全文获取类型
收费全文 | 494篇 |
免费 | 34篇 |
国内免费 | 1篇 |
出版年
2024年 | 1篇 |
2023年 | 10篇 |
2022年 | 13篇 |
2021年 | 12篇 |
2020年 | 16篇 |
2019年 | 18篇 |
2018年 | 15篇 |
2017年 | 33篇 |
2016年 | 20篇 |
2015年 | 19篇 |
2014年 | 21篇 |
2013年 | 55篇 |
2012年 | 28篇 |
2011年 | 30篇 |
2010年 | 13篇 |
2009年 | 13篇 |
2008年 | 30篇 |
2007年 | 24篇 |
2006年 | 37篇 |
2005年 | 15篇 |
2004年 | 16篇 |
2003年 | 14篇 |
2002年 | 16篇 |
2001年 | 9篇 |
2000年 | 5篇 |
1999年 | 5篇 |
1998年 | 3篇 |
1997年 | 7篇 |
1996年 | 7篇 |
1995年 | 1篇 |
1994年 | 1篇 |
1993年 | 5篇 |
1992年 | 3篇 |
1991年 | 5篇 |
1990年 | 1篇 |
1989年 | 1篇 |
1985年 | 2篇 |
1982年 | 2篇 |
1979年 | 1篇 |
1977年 | 1篇 |
1971年 | 1篇 |
排序方式: 共有529条查询结果,搜索用时 15 毫秒
191.
The aim of the work is to provide a language to reason about Closed Interactions, i.e. all those situations in which the outcomes
of an interaction can be determined by the agents themselves and in which the environment cannot interfere with they are able
to determine. We will see that two different interpretations can be given of this restriction, both stemming from Pauly Representation
Theorem. We will identify such restrictions and axiomatize their logic. We will apply the formal tools to reason about games
and their regulation. 相似文献
192.
Roberto Sacchi Fabio Pupin Augusto Gentilli Diego Rubolini Stefano Scali Mauro Fasola Paolo Galeotti 《Aggressive behavior》2009,35(3):274-283
Theoretical models predict that the outcome of dyadic agonistic encounters between males is influenced by resource‐holding potential, resource value, and intrinsic aggressiveness of contestants. Moreover, in territorial disputes residents enjoy a further obvious competitive advantage from the residency itself, owing to the intimate familiarity with their territory. Costs of physical combats are, however, dramatically high in many instances. Thus, signals reliably reflecting fighting ability of the opponents could easily evolve in order to reduce these costs. For example, variation in color morph in polymorphic species has been associated with dominance in several case studies. In this study, we staged asymmetric resident‐intruder encounters in males of the common wall lizard Podarcis muralis, a species showing three discrete morphs (white, yellow, and red) to investigate the effects of asymmetries in color morph, residency, and size between contestants on the outcome of territorial contests. We collected aggression data by presenting each resident male with three intruders of different color morph, in three consecutive tests conducted in different days, and videotaping their interactions. The results showed that simple rules such as residency and body size differences could determine the outcome of agonistic interactions: residents were more aggressive than intruders, and larger males were competitively superior to smaller males. However, we did not find any effect of color on male aggression or fighting success, suggesting that color polymorphism in this species is not a signal of status or fighting ability in intermale conflicts. Aggr. Behav. 35:274–283, 2009. © 2009 Wiley‐Liss, Inc. 相似文献
193.
Ezequiel Di Paolo 《Topoi》2009,28(1):9-21
This paper reformulates some of the questions raised by extended mind theorists from an enactive, life/mind continuity perspective.
Because of its reliance on concepts such as autopoiesis, the enactive approach has been deemed internalist and thus incompatible
with the extended mind hypothesis. This paper answers this criticism by showing (1) that the relation between organism and
cogniser is not one of co-extension, (2) that cognition is a relational phenomenon and thereby has no location, and (3) that
the individuality of a cogniser is inevitably linked with the question of its autonomy, a question ignored by the extended
mind hypothesis but for which the enactive approach proposes a precise, operational, albeit non-functionalist answer. The
paper raises a pespective of embedded and intersecting forms of autonomous identity generation, some of which correspond to
the canonical cases discussed in the extended mind literature, but on the whole of wider generality. In addressing these issues,
this paper proposes unbiased, non-species specific definitions of cognition, agency and mediation, thus filling in gaps in
the extended mind debates that have led to paradoxical situations and a problematic over-reliance on intutions about what
counts as cognitive.
