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   20416篇
  免费   5篇
  20421篇
  2022年   5篇
  2021年   3篇
  2020年   9篇
  2019年   6篇
  2018年   3486篇
  2017年   2811篇
  2016年   2244篇
  2015年   189篇
  2014年   72篇
  2013年   65篇
  2012年   563篇
  2011年   2383篇
  2010年   2516篇
  2009年   1471篇
  2008年   1702篇
  2007年   2173篇
  2006年   22篇
  2005年   211篇
  2004年   165篇
  2003年   109篇
  2002年   59篇
  2001年   29篇
  2000年   50篇
  1999年   13篇
  1998年   23篇
  1997年   16篇
  1996年   8篇
  1994年   2篇
  1992年   1篇
  1991年   1篇
  1990年   9篇
  1980年   1篇
  1979年   1篇
  1978年   1篇
  1976年   1篇
  1969年   1篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
Although the association between deficits in effortful control and later externalizing behavior is well established, many researchers (Nigg Journal of Child Psychology and Psychiatry, 47(3-4), 395–422, 2006; Steinberg Developmental Review, 28(1), 78–106, 2008) have hypothesized this association is actually the product of the imbalance of dual systems, or two underlying traits: approach and self-regulation. Very little research, however, has deployed a statistically robust strategy to examine that compelling model; further, no research has done so using behavioral measures, particularly in longitudinal studies. We examined the imbalance of approach and self-regulation (effortful control, EC) as predicting externalizing problems. Latent trait models of approach and EC were derived from behavioral measures collected from 102 children in a community sample at 25, 38, 52, and 67 months (2 to 5 ½ years), and used to predict externalizing behaviors, modeled as a latent trait derived from parent-reported measures at 80, 100, 123, and 147 months (6 ½ to 12 years). The imbalance hypothesis was supported: Children with an imbalance of approach and EC had more externalizing behavior problems in middle childhood and early preadolescence, relative to children with equal levels of the two traits.  相似文献   
992.
993.
This study tests a biosocial model of the link between testosterone and proactive-reactive aggression in youth at varying levels of harsh discipline. Given that proactive aggression is used to gain power and status and the importance of social learning in its formation, we hypothesized that testosterone would be associated with proactive aggression at higher levels of harsh discipline, and that this relationship would be more pronounced in boys than girls. Participants (n?=?445; 50% male; M age?=?11.92 years; 80% African-American) and their caregivers completed questionnaires including demographics, conflict tactics, and proactive-reactive aggression. Youth also provided a saliva sample for testosterone. Analyses revealed an interaction between testosterone and harsh discipline on proactive aggression in both boys and girls, and an interaction between testosterone and harsh discipline on reactive aggression in boys only. For those experiencing high levels of harsh discipline, testosterone was positively associated with proactive aggression, with the magnitude of the association increasing as harsh discipline increased. For below average levels of harsh discipline, there were protective effects of high testosterone for boy’s reactive aggression and for girl’s proactive aggression. The findings support basic tenets of the biosocial model which suggest that links between testosterone and aggressive behavior are dependent on contextual forces, highlighting the complex relationship between hormones, social context, and aggression. Novel findings include protective effects of high testosterone for those exposed to low levels of harsh discipline. Findings are discussed in light of the context-contingency effect and also within the differential susceptibility framework.  相似文献   
994.
Exaggerated attention to threatening information, or the threat bias, has been implicated in the development and maintenance of anxiety disorders. Recent research has highlighted methodological limitations in threat bias measures, such as temporal insensitivity, leading to the development of novel metrics that capture change and variability in threat bias over time. These metrics, however, have rarely been examined in non-clinical samples. The present study aimed to explore the utility of these trial-level metrics in predicting anxiety-related stress reactivity (stress-induced negative mood state) in trait anxious adults (N?=?52). Following a stressor, participants completed the dot probe task to generate threat bias scores. Stress reactivity was measured via stress-induced changes in subjective mood state. More variability in trial-level bias scores (TL-BSs) and greater bias away from threat (both mean and peak negative TL-BSs) predicted increased stress reactivity. The temporal characteristics of threat bias and implications for clinically-relevant measurement are discussed.  相似文献   
995.
Little is known about the contextual antecedents and consequences of children’s academic coping. One hundred and eighty-three-sixth grade students participated in a study that examined a process model whereby children’s perceptions of parent and teacher behaviors were associated with children’s coping strategies through children’s appraisals of failure. It also examined whether these coping strategies were then associated with students’ classroom engagement. Results revealed that parent autonomy support was indirectly associated with defensive coping through its effects on children’s appraisals of failure. There was also some support that cognitive appraisals, particularly threat appraisals were indirectly associated with child reported engagement through coping, suggesting that coping appraisals impact children’s engagement and participation in the classroom through their effects on coping behavior/strategy use. The findings underscore the importance of parent autonomy support for children’s appraisals of failure, coping, and engagement.  相似文献   
996.
