全文获取类型
收费全文 | 3510篇 |
免费 | 160篇 |
国内免费 | 2篇 |
专业分类
3672篇 |
出版年
2023年 | 44篇 |
2022年 | 47篇 |
2021年 | 62篇 |
2020年 | 99篇 |
2019年 | 78篇 |
2018年 | 141篇 |
2017年 | 142篇 |
2016年 | 137篇 |
2015年 | 112篇 |
2014年 | 124篇 |
2013年 | 397篇 |
2012年 | 221篇 |
2011年 | 187篇 |
2010年 | 123篇 |
2009年 | 132篇 |
2008年 | 159篇 |
2007年 | 162篇 |
2006年 | 109篇 |
2005年 | 97篇 |
2004年 | 88篇 |
2003年 | 84篇 |
2002年 | 71篇 |
2001年 | 74篇 |
2000年 | 65篇 |
1999年 | 51篇 |
1998年 | 31篇 |
1997年 | 24篇 |
1996年 | 21篇 |
1995年 | 17篇 |
1994年 | 13篇 |
1993年 | 14篇 |
1992年 | 19篇 |
1991年 | 19篇 |
1990年 | 32篇 |
1989年 | 29篇 |
1988年 | 20篇 |
1987年 | 27篇 |
1986年 | 24篇 |
1985年 | 22篇 |
1984年 | 24篇 |
1983年 | 17篇 |
1979年 | 29篇 |
1976年 | 14篇 |
1975年 | 20篇 |
1974年 | 23篇 |
1973年 | 18篇 |
1972年 | 14篇 |
1971年 | 16篇 |
1970年 | 19篇 |
1968年 | 18篇 |
排序方式: 共有3672条查询结果,搜索用时 0 毫秒
191.
Electroencephalographic recordings (EEG) were used to assess age-associated differences in nonlinear brain dynamics during both rest and auditory oddball performance in children aged 9.0-12.8 years, younger adults, and older adults. We computed nonlinear coupling dynamics and dimensional complexity, and also determined spectral alpha power as an indicator of cortical reactivity. During rest, both nonlinear coupling and spectral alpha power decreased with age, whereas dimensional complexity increased. In contrast, when attending to the deviant stimulus, nonlinear coupling increased with age, and complexity decreased. Correlational analyses showed that nonlinear measures assessed during auditory oddball performance were reliably related to an independently assessed measure of perceptual speed. We conclude that cortical dynamics during rest and stimulus processing undergo substantial reorganization from childhood to old age, and propose that lifespan age differences in nonlinear dynamics during stimulus processing reflect lifespan changes in the functional organization of neuronal cell assemblies. 相似文献
192.
Previous research has shown that a considerable number of primates can remember the location and fruiting state of individual
trees in their home range. This enables them to relocate fruit or predict whether previously encountered fruit has ripened.
Recent studies, however, suggest that the ability of primates to cognitively map fruit-bearing trees is limited. In this study,
we investigated an alternative and arguably simpler, more efficient strategy, the use of synchrony, a botanical characteristic
of a large number of fruit species. Synchronous fruiting would allow the prediction of the fruiting state of a large number
of trees without having to first check the trees. We studied whether rainforest primates, grey-cheeked mangabeys in the Kibale
National Park, Uganda, used synchrony in fruit emergence to find fruit. We analysed the movements of adult males towards Uvariopsis congensis food trees, a strongly synchronous fruiting species with different local patterns of synchrony. Monkeys approached within
crown distance, entered and inspected significantly more Uvariopsis trees when the percentage of trees with ripe fruit was high compared to when it was low. Since the effect was also found
for empty trees, the monkeys likely followed a synchrony-based inspection strategy. We found no indication that the monkeys
generalised this strategy to all Uvariopsis trees within their home range. Instead, they attended to fruiting peaks in local areas within the home range and adjusted
their inspective behaviour accordingly revealing that non-human primates use botanical knowledge in a flexible way. 相似文献
193.
Müller U Liebermann-Finestone DP Carpendale JI Hammond SI Bibok MB 《Journal of experimental child psychology》2012,111(2):331-348
This longitudinal study examined the concurrent and predictive relations between executive function (EF) and theory of mind (ToM) in 82 preschoolers who were assessed when they were 2, 3, and 4 years old. The results showed that the concurrent relation between EF and ToM, after controlling for age, verbal ability, and sex, was significant at 3 and 4 years of age but not at 2 years of age. Hierarchical regression analyses showed that EF at age 2 significantly predicted ToM at age 3 and that EF at age 3 significantly predicted ToM at age 4, over and above the effects of age, verbal ability, and prior performance on ToM tasks. However, ToM at ages 2 and 3 did not explain a significant amount of variance in EF at age 4. Bootstrap procedures revealed that verbal ability at age 3 fully mediated the relation between ToM at age 2 and EF at age 4. 相似文献
194.
