全文获取类型
收费全文 | 3406篇 |
免费 | 201篇 |
专业分类
3607篇 |
出版年
2023年 | 25篇 |
2022年 | 56篇 |
2021年 | 58篇 |
2020年 | 107篇 |
2019年 | 83篇 |
2018年 | 170篇 |
2017年 | 163篇 |
2016年 | 176篇 |
2015年 | 136篇 |
2014年 | 164篇 |
2013年 | 486篇 |
2012年 | 183篇 |
2011年 | 180篇 |
2010年 | 109篇 |
2009年 | 127篇 |
2008年 | 149篇 |
2007年 | 150篇 |
2006年 | 114篇 |
2005年 | 88篇 |
2004年 | 91篇 |
2003年 | 101篇 |
2002年 | 66篇 |
2001年 | 45篇 |
2000年 | 74篇 |
1999年 | 45篇 |
1998年 | 28篇 |
1997年 | 25篇 |
1996年 | 25篇 |
1995年 | 15篇 |
1994年 | 19篇 |
1993年 | 18篇 |
1992年 | 20篇 |
1991年 | 16篇 |
1990年 | 15篇 |
1989年 | 12篇 |
1987年 | 11篇 |
1984年 | 14篇 |
1983年 | 10篇 |
1982年 | 14篇 |
1981年 | 9篇 |
1980年 | 10篇 |
1979年 | 13篇 |
1977年 | 11篇 |
1975年 | 10篇 |
1974年 | 9篇 |
1972年 | 12篇 |
1971年 | 13篇 |
1970年 | 14篇 |
1967年 | 11篇 |
1966年 | 8篇 |
排序方式: 共有3607条查询结果,搜索用时 0 毫秒
841.
Selectively retrieving a subset of previously studied material can cause forgetting of the unpracticed material. Such retrieval-induced forgetting is attributed to an inhibitory mechanism recruited to resolve interference among competing items. According to the inhibition-deficit hypothesis, older people experience a specific decline in inhibitory function and thus should show reduced retrieval-induced forgetting. However, the results of the two experiments reported here show the same amount of retrieval-induced forgetting in younger and older adults. These results indicate that retrieval inhibition is intact in older adults' episodic recall. The findings suggest that the common view of a general inhibitory deficit in older adults needs to be updated and that older adults show intact inhibition in some cognitive tasks and deficient inhibition in others. 相似文献
842.
Anita Böcker Dietrich Thränhardt 《Journal of International Migration and Integration》2006,7(1):71-94
In many countries the trend has been toward greater acceptance of multiple citizenship and more naturalizations of immigrants. This article analyses and compares developments in Germany and the Netherlands. Central questions are how policies toward dual citizenship have developed and to what extent these policies have influenced naturalization rates. The far-reaching toleration of dual citizenship in the Netherlands in the 1990s resulted in high naturalization rates. However, there were large differences between immigrant groups. Similar differences are found in Germany. Multiple citizenship carries little importance for European Union (EU) citizens, who feel no need to naturalize, and for refugees, who have no desire to retain the citizenship of their country of origin. 相似文献
843.
Therapeutic factors in an inpatient group from Turkey are presented