全文获取类型
收费全文 | 3607篇 |
免费 | 231篇 |
出版年
2023年 | 33篇 |
2022年 | 51篇 |
2021年 | 87篇 |
2020年 | 123篇 |
2019年 | 149篇 |
2018年 | 203篇 |
2017年 | 195篇 |
2016年 | 177篇 |
2015年 | 140篇 |
2014年 | 135篇 |
2013年 | 401篇 |
2012年 | 233篇 |
2011年 | 227篇 |
2010年 | 125篇 |
2009年 | 133篇 |
2008年 | 171篇 |
2007年 | 176篇 |
2006年 | 144篇 |
2005年 | 122篇 |
2004年 | 113篇 |
2003年 | 87篇 |
2002年 | 77篇 |
2001年 | 40篇 |
2000年 | 23篇 |
1999年 | 28篇 |
1998年 | 31篇 |
1997年 | 24篇 |
1996年 | 21篇 |
1995年 | 18篇 |
1994年 | 20篇 |
1993年 | 21篇 |
1992年 | 16篇 |
1991年 | 17篇 |
1990年 | 19篇 |
1989年 | 17篇 |
1988年 | 15篇 |
1987年 | 13篇 |
1986年 | 13篇 |
1985年 | 19篇 |
1984年 | 20篇 |
1983年 | 10篇 |
1982年 | 24篇 |
1981年 | 8篇 |
1980年 | 21篇 |
1979年 | 16篇 |
1978年 | 13篇 |
1977年 | 8篇 |
1976年 | 10篇 |
1975年 | 9篇 |
1974年 | 13篇 |
排序方式: 共有3838条查询结果,搜索用时 15 毫秒
961.
962.
Theresa Teslovich Martijn Mulder Nicholas T. Franklin Erika J. Ruberry Alex Millner Leah H. Somerville Patrick Simen Sarah Durston B. J. Casey 《Developmental science》2014,17(1):59-70
Adolescent decision‐making has been described as impulsive and suboptimal in the presence of incentives. In this study we examined the neural substrates of adolescent decision‐making using a perceptual discrimination task for which small and large rewards were associated with correctly detecting the direction of motion of a cloud of moving dots. Adults showed a reward bias of faster reaction times on trials for which the direction of motion was associated with a large reward. Adolescents, in contrast, were slower to make decisions on trials associated with large rewards. This behavioral pattern in adolescents was paralleled by greater recruitment of fronto‐parietal regions important in representing the accumulation of evidence sufficient for selecting one choice over its alternative and the certainty of that choice. The findings suggest that when large incentives are dependent on performance, adolescents may require more evidence to accumulate prior to responding, to be certain to maximize their gains. Adults, in contrast, appear to be quicker in evaluating the evidence for a decision when primed by rewards. Overall these findings suggest that rather than reacting hastily, adolescents can be incentivized to take more time to make decisions when large rewards are at stake. A video abstract of this article can be viewed at http://youtu.be/1g4F5vzFDl0 相似文献
963.
964.
Darby Proctor Rebecca A. Williamson Robert D. Latzman Frans B. M. de Waal Sarah F. Brosnan 《Animal cognition》2014,17(4):983-995
Humans will, at times, act against their own economic self-interest, for example, in gambling situations. To explore the evolutionary roots of this behavior, we modified a traditional human gambling task, the Iowa Gambling Task (IGT), for use with chimpanzees, capuchin monkeys and humans. We expanded the traditional task to include two additional payoff structures to fully elucidate the ways in which these primate species respond to differing reward distributions versus overall quantities of rewards, a component often missing in the existing literature. We found that while all three species respond as typical humans do in the standard IGT payoff structure, species and individual differences emerge in our new payoff structures. Specifically, when variance avoidance and reward maximization conflicted, roughly equivalent numbers of apes maximized their rewards and avoided variance, indicating that the traditional payoff structure of the IGT is insufficient to disentangle these competing strategies. Capuchin monkeys showed little consistency in their choices. To determine whether this was a true species difference or an effect of task presentation, we replicated the experiment but increased the intertrial interval. In this case, several capuchin monkeys followed a reward maximization strategy, while chimpanzees retained the same strategy they had used previously. This suggests that individual differences in strategies for interacting with variance and reward maximization are present in apes, but not in capuchin monkeys. The primate gambling task presented here is a useful methodology for disentangling strategies of variance avoidance and reward maximization. 相似文献
965.
Richard M. Sword Rosemary K. M. Sword Sarah R. Brunskill Philip G. Zimbardo 《Journal of Loss and Trauma》2014,19(3):197-201
Time perspective therapy (TPT) is a new time-based therapy that focuses on clients' perceptions of their past, present, and future. Based on Zimbardo's temporal theory and the utilization of the Zimbardo Time Perspective Inventory, the authors have developed this new narrative therapy approach for the purpose of treating clients diagnosed with posttraumatic stress disorder. The goal of TPT is to identify clients' six time perspective factors and then work with and balance these perspectives to promote a more positive future orientation, replace their traumatic past negativity, and thereby create a more responsive and healthier individual. 相似文献
966.