Gül Günaydin Vivian Zayas Emre Selcuk Cindy Hazan 《Journal of experimental social psychology》2012,48(1):350-353
Does a new person's objective facial resemblance to a significant other influence snap judgments of liking, and if so, does this effect occur even when individuals are not consciously aware of the resemblance? Participants (romantic couples) made trait judgments about 24 novel faces, each shown for 500 ms. Objective facial resemblance was manipulated using morphing techniques such that half of the novel faces resembled participants' partner and half did not. We found that women's evaluations of novel men who resembled their partner (vs. those who did not) were more positive, but men's evaluations of novel women were not appreciably affected by facial resemblance. These results held even when individuals were not consciously aware of the resemblance. Moreover, the effect of facial resemblance on judgments of liking was more pronounced for individuals who were more satisfied in their relationship, suggesting that these results were due to activating the specific partner representation (rather than familiarity). This research shows that objective facial resemblance to a significant other influences snap judgments of liking automatically, effortlessly, and without conscious awareness. 相似文献
195.
The post-high school transition period is believed to be associated with considerable changes in social networks, yet longitudinal studies documenting these changes are scarce. To address this gap, the current research explored 3 relevant issues. First, changes in participants' relationship characteristics during the transition from high school were examined. Second, the roles of personality traits as antecedents of these changes were studied. Third, the association between change in relationship characteristics and personality during the transition was explored. A sample of over 2,000 German emerging adults, surveyed before leaving school and then 2 years after the transition from high school, was assessed on personality traits and a multidimensional assessment of the quality of their relationships. Findings indicated that participants experienced mostly positive changes in relationship quality during the transition from high school and that antecedent personality at school was an important predictor of the nature of this change. Finally, change in relationship quality was found to be associated with personality change during the post-school transition. Findings indicated that personality traits may influence transition success and that change in relationships during this transition may influence personality development. The implications of the research for post-school transition success are discussed. 相似文献
196.
Nilüfer Aydin Joachim I. Krueger Julia Fischer Dana Hahn Andreas Kastenmüller Dieter Frey Peter Fischer 《Journal of experimental social psychology》2012,48(1):446-449
A substantial amount of research shows that social exclusion is a threat to mental health. In the research reported here, we tested the hypothesis that the presence of a companion animal can serve as a buffer against these adverse effects. In a controlled laboratory experiment, we found that only socially excluded participants who did not work in the presence of a dog reported lower mental well-being compared with socially excluded participants who performed in the presence of a dog and participants who were not socially excluded. The theoretical and practical implications of these findings are discussed. 相似文献
197.
The aim of the present study was to examine if coping strategies mediate dispositional optimism-posttraumatic growth relation in postoperative breast cancer patients. The data were collected from 90 patients in two hospitals. Regression analyses revealed that problem-focused coping fully mediated dispositional optimism-posttraumatic growth relation, but emotion-focused coping did not. That is, postoperative breast cancer patients who were optimistic were more likely to use problem-focused coping strategies that, in turn, led to the development of posttraumatic growth. The findings were congruent with the literature in which problem-focused coping was mostly highlighted as compared to emotion-focused coping, and in which optimism and problem-focused coping relationship was emphasized in the path of posttraumatic growth. 相似文献
198.
The association of characteristics of anthropometry, training, and previous experience with race time in 84 recreational, long-distance, inline skaters at the longest inline marathon in Europe (111 km), the Inline One-eleven in Switzerland, was investigated to identify predictor variables for performance. Age, duration per training unit, and personal best time were the only three variables related to race time in a multiple regression, while none of the 16 anthropometric variables were related. Anthropometric characteristics seem to be of no importance for a fast race time in a long-distance inline skating race in contrast to training volume and previous experience, when controlled with covariates. Improving performance in a long-distance inline skating race might be related to a high training volume and previous race experience. Also, doing such a race requires a parallel psychological effort, mental stamina, focus, and persistence. This may be reflected in the preparation and training for the event. Future studies should investigate what motivates these athletes to train and compete. 相似文献
199.
200.
Tobias Greitemeyer Peter Fischer Andreas Kastenmüller 《European journal of social psychology》2012,42(4):462-469
After making a preliminary decision, a balanced search for information that is consistent and inconsistent with one's decision is associated with effective decision making. However, whereas searching for information that is inconsistent with one's preliminary preference arouses the aversive motivational state of cognitive dissonance, evokes negative emotions, and threatens the self, preference‐consistent information reduces dissonance, evokes positive emotions, and has positive implications for the self. Thus, searching for information in a balanced way requires the willingness to face the negative implications of searching for preference‐inconsistent (relative to preference‐consistent) information. Social exclusion has been shown to be associated with impulsive, undercontrolled behavior. Therefore, we expected socially excluded (relative to included or control) participants to be less willing to confront oneself with the unappealing qualities of preference‐inconsistent information and more willing to seek for the appealing qualities of preference‐consistent information. This hypothesis was supported in two studies, with the use of different manipulations of social exclusion. Copyright © 2012 John Wiley & Sons, Ltd. 相似文献