首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   3019篇
  免费   181篇
  2024年   7篇
  2023年   53篇
  2022年   49篇
  2021年   66篇
  2020年   102篇
  2019年   96篇
  2018年   166篇
  2017年   168篇
  2016年   164篇
  2015年   91篇
  2014年   116篇
  2013年   380篇
  2012年   233篇
  2011年   261篇
  2010年   150篇
  2009年   59篇
  2008年   213篇
  2007年   151篇
  2006年   165篇
  2005年   95篇
  2004年   72篇
  2003年   55篇
  2002年   55篇
  2001年   17篇
  2000年   40篇
  1999年   24篇
  1998年   12篇
  1997年   13篇
  1996年   10篇
  1995年   3篇
  1994年   8篇
  1993年   8篇
  1992年   9篇
  1991年   11篇
  1990年   13篇
  1989年   11篇
  1988年   7篇
  1987年   7篇
  1985年   5篇
  1984年   3篇
  1983年   4篇
  1981年   2篇
  1978年   4篇
  1976年   2篇
  1974年   4篇
  1973年   2篇
  1971年   2篇
  1968年   2篇
  1966年   3篇
  1965年   2篇
排序方式: 共有3200条查询结果,搜索用时 31 毫秒
261.
This research aims to analyze the relationship between sociocultural values and human food preferences. The latter, as shown in this paper, are greatly influenced by cultural identity. This work stems from a theoretical context that originated in Europe and the United States towards the mid‐twentieth century, within the field of the anthropology of food. A qualitative and quantitative analysis has been performed in the Comunidad Autónoma de Aragón (Spain). Research methods include focus groups, in‐depth interviews, participant observation, and a questionnaire that was handed out to a representative sample of the Aragonese population (816 people over 21 years of age; confidence level of 95.5% and error margin of ±3.5). Regarding the research outcome, a highly significant qualitative and quantitative connection has been found between food selection and cultural identity. In other words, people prefer to consume foods that are symbolically associated with their own culture, in order to reinforce their sense of belonging. Although this study has been carried out in Aragón, it is our belief that the results can be generalized to other areas. The originality and interest of our findings are notable considering that, to date, few works have analyzed the sociocultural factors motivating food behavior. Moreover, these results could be used by public and private organizations to meet objectives such as health promotion and product marketing.  相似文献   
262.
Der Aufsatz schildert den platonisierenden Antipsychologismus welchen Bolzano, der junge Brentano, Twardowski, Meinong, der Husserl der Logischen Untersuchungen, Frege, der Russell der Jahrhundertwende und der junge Wittgenstein philosophisch vertraten, und versucht eine soziologische und ideologiekritische Interpretation sowohl dieser Einstellung als auch derjenigen des traditionellen Psychologismus des achtzehnten Jahrhunderts. Der Platonismus des neunzehnten und zwanzigsten Jahrhunderts wird als ein Ausdruck fiir ‐ oder vielmehr als eine Reaktion gegen ‐ den Verfall der klassischen burgerlichen Werte aufgefaBt. In Wittgensteins Tractatus spielen Elemente sowohl eines platonisierenden Antipsychologismus wie auch eines relativistischen, verhaltensphanomenologisch orientierten Antipsychologismus eine Rolle: dieses Werk wird also als eine grelle Manifestation des Uberganges von der klassischen zur spatbiirgerlichen Weltanschauung, als ein Obergang vom Glauben an ewige Wahrheiten zur Hinnahme einer Gebrauchs‐Theorie der Bedeutung und deren Konsequenzen interpretiert.  相似文献   
263.
The effectiveness of the mnemonic-keyword method was investigated in 4 experiments in which participants were required to learn the lst-language (L1, Spanish) equivalents of a list of 30 2nd-language words (L2, Latin). Experiments 1 (adolescents) and 2 (adults) were designed to assess whether the keyword method was more effective than the rote method; the researcher supplied the keyword, and the participants were allowed to pace themselves through the list. Experiments 3 (adolescents) and 4 (adults) were similar to Experiments 1 and 2 except that the participants were also supplied with a drawing that illustrated the relationship between the keyword and the L1 target word. All the experiments were performed with groups of participants in their classrooms (i.e., not in a laboratory context). In all experiments, the rote method was significantly more effective than was the keyword method.  相似文献   
264.
The authors’ aim was to examine whether short-term kinesthetic training affects the level of sensorimotor rhythm (SMR) in different frequency band: alpha (8–12 Hz), lower beta (12.5–16 Hz) and beta (16.5–20 Hz) during the execution of a motor imagery task of closing and opening the right and the left hand by experts (jugglers, practicing similar exercises on an everyday basis) and amateurs (individuals not practicing any sports). It was found that the performance of short kinesthetic training increases the power of alpha rhythm when executing imagery tasks only in the group of amateurs. Therefore, kinesthetic training may be successfully used as a method increasing the vividness of motor imagery, for example, in tasks involving the control of brain–computer interfaces based on SMR.  相似文献   
265.