When stockouts restrict consumers' freedoms, two independent responses can occur: product desirability, or a reactance-based increase in the desire for the unavailable option, and source negativity, or general frustration with the source of the restriction. In four studies, we provide a novel investigation of consumer responses to stockout-restoration and examine how these two forces combine to affect consumer responses after freedoms are restored. To do so, we investigate two moderators that influence the activation and strength of product desirability and source negativity, respectively: trait reactance and attributions. While all consumers experience source negativity in response to stockouts, only consumers high in reactance experience product desirability, leading to differential responses to stockout-restoration. Compared to an in-stock condition, high reactance consumers respond positively to stockout-restoration, while low reactance consumers respond negatively to stockout-restoration, in terms of store and product evaluations and store choice. However, when high reactants attribute a stockout to the store, thereby increasing source negativity relative to product desirability, they respond negatively to stockout-restoration. 相似文献
967.
Melissa Noke Alison Wearden Sarah Peters Fiona Ulph 《Journal of genetic counseling》2014,23(5):701-707
International carrier testing guidelines discourage testing in childhood to preserve autonomous decision making and prevent detrimental psychosocial consequences. Despite the discouragement of autosomal recessive carrier testing during childhood, some sickle cell disease (SCD) or cystic fibrosis (CF) carriers are incidentally identified through UK and international newborn screening (NBS). This creates a scenario where parents may have knowledge of their newborn’s, but not older child’s carrier status. In addition, there is wide variation in the identification of CF and SCD carriers due to the screening technologies implemented by different NBS programs. The current and future availability of childhood testing are determined to some extent by the impact of testing on children and parents (whether this is beneficial or detrimental to wellbeing). However empirical research informing carrier guidance and practice is conflicting. Echoing previous calls, this discussion highlights the need for further qualitative and longitudinal research with children to consider the psychosocial impact of carrier testing on children and role of disclosure from parents on adaptation to results. It is recommended that professionals aim to minimize harms resulting from carrier identification by providing support for parents and children following NBS. Support for non-genetics specialists from genetic counselors to enable discussion of carrier results with children is suggested. 相似文献
968.
Karl Titze Sarah Schenck Marina Zulauf Logoz Ulrike Lehmkuhl 《Journal of child and family studies》2014,23(5):917-933
The ChiP-C is a clinically oriented questionnaire for assessing the quality of the child-parent relationship according to the child’s subjective appraisal. The ChiP-C is based on family systems theory and a cumulative vulnerability model. The questionnaire consists of 36 items representing three resource scales, five risk scales, and one additional scale. This article presents the theoretical framework and main psychometric properties of the ChiP-C. A school-based sample of 1,377 youth (ages 10–20; M = 14.4) and a clinic-referred consecutive sample of 197 patients (ages 10–18, M = 14.0) were surveyed. Construct validity was determined by confirmatory factor analyses. The mean of the internal consistencies was 0.79. Systematic correlations between the ChiP-C scales and the German EMBU confirmed the convergent and discriminant validity of the ChiP-C. Moreover, all ChiP-C scales were shown to be significantly correlated with psychopathological symptoms as measured by parent and youth questionnaires. The ChiP-C can be considered an economical screening instrument for a reliable and valid assessment of strengths and disturbances of the child-parent relationship according to the child’s subjective appraisal. 相似文献
969.
Kimberly R. Zlomke Dustin Lamport Sarah Bauman Beth Garland Brett Talbot 《Journal of child and family studies》2014,23(8):1484-1490
The Alabama Parenting Questionnaire (APQ) is a well studied assessment of parenting practices for school-age children, especially in relation to child externalizing behaviors. Given the developmental changes between school-age children and adolescents and subsequent changes to parenting approaches during that time, the utility of a public-accessed measure to span across a broad age range is of high clinical and empirical importance. This study investigated the psychometric properties of the APQ in a community sample of 376 parents of adolescents. In an Exploratory Factor Analysis the data suggested a 4-factor solution similar in composition to the original 5-factor model. Proposed factors for the APQ when given to parents of adolescents included Positive and Involved Parenting, Parental Monitoring, Discipline Practices, and Discipline Process. 相似文献
970.
Sarah M. Shuwairi Rebecca Bainbridge Gregory L. Murphy 《Attention, perception & psychophysics》2014,76(6):1789-1802
Impossible figures are striking examples of inconsistencies between global and local perceptual structures, in which the overall spatial configuration of the depicted image does not yield a coherent three-dimensional object. In order to investigate whether structural “impossibility” is an important perceptual property of depicted objects, we used a category formation task in which subjects were asked to divide pictures of shapes into groups that seemed most natural to them. Category formation is usually unidimensional, such that sorting is dominated by a single perceptual property, so this task can serve as a measure of which dimensions are most salient. In Experiment 1, subjects received sets of 12 line drawings consisting of six possible and six impossible objects. Very few subjects grouped the figures by impossibility on the first try, and only half did so after multiple attempts at sorting. In Experiment 2, we investigated other global properties of figures: symmetry and complexity. Subjects readily sorted objects by complexity, but seldom by symmetry. In Experiment 3, subjects were asked to draw each of the figures before sorting them, which had only a minimal effect on categorization. Finally, in Experiment 4, subjects were explicitly instructed to divide the shapes by symmetry or impossibility. Performance on this task was perfect for symmetry, but not for impossibility. Although global properties of figures seem extremely important to our perception, the results suggest that some of these cues are not immediately obvious or salient for most observers. 相似文献