全文获取类型
收费全文 | 5511篇 |
免费 | 292篇 |
国内免费 | 2篇 |
专业分类
5805篇 |
出版年
2023年 | 57篇 |
2022年 | 47篇 |
2021年 | 69篇 |
2020年 | 122篇 |
2019年 | 172篇 |
2018年 | 206篇 |
2017年 | 220篇 |
2016年 | 204篇 |
2015年 | 177篇 |
2014年 | 182篇 |
2013年 | 582篇 |
2012年 | 299篇 |
2011年 | 328篇 |
2010年 | 204篇 |
2009年 | 206篇 |
2008年 | 265篇 |
2007年 | 259篇 |
2006年 | 215篇 |
2005年 | 187篇 |
2004年 | 174篇 |
2003年 | 177篇 |
2002年 | 152篇 |
2001年 | 75篇 |
2000年 | 55篇 |
1999年 | 54篇 |
1998年 | 70篇 |
1997年 | 61篇 |
1996年 | 63篇 |
1995年 | 45篇 |
1994年 | 58篇 |
1993年 | 41篇 |
1992年 | 42篇 |
1991年 | 41篇 |
1990年 | 45篇 |
1989年 | 24篇 |
1988年 | 29篇 |
1987年 | 29篇 |
1986年 | 25篇 |
1985年 | 43篇 |
1984年 | 38篇 |
1982年 | 45篇 |
1981年 | 28篇 |
1980年 | 39篇 |
1979年 | 35篇 |
1978年 | 36篇 |
1977年 | 40篇 |
1976年 | 35篇 |
1975年 | 31篇 |
1974年 | 22篇 |
1973年 | 26篇 |
排序方式: 共有5805条查询结果,搜索用时 15 毫秒
971.
Polk JD Spencer-Smith J DiBerardino L Ellis D Downen M Rosengren KS 《Infant behavior & development》2008,31(2):302-306
We describe new Fourier- and shape-based methods for quantifying variation in phase-portraits, and re-analyze previously-published ontogenetic and adult data [Clark, J. E., & Phillips, S. J. (1993). A longitudinal study of intralimb coordination in the first year of independent walking: A dynamical systems approach. Child Development, 64, 1143–1157]. Results show considerable variation between individuals and through development, but after 6 months of walking some gait patterns stabilize. 相似文献
972.
Mirman D Magnuson JS 《Journal of experimental psychology. Learning, memory, and cognition》2008,34(1):65-79
The authors investigated semantic neighborhood density effects on visual word processing to examine the dynamics of activation and competition among semantic representations. Experiment 1 validated feature-based semantic representations as a basis for computing semantic neighborhood density and suggested that near and distant neighbors have opposite effects on word processing. Experiment 2 confirmed these results: Word processing was slower for dense near neighborhoods and faster for dense distant neighborhoods. Analysis of a computational model showed that attractor dynamics can produce this pattern of neighborhood effects. The authors argue for reconsideration of traditional models of neighborhood effects in terms of attractor dynamics, which allow both inhibitory and facilitative effects to emerge. 相似文献
973.
Couture M Lafond D Tremblay S 《Journal of experimental psychology. Learning, memory, and cognition》2008,34(3):524-532
In a serial recall task, the Hebb repetition effect occurs when recall performance improves for a sequence repeated throughout the experimental session. This phenomenon has been replicated many times. Nevertheless, such cumulative learning seldom leads to perfect recall of the whole sequence, and errors persist. Here the authors report evidence that there is another side to the Hebb repetition effect that involves learning errors produced in a repeated sequence. A learning measure based on past recalls (correct or incorrect) shows that the probability of a given response increases with the number of prior occurrences of that response. The pattern of results reveals another manifestation of the Hebb repetition effect and speaks to the nature of implicit learning. 相似文献
974.
Daniel C. Russell 《The Southern journal of philosophy》2008,46(2):299-315
Virtue ethicists sometimes say that a right action is what a virtuous person would do, characteristically, in the circumstances. But some have objected recently that right action cannot be defined as what a virtuous person would do in the circumstances because there are circumstances in which a right action is possible but in which no virtuous person would be found. This objection moves from the premise that a given person ought to do an action that no virtuous person would do, to the conclusion that the action is a right action. I demon‐strate that virtue ethicists distinguish “ought” from “right” and reject the assumption that “ought” implies “right.” I then show how their rejection of that assumption blocks this “right but not virtuous” objection. I conclude by showing how the thesis that “ought” does not imply “right” can clarify a further dispute in virtue ethics regarding whether “ought” implies “can.” 相似文献
975.
Daniel J. Whiting 《Philosophia》2008,36(3):375-388
According to inferential role semantics (IRS), for any given expression to possess a particular meaning one must be disposed
to make or, alternatively, acknowledge as correct certain inferential transitions involving it. As Williamson points out,
pejoratives such as ‘Boche’ seem to provide a counter-example to IRS. Many speakers are neither disposed to use such expressions
nor consider it proper to do so. But it does not follow, as IRS appears to entail, that such speakers do not understand pejoratives
or that they lack meaning. In this paper, I examine recent responses to this problem by Boghossian and Brandom and argue that
their proposed construal of the kind of inferential rules governing a pejorative such as ‘Boche’ is to be ruled out on the
grounds that it is non-conservative. I defend the appeal to conservatism in this instance against criticism and, in doing
so, propose an alternative approach to pejoratives on behalf of IRS that resolves the problem Williamson poses.