Despite the automaticity of affective sharing, many studies have documented the role of top-down effects, such as social categorization, on people’s empathic responses. An important question, largely ignored in previous research, concerns empathy to ingroup and outgroup members’ pain in the contexts of ongoing intergroup conflict. In the present study we examined how implicit and explicit ethnic social categorization of others affects empathy to pain in the context of the Israeli–Palestinian conflict. To meet this aim, we assessed the evaluation of pain by Jewish and Arab participants who viewed a series of visual stimuli depicting painful and non-painful familiar situations. The stimuli were associated with explicitly or implicitly primed typical names depicting ingroup, neutral outgroup, and adversary outgroup members. Results demonstrate that pain ratings in the explicit priming condition provide support for the ingroup empathy hypothesis, positing that empathy is higher for ingroup than for outgroup members for both Jews and Palestinian Arabs. Conversely, when the targets’ categories are primed implicitly, results revealed difference in empathy by the two ethnic groups where an ingroup bias was detected only for Palestinian Arabs. This suggests that the activation of ingroup bias on the subliminal implicit level among Palestinian Arab participants might be mediated by the amount of conflict permeating in their daily lives and by deeply rooted cultural values and behavioural patterns.  相似文献   
997.
Elementary school is as much about developing attitudes as competence. With this fact in mind, the Japanese national government established a plan to enhance elementary school students’ motivation for learning English. The success of this program has, however, not been empirically tested. This study aimed to assess the longitudinal, discrete development of Japanese elementary school students’ motivation for learning English as a foreign language. A cohort of 513 Japanese elementary students participated in the study across 2 years of school. Students responded to surveys regarding the quality of their motivation at three time points, and their engagement at two time points. Latent profile analysis followed by latent profile transition analysis was used to assess the sample for latent subgroups. With subgroups established at three time points, a Mover–Stayer model was tested to estimate the movement of students among the subgroups across three time points and 2 years of elementary school education. Three theoretically consistent latent subgroups were observed at each of the time points. Based on theory and past empirical research, the subgroups (presented from least to most adaptive) were labeled: Poor Quality, High Quantity, and Good Quality. Across the three measurements, an overall shift of students to higher quantity and quality motivational subgroups was observed. This study provides evidence that the low-stakes, high-interest approach currently undertaken may have the desired effect of improving students’ motivation to learn across 2 years of schooling. Implications for both practice and national policy are discussed.  相似文献   
998.
Not all exercisers experience the same psychological benefits. The understanding of motivational processes and their relation with emotional consequences of exercise should be considered in the context of the exercisers motivation. This was a cross-sectional study of 153 gym users (M?=?36.21 years, SD?=?8.44; 44.9% men, 55.1% women; M years exercise?=?8). Weekly attendance averaged 4.3 (SD?=?2.6) sessions per week; reported exertion intensity was 5.6 (SD?=?2.1) (scale: 0–11). The basic psychological needs (BPNs) posited by self-determination theory, motivational regulation, and emotional response to physical activity, were measured. Possible mediators of BPN-emotion relationships were analyzed. BPN satisfaction was associated with a positive emotional response to exercise which was partially mediated by the effect of autonomous regulation on positive activation and psychological well-being. Mediation models indicated that the negative effects of BPN frustration were counteracted by autonomous regulation. Exercise professionals should be able to create psychologically supportive contexts and identify behaviors associated with need frustration so as to enhance emotional responses to exercise.  相似文献   
999.
Theories of boredom assert that boredom is a product of situational meaninglessness. We conducted two studies to test if the perceived meaningfulness of a situation is associated with state boredom, above and beyond sadness, personality traits, and boredom proneness. In Study 1, 105 participants (72.4% female: mean age?=?33.9 years, SD?=?17.5) described situations in which they experienced boredom, no boredom, engagement, or sadness. They then rated the level of state boredom, sadness, and meaninglessness that they experienced in that situation. As hypothesized, state boredom was associated with situational meaninglessness, before and after controlling for sadness. In Study 2, 148 participants (73.0% female; mean age?=?19.2 years, SD?=?1.8) first provided baseline data on personality traits and boredom proneness. Through a smartphone app-based experience-sampling method, they then responded to a brief questionnaire multiple times a day, across 7 days. The questionnaire asked about the nature of their current activity, whether the activity was done alone or with other people, and their affective state. Results from multilevel modelling of 3022 entries suggest that perceived meaningfulness of the activity was negatively associated with state boredom, above and beyond sadness, personality, and boredom proneness. We also found that being with others during the activity acted as a moderator; activities lower in perceived meaningfulness were associated with higher ratings of state boredom when done with others than when done alone. These results demonstrate that perceptions of meaninglessness characterize state boredom.  相似文献   
1000.
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