相似文献
Ezequiel Di PaoloEmail: |
194.
Paolo Vineis 《Theoretical medicine and bioethics》1991,12(2):171-181
Epidemiology relies upon a broad interpretation of determinism. This paper discusses analogies with the evolution of the concept of cause in physics, and analyzes the classical nine criteria proposed by Sir Austin Bradford Hill for causal assessment. Such criteria fall into the categories of enumerative induction, eliminative induction, deduction and analogy. All of these four categories are necessary for causal assessment and there is no natural hierarchy among them, although a deductive analysis of the study design is preliminary to any assessment. 相似文献
195.
Field T Hernandez-Reif M Diego M Figueiredo B Schanberg S Kuhn C 《Infant behavior & development》2006,29(2):268-275
Three hundred depressed pregnant women were recruited at approximately 20 weeks gestation. They were then divided by a median split into high and low urinary cortisol level groups. The high cortisol group had higher CES-D depression scores and higher inhibition (BIS) scores prenatally. Their fetuses had smaller head circumference, abdominal circumference, biparietal diameter and fetal weight. The high cortisol group neonates were shorter gestational age and lower birthweight and they had lower Brazelton habituation and higher Brazelton reflex scores. Discriminant function analyses suggested that cortisol levels more accurately classified short gestation and low birthweight groups than CES-D depression scores. 相似文献
196.
Three-month-old infants of depressed (n=16) and non-depressed mothers (n=16) were habituated to video clips of a female model reciting phrases while posing happy or sad facial/vocal expressions and dishabituated to the alternate expressions. Overall, infants of depressed mothers took longer to habituate the video clips compared to infants of non-depressed mothers, and those assigned to habituate the sad video clips displayed a novelty response or dishabituated to the happy expressions. These findings suggest that 3-month-old infants of depressed mothers discriminate sad from happy expressions, however, they do not appear to perceive sad expressions as novel. 相似文献
197.
Sixty-four neonates (M age=6.8 days) of depressed mothers who received moderate pressure massage versus light pressure massage therapy during pregnancy (month 5 through month 8) were compared on their behaviors during 15-min observations and on their performance on the Brazelton Neonatal Behavior Assessment Scale. The group of neonates whose mothers received moderate pressure massage spent a greater percent of the observation time smiling and vocalizing, and they received better scores on the orientation, motor, excitability, and depression clusters of the Brazelton scale. 相似文献
198.
Neonates born to depressed (n = 44) versus non-depressed (n = 43) mothers were compared on individual items of the Brazelton Neonatal Behavioral Assessment Scale (NBAS). The neonates of depressed mothers received lower scores on orienting to the live face/voice stimulus and on the alertness items, suggesting they were less attentive. They also scored less optimally on the cuddliness and hand-to-mouth activity items, suggesting they were more aroused. These data lend support to the model that infants of depressed mothers are more aroused and less attentive. 相似文献
199.
Prenatal paternal depression 总被引:2,自引:0,他引:2
Field T Diego M Hernandez-Reif M Figueiredo B Deeds O Contogeorgos J Ascencio A 《Infant behavior & development》2006,29(4):579-583
Prenatal depressive symptoms, anxiety, anger and daily hassles were investigated in 156 depressed and non-depressed pregnant women and their depressed and non-depressed partners (fathers-to-be). Depressed versus non-depressed fathers had higher depression, anxiety and daily hassles scores. Although the pregnant women in general had lower anxiety, anger and daily hassles scores than the men, the scores on the measures for depressed fathers and depressed mothers did not differ. Paternal depression appeared to have less effect than maternal depression on their partners’ scores. However, the similarity between the scores of depressed mothers and depressed fathers highlights the importance of screening for depression in fathers-to-be as well as mothers-to-be during pregnancy. 相似文献
200.
We evaluated the statistical power of single-indicator latent growth curve models (LGCMs) to detect correlated change between two variables (covariance of slopes) as a function of sample size, number of longitudinal measurement occasions, and reliability (measurement error variance). Power approximations following the method of Satorra and Saris (1985) were used to evaluate the power to detect slope covariances. Even with large samples (N = 500) and several longitudinal occasions (4 or 5), statistical power to detect covariance of slopes was moderate to low unless growth curve reliability at study onset was above .90. Studies using LGCMs may fail to detect slope correlations because of low power rather than a lack of relationship of change between variables. The present findings allow researchers to make more informed design decisions when planning a longitudinal study and aid in interpreting LGCM results regarding correlated interindividual differences in rates of development. 相似文献