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991.
Sterling Stauffer Melissa Allen Heath Sarah Marie Coyne Scott Ferrin 《Psychology in the schools》2012,49(4):352-367
Recent meta‐analyses indicate that bully prevention programs produce minimal change in student behavior. This study examined 66 high school teachers' perceptions regarding the effect of cyberbullying on students, which intervening strategies teachers would use when dealing with cyberbullying, and which prevention strategies would assist in preventing cyberbullying. Almost one fourth of teachers indicated cyberbullying does not have long‐lasting negative effects and that cyberbullying “prepares students for life.” Fewer than half of teachers favored implementing a formal cyberbully prevention program. Teachers perceived the following strategies as most helpful in addressing cyberbullying: increasing parental involvement, warning students about consequences for cyberbullying, and increasing consequences for cyberbullying. School administrators should consider teachers' perceptions before implementing prevention programs that target cyberbullying. Additionally, strategies should consider fostering greater teacher buy‐in, thus improving intervention fidelity and creating a unified effort focused on decreasing student cyberbullying. © 2012 Wiley Periodicals, Inc. 相似文献
992.
Wood JJ Lynne-Landsman SD Langer DA Wood PA Clark SL Eddy JM Ialongo N 《Child development》2012,83(1):351-366
This study tests a model of reciprocal influences between absenteeism and youth psychopathology using 3 longitudinal datasets (Ns = 20,745, 2,311, and 671). Participants in 1st through 12th grades were interviewed annually or biannually. Measures of psychopathology include self-, parent-, and teacher-report questionnaires. Structural cross-lagged regression models were tested. In a nationally representative data set (Add Health), middle school students with relatively greater absenteeism at Study Year 1 tended toward increased depression and conduct problems in Study Year 2, over and above the effects of autoregressive associations and demographic covariates. The opposite direction of effects was found for both middle and high school students. Analyses with 2 regionally representative data sets were also partially supportive. Longitudinal links were more evident in adolescence than in childhood. 相似文献
993.
The hypothesis that language plays a role in theory-of-mind (ToM) development is supported by a number of lines of evidence (e.g., H. Lohmann & M. Tomasello, 2003). The current study sought to further investigate the relations between maternal language input, memory for false sentential complements, cognitive flexibility, and the development of explicit false belief understanding in 91 English-speaking typically developing children (M age = 61.3 months) and 30 children with specific language impairment (M age = 63.0 months). Concurrent and longitudinal findings converge in supporting a model in which maternal language input predicts the child's memory for false complements, which predicts cognitive flexibility, which in turn predicts explicit false belief understanding. 相似文献
994.
995.
The aim of this study was to investigate the theory that visual magnocellular deficits seen in groups with dyslexia are linked
to reading via the mechanisms of visual attention. Visual attention was measured with a serial search task and magnocellular
function with a coherent motion task. A large group of children with dyslexia (n = 70) had slower serial search times than a control group of typical readers. However, the effect size was small (η
p2 = 0.05) indicating considerable overlap between the groups. When the dyslexia sample was split into those with or without
a magnocellular deficit, there was no difference in visual search reaction time between either group and controls. The data
suggest that magnocellular sensitivity and visual spatial attention weaknesses are independent of one another. They also provide
more evidence of heterogeneity in response to psychophysical tasks in groups with dyslexia. Alternative explanations for poor
performance on visual attention tasks are proposed along with avenues for future research. 相似文献
996.
Stephen?KlassenEmail author Mansoor?Niaz Don?Metz Barbara?McMillan Sarah?Dietrich 《Science & Education》2012,21(5):729-743
The literature on the pedagogical aspects of the photoelectric effect as used in the undergraduate student laboratory shows
that little research has been done in this area. Our current study is an analysis of the instructions in 38, electronically
published laboratory manuals for the photoelectric effect. The analyses were based on history and philosophy of science criteria
that we had developed for evaluating the presentation of the photoelectric effect in introductory, university-physics textbooks.
The results show that writers of laboratory instructions do not pay sufficient attention to the relevant background for the
photoelectric effect. In our study, none of the instructions achieved a score of excellent, only 5% were scored as satisfactory,
and only 7% mentioned the various aspects contained in our criteria. These results for our analysis of laboratory instructions
are significantly less favorable than those achieved for physics textbooks in our previous study. Based on our work, we recommend
that several historical aspects be included in all laboratory instructions for the photoelectric effect. 相似文献
997.