We aim to analyze the effects of an 8-month physical activity intervention on cardiorespiratory fitness, body mass index (BMI), and vigilance performance in an adult obese population. We conducted an 8-month physical activity intervention based on dance and rhythmic activities. The weekly frequency was 2 sessions of 1 hr per day. Training sessions were divided into 3 phases: a 10-min warm-up, 40 min of dance and rhythmic activities, and 10 min to cool-down. To assess cardiorespiratory fitness, participants performed a modified version of the 6-min walk test from the Senior Fitness Test battery (Larsson & Mattsson, 2001; Rikli & Jones, 1999). Vigilance performance was measured by means of the psychomotor vigilance task (PVT). Two measurements were performed immediately before and after the intervention. The results revealed that participants improved their cardiorespiratory fitness, BMI, and vigilance performance after the intervention. All in all, findings contribute new empirical evidence to the field that investigates the benefits of physical activity intervention on cognitive processes in obese population.  相似文献   
266.
The purpose of this study was to test the effect of short-term training on reaching behavior in infants at the onset of reaching. The study was a single-blind, parallel group design, randomized controlled clinical trial. Thirty healthy infants were randomly assigned to a social control group (n = 15) or a reaching training group (n = 15). Infants began the study up to 3 days after the onset of reaching and were assessed three times across 2 days: pretraining (before training), posttraining 1 (after 1 session of training), and posttraining 2 (after 3 sessions of training). The reaching training group received 3 sessions of training by a physical therapist while the control group received a similar amount of time sitting in the therapist's lap. The data were analyzed using repeated-measures analyses of variance, and independent-samples tests with Bonferroni adjustments. Short-term training resulted in increased frequency of object contacts, shorter and smoother reaches, and improved hand positioning. The few short training sessions likely provided opportunities for infants to explore and learn to select movements from their existing movement repertoire. These results demonstrate that adaptive changes in infants' novel behaviors can emerge rapidly, and highlight the need for increased understanding of how to most effectively time early interventions.  相似文献   
267.
Psychotic (P) and Non-Psychotic (N-P) retardates were compared on 13 Rorschach “indicators” of psychosis using a matched pairs technique. Two of the 13 signs were found to significantly differentiate between groups with the P group demonstrating a lower F% and higher C' responding than the N-P group.  相似文献   
268.
The current study aimed to determine potential differences in dynamic stability control during perturbed walking across the adult female lifespan and to test the hypothesis that such differences can be assessed by a reduced kinematic model. 11 young-aged (22–30 years), 9 middle-aged (41–59 years) and 14 old-aged (62–75 years) female adults walked on a treadmill while the right leg was unexpectedly perturbed once during the swing phase. Margin of stability (MS) at touchdown was investigated using a full body and a reduced kinematic model. After the perturbation, all age groups showed a lower MS compared to non-perturbed gait (baseline), leading to negative MS. Four old-aged adults failed to cope with the task (only preventing a fall by grasping). The remaining ten old-aged and the middle-aged subjects required three more recovery steps than the young-aged adults to get back to baseline MS. Moreover, there were no differences between kinematic models, and both methods demonstrated similar age-related findings. We concluded that the ability to control dynamic stability during perturbed walking by enlarging the base of support has already begun to deteriorate by middle age. Further, the valid agreement between kinematic models shows that such differences can be assessed by using just four body markers.  相似文献   
269.
The malleability of the infrahumanization bias was tested varying the physical context in which the ingroup and the outgroup target were assessed. Using a sequential priming paradigm, Study 1 replicated the infrahumanization bias in a neutral context. Study 2 tested the hypothesis that there are contextual variations in infrahumanization. Specifically, Black targets were infrahumanized in a context familiar to White participants, and not in an unfamiliar context. Study 3 revealed that participants’ threat perceptions were reduced when ingroup targets appeared in familiar context, compared to Black targets. Theoretical implications for the infrahumanization bias are discussed.  相似文献   
270.
Resumen

Ante el hecho sobradamente constatado de que el episodio esquizofrénico es profundamente desorganizador y su recuperación difícil e impredectible, se está prestando, en años recientes, una especial atención y esfuerzo al desarollo y puesta en práctica de programas preventivos. El modelo de vulnerabilidad a la esquizofrenia parece configurarse como el marco teórico y de trabajo más adecuado para tales programas. Tras revisar los postulados básicos de dicho modelo se presenta una revisión de los más relevantes estudios experimentales que están permitiendo la identificación de marcadores cognitivos de vulnerabilidad a la esquizofrenia en poblaciones de «alto riesgo». Se apunta, a continuación, la posibilidad de elaborar una batería que permita la identificación precoz de los sujetos que podrían convertirse en esquizofrénicos. Se analiza someramente algunos de los más importantes programas preventivos de esquizofrenia y se concluye que aún es pronto para emitir un juicio acerca de la eficacia de los mismos. Se deja patente, finalmente, que si bien todavía no estamos preparados para prevenir la esquizofrenia nos encontramos en el camino adecuado para conseguirlo.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号