相似文献
Daniel J. WhitingEmail: |
976.
During source remembering, selectively emphasizing one source in the retrieval query “Is this item from Source A?” can yield different accuracy than emphasizing the alternate source in “Is this item from Source B?” even if those are the only two possible origins. One account of this cue-framing effect holds that it reflects different active monitoring strategies encouraged by the two cue frames. An item memory misattribution (IMM) model instead assumes that this effect reflects the uncontrolled use of item recognition during confirmatory source judgments, and an IMM model simulation predicted a quantitative relationship between recognition levels and the cue-framing effect. Experiments 1 and 3 confirmed these predictions by using study repetitions to manipulate recognition levels, and Experiments 2 and 3 also demonstrated the effect with new source tasks not previously considered. The data suggest that, in addition to qualitative monitoring strategies, subjects also use the availability of item memory in a heuristic fashion during confirmatory source attributions. 相似文献
977.
Connell A Bullock BM Dishion TJ Shaw D Wilson M Gardner F 《Journal of abnormal child psychology》2008,36(8):1211-1225
This study used latent transition analysis (LTA) to examine changes in early emotional and behavioral problems in children
age 2 to 4 years resulting from participation in a family-centered intervention. A sample of 731 economically disadvantaged
families was recruited from among participants in a national food supplement and nutrition program. Families with toddlers
between age 2 and 3 were randomized either to the Family Check-Up (FCU) or to a nonintervention control group. The FCU’s linked
interventions were tailored to each family’s needs. Assessments occurred at age 2, 3, and 4. The FCU followed age 2 and age
3 assessments. Latent class analyses were conducted on mother reports of behavior and emotional problems from age 2 to 4 to
study transitions among the following four groups: (a) externalizing only, (b) internalizing only, (c) comorbid internalizing
and externalizing, and (d) normative. LTA results revealed that participation in the FCU increased the likelihood of transitioning
from either the comorbid or the internalizing class into the normative class by age 4. These results suggest family interventions
in early childhood can potentially disrupt the early emergence of both emotional and behavioral problems. 相似文献
978.
Shiels K Hawk LW Lysczek CL Tannock R Pelham WE Spencer SV Gangloff BP Waschbusch DA 《Journal of abnormal child psychology》2008,36(6):903-913
Working memory is one of several putative core neurocognitive processes in attention-deficit/hyperactivity disorder (ADHD).
The present work seeks to determine whether visual–spatial working memory is sensitive to motivational incentives, a laboratory
analogue of behavioral treatment. Participants were 21 children (ages 7–10) with a diagnosis of ADHD-combined type. Participants
completed a computerized spatial span task designed to assess storage of visual–spatial information (forward span) and manipulation
of the stored information (backward span). The spatial span task was completed twice on the same day, once with a performance-based
incentive (trial-wise feedback and points redeemable for prizes) and once without incentives. Participants performed significantly
better on the backward span when rewarded for correct responses, compared to the no incentive condition. However, incentives
had no effect on performance during the forward span. These findings may suggest the use of motivational incentives improved
manipulation, but not storage, of visual–spatial information among children with ADHD. Possible explanations for the differential
incentive effects are discussed, including the possibility that incentives prevented a vigilance decrement as task difficulty
and time on task increased. 相似文献
979.
The present study examined relations among maternal psychological resources, rejecting parenting, and early adolescent antisocial
behavior in a sample of 231 low-income mothers and their sons with longitudinal assessments from age 18 months to 12 years.
The maternal resources examined were age at first birth, aggressive personality, and empathy. Each of the maternal resources
predicted rejecting parenting during early childhood in structural equation models that controlled for toddler difficult temperament,
and rejecting parenting in early childhood predicted antisocial behavior in early adolescence. Rejecting parenting accounted
for the indirect effect of each of the maternal resources on antisocial behavior, but a direct effect was also supported between
maternal aggressive personality and youth antisocial behavior. Results highlight the importance of these relatively understudied
maternal resources and have implications for prevention and intervention programs that focus on parenting during early childhood. 相似文献
980.
Forbes EE Shaw DS Silk JS Feng X Cohn JF Fox NA Kovacs M 《Journal of abnormal child psychology》2008,36(2):207-221
Although parents and children are thought to influence one another's affect and behavior, few studies have examined the direction of effects from children to parents, particularly with respect to parental psychopathology. We tested the hypothesis that children's affective characteristics are associated with the course of mothers' depressive symptoms. Children's affect expression was observed during a series of mother-child interaction tasks, and children's resting frontal electroencephalogram (EEG) asymmetry was assessed in a psychophysiology laboratory. Mothers' depressive symptoms were assessed at two time points, approximately one year apart, at the mother-child interaction visits. Depressive symptoms increased over time for mothers with a history of childhood-onset depression whose children exhibited right frontal EEG asymmetry. Depressive symptoms were associated with high child negative affect at both time points for mothers whose children exhibited right frontal EEG asymmetry. Cross-lagged models with a subset of participants provided some evidence of both parent-to-child and child-to-parent directions of effects. Findings suggest that akin to other interpersonal stressors, children's affective characteristics may contribute to maternal depressive symptoms. 相似文献