Deborah L. King Sarah L. Smith Michele R. Brown Jean L. Mccrory Barry A. Munkasy Gary I. Scheirman 《Sports biomechanics / International Society of Biomechanics in Sports》2013,12(2):222-237
In this study, we compared the kinematic variables of the split triple twist with those of the split double twist to help coaches and scientists understand these landmark pair skating skills. High-speed video was taken during the pair short and free programmes at the 2002 Salt Lake City Winter Olympics and the 2003 International Skating Union Grand Prix Finals. Three-dimensional analyses of 14 split double twists and 15 split triple twists from eleven pairs were completed. In spite of considerable variability in the performance variables among the pairs, the main difference between the split double twists and split triple twists was an increase in rotational rate. While eight of the eleven pairs relied primarily on an increased rotational rate to complete the split triple twist, three pairs employed a combined strategy of increased rotational rate and increased flight time due predominantly to delayed or lower catches. These results were similar to observations of jumps in singles skating for which the extra rotation is typically due to an increase in rotational velocity; increases in flight time come primarily from delayed landings as opposed to additional height during flight. Combining an increase in flight time and rotational rate may be a good strategy for completing the split triple twist in pair skating. 相似文献
998.
Mostafa Yaghoubi Sally D. Lark Wyatt H. Page Philip W. Fink Sarah P. Shultz 《Sports biomechanics / International Society of Biomechanics in Sports》2013,12(6):636-648
A rugby scrum’s front row must act uniformly to transfer maximal horizontal force and improve performance. This study investigated the muscle activation patterns of lower extremity muscles in front row forwards during live and machine scrums at professional and amateur levels. Electromyography was collected bilaterally on vastus lateralis, rectus femoris and gastrocnemius muscles of 75 male rugby prop players during live and machine scrums. ANOVAs compared muscle reaction time, rate of change in muscle amplitude and muscle amplitude between groups and conditions. Cross-correlation analysis explored muscle synchronicity. There were significantly greater rates of change in each muscle amplitude in professional players than amateur players. Additionally, there was significantly quicker muscle reaction time in all muscles, and greater amplitude in vastus lateralis and gastrocnemius, during the live scrum vs. machine condition. The professional props produced more synchronised muscle activation than amateur players and all players produced more synchronised muscle activation against the scrum machine vs. live scrummage. The results indicate a higher skill proficiency and muscle synchronicity in professional players. While scrum machine training is ideally suited for functional muscle strengthening during practice, to truly simulate the requirements of the scrum, training should incorporate the live situation as much as possible. 相似文献
999.
Brian E. Udermann John M. Mayer Steven R. Murray 《Research quarterly for exercise and sport》2013,84(4):434-437
Abstract One hundred and eighteen national collegiate fencers engaged in the first round competition in the 28th annual NCAA Fencing Championships held at the University of Illinois, Chicago Circle Campus. After the first day of competition, the field size was reduced to 72 fencers or 24 fencers per weapon. Through the use of a unique scoring device, response times and accuracy measurements were recorded for each fencer. The fencers then engaged in their respective round robin tournament according to class of weapon; epee, sabre, or foil. Two criterion measures of fencing success were then correlated with response times and accuracies. Correlation coefficients for sabre fencemen were slightly better than 0. Criterion measures for epee fencers showed a low relationship with response time and accuracies while those of foil showed a slight to fair relationship. 相似文献
1000.
Philip M. Sadler Harold Coyle Nancy Cook Smith Jaimie Miller Joel Mintzes Kimberly Tanner John Murray 《CBE life sciences education》2013,12(3):553-575
We report on the development of an item test bank and associated instruments based on the National Research Council (NRC) K–8 life sciences content standards. Utilizing hundreds of studies in the science education research literature on student misconceptions, we constructed 476 unique multiple-choice items that measure the degree to which test takers hold either a misconception or an accepted scientific view. Tested nationally with 30,594 students, following their study of life science, and their 353 teachers, these items reveal a range of interesting results, particularly student difficulties in mastering the NRC standards. Teachers also answered test items and demonstrated a high level of subject matter knowledge reflecting the standards of the grade level at which they teach, but exhibiting few misconceptions of their own. In addition, teachers predicted the difficulty of each item for their students and which of the wrong answers would be the most popular. Teachers were found to generally overestimate their own students’ performance and to have a high level of awareness of the particular misconceptions that their students hold on the K–4 standards, but a low level of awareness of misconceptions related to the 5–8 standards. 相似文献