全文获取类型
收费全文 | 7606篇 |
免费 | 489篇 |
国内免费 | 168篇 |
专业分类
8263篇 |
出版年
2024年 | 16篇 |
2023年 | 115篇 |
2022年 | 139篇 |
2021年 | 167篇 |
2020年 | 253篇 |
2019年 | 209篇 |
2018年 | 387篇 |
2017年 | 391篇 |
2016年 | 359篇 |
2015年 | 230篇 |
2014年 | 293篇 |
2013年 | 1003篇 |
2012年 | 584篇 |
2011年 | 598篇 |
2010年 | 384篇 |
2009年 | 246篇 |
2008年 | 486篇 |
2007年 | 378篇 |
2006年 | 370篇 |
2005年 | 280篇 |
2004年 | 186篇 |
2003年 | 170篇 |
2002年 | 153篇 |
2001年 | 75篇 |
2000年 | 109篇 |
1999年 | 59篇 |
1998年 | 33篇 |
1997年 | 28篇 |
1996年 | 29篇 |
1995年 | 27篇 |
1994年 | 25篇 |
1993年 | 27篇 |
1992年 | 39篇 |
1991年 | 30篇 |
1990年 | 35篇 |
1989年 | 30篇 |
1988年 | 30篇 |
1987年 | 20篇 |
1986年 | 14篇 |
1985年 | 18篇 |
1984年 | 17篇 |
1983年 | 13篇 |
1979年 | 15篇 |
1978年 | 13篇 |
1976年 | 14篇 |
1974年 | 12篇 |
1971年 | 12篇 |
1968年 | 13篇 |
1966年 | 12篇 |
1965年 | 12篇 |
排序方式: 共有8263条查询结果,搜索用时 0 毫秒
241.
Christie-Mizell CA 《Family process》2003,42(2):237-251
The objective of this research is to explore how the relationship between interparental discord and child's self-concept shapes participation in bullying behavior by elementary and middle-school children. The main finding is that child's self-concept mediates the effects of interparental discord on bullying behavior. Further, the results of the study support a symbolic interactionist view of child self-development, in which children internalize the environment provided by parents. This internalization gives way to self-concept, which guides behavior. This study adds to the growing body of literature that seeks to understand whether and how characteristics of children mediate the effects of parental attributes on behavioral outcomes. The proposed implications for the prevention of bullying include building children's self-concept, intervening in parental conflict, and involving the entire family system in the intervention process. 相似文献
242.
This research replicated and extended a study by Williams, Donley, and Keller (2000). In that study, children with autism received a box with an object inside and learned to ask “What's that?,” “Can I see it?,” and “Can I have it?” to have the name of the object, to see the object, and to get the object, respectively. The purpose of the present research was to determine if the three questions (a) were three independent repertoires of behavior, (b) constituted three instances of a single functional response class, or (c) belonged to a chain of behavior. The 3 boys with autism who participated responded independently to each question when the consequences for each question were altered. This indicates that the three target responses were three independent repertoires of behavior, each one reinforced and maintained with its specific consequences. Thus, this procedure serves to teach children with autism to ask questions with flexibility according to a variable context. 相似文献
243.
The effectiveness of the mnemonic-keyword method was investigated in 4 experiments in which participants were required to learn the 1st-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
244.
A large sex difference has been elicited on the Vandenberg-Kuse mental rotation test. Prior research emphasizes the biological root of this sex difference. In recent experiments we confirmed this viewpoint. A large sample was administered the test, and the distributions of scores for men and women (N = 138; 68 men and 70 women: ages 19 to 23 years). The mean scores were used as cut-off points to group the men and the women in different subgroups (Low/Women, High/Women, Low/Men, High/Men). There were large differences among all subgroups, reinforcing Kimura's testosterone hypothesis for sex differences in spatial ability. 相似文献
245.
Although positive effect of touch on compliance has been widely reported, new evaluation was made with an unusual request. 80 male bus drivers were solicited by a male or a female confederate to take the bus despite having too little money for the fare. Bus drivers were briefly touched by the confederate during solicitation. Analysis showed that bus drivers who were touched accepted the request more favorably but only when made by a female. 相似文献
246.
Esmorís-Arranz FJ Pardo-Vázquez JL Vázquez-García GA 《Journal of experimental psychology. Animal behavior processes》2003,29(4):334-340
To test several predictions derived from a behavior-systems approach, the authors assessed Pavlovian fear conditioning in rats after 30 trials of forward, simultaneous, or unpaired training. Direct evidence of conditioned fear was collected through observation of flight and freezing reactions during presentations of the conditioned stimulus (CS) alone. The authors also tested the CS's potential to reinforce an instrumental escape response in an escape-from-fear paradigm. On the one hand, rats that received forward training showed conditioned freezing, but no conditioned flight was observed. On the other hand, rats that received simultaneous training showed conditioned flight, but no conditioned freezing was observed. Rats that received either forward or simultaneous pairings showed instrumental learning of the escape-from-fear response. Implications for several theories of Pavlovian conditioning are discussed. 相似文献
247.
Nourrit D Delignières D Caillou N Deschamps T Lauriot B 《Journal of motor behavior》2003,35(2):151-170
The qualitative behavioral reorganizations that occurred during the acquisition of a complex motor skill were examined. Five novice participants practiced for 39 sessions of ten 1-min trials on a modified version of the ski-simulator. Analyses focused on the motion of the apparatus platform, modeled as a self-sustained oscillator. At the beginning of the experiment, all participants adopted a behavior that could be modeled with a highly nonlinear stiffness function and a Rayleigh damping function. The behavior in the final part of the experiment was captured by a qualitatively different model, with a linear stiffness function and a van der Pol damping behavior. The transition from the initial to the final model was gradual and was marked in most cases by an abrupt increase of oscillation frequency. During the transition stage, the 2 damping behaviors seemed alternately exploited within each trial. The results are discussed in the framework of the dynamical systems approach to motor coordination and learning, considering motor skill acquisition as a phase transition. 相似文献
248.
249.
The aim of the present experiment was to study the central control of posture and movement coordination. Subjects' task was voluntarily to raise their arms in response to a visual signal, this movement generating an unloading in which the weight of the load (0 gm, 1500 gm, 3000 gm, or 4500 gm) was known in advance. Thus, subjects could predict the postural perturbation generated by the unloading. Analysis showed an effect of the unloading conditions: in the 0-gm and 1500-gm conditions, reaction time (RT) was longer than in the 3000-gm and 4500-gm conditions. This decrease in RT was exclusively due to a reduction of the premotor time, confirming the posturokinetic coordination in the programming processes. The implications of the decrease in premotor time with the increase of the perturbation for the posture/movement coordination strategies are also discussed. 相似文献
250.
The present study examined the validity of a Spanish version of the Participation Motivation Inventory, modified for swimming by Gould, Feltz, and Weiss in 1985, and investigated whether young swimmers differing in sex and age vary in their objectives for participation. Swimmers (204 boys and 224 girls, ranging in age from 8 to 22 years) were administered the inventory. Factor analysis with varimax rotation identified seven factors fairly consistent with previous research. Differences were found across age and sex. Females placed greater emphasis than males on Friendship and Fun and indicated lower importance rating to Status. Younger children (8-10 years) rated Fun/Friendship, Competition/Skills, Significant Others, and Status significantly higher in importance than did the other age groups. 相似文献