. As a result of these analyses, it has been determined that the scale showed good validity and it has a structure composed of two factors; professional development and anxiety. Also, the reliability of these sub-factors of scale scores was found to be highly reliable. Overall, results suggest that this scale is a valid measurement that should reveal the viewpoints of prospective teachers regarding feedback in the form of observable behaviours for future research. 相似文献
8.
Onur Güntürkün Charlotte Koenen Fabrizio Iovine Alexis Garland Roland Pusch 《Learning & behavior》2018,46(3):229-241
We are surrounded by an endless variation of objects. The ability to categorize these objects represents a core cognitive competence of humans and possibly all vertebrates. Research on category learning in nonhuman animals started with the seminal studies of Richard Herrnstein on the category “human” in pigeons. Since then, we have learned that pigeons are able to categorize a large number of stimulus sets, ranging from Cubist paintings to English orthography. Strangely, this prolific field has largely neglected to also study the avian neurobiology of categorization. Here, we present a hypothesis that combines experimental results and theories from categorization research in pigeons with neurobiological insights on visual processing and dopamine-mediated learning in primates. We conclude that in both fields, similar conclusions on the mechanisms of perceptual categorization have been drawn, despite very little cross-reference or communication between these two areas to date. We hypothesize that perceptual categorization is a two-component process in which stimulus features are first rapidly extracted in a feed-forward process, thereby enabling a fast subdivision along multiple category borders. In primates this seems to happen in the inferotemporal cortex, while pigeons may primarily use a cluster of associative visual forebrain areas. The second process rests on dopaminergic error-prediction learning that enables prefrontal areas to connect top down the relevant visual category dimension to the appropriate action dimension. 相似文献
9.
This study examined the influence of socioeconomic (age, education, marital status, income, and health) and demographic variables and the quantity and quality of relationships with adult children, grandchildren, siblings and friends on life satisfaction of the elderly. Participants were 200 persons older than 60 years of age. Hierarchical regression analysis was used for data analysis. The three sets of regression models were run for each gender. Regression equations involved three sets of independent variables: socioeconomic, demographic, and relational (i.e., frequency, satisfaction) variables. When the three models were examined together, health and education made the highest contribution to females' life satisfaction. Health had a similar effect on the life satisfaction of males. 相似文献
10.
A bottlenose dolphin was trained to discriminate two simultaneously presented stimuli differing in numerosity (defined by
the number of constituent elements). After responding correctly to stimuli consisting of three-dimensional objects, the dolphin
transferred to two-dimensional stimuli. Initially, a variety of stimulus parameters covaried with the numerosity feature.
By systematically controlling for these stimulus parameters, it was demonstrated that some of these attributes, such as element
configuration and overall brightness, affected the animal’s discrimination performance. However, after all the confounding
parameters were under control, the dolphin was able to discriminate the stimuli exclusively on the basis of the numerosity
feature. The animal then achieved a successful transfer to novel numerosities, both intervening numerosities and numerosities
outside the former range. These findings provide substantial evidence that the dolphin could base his behavior on the numerosity
of a set independently of its other attributes and that he represented ordinal relations among numerosities. 相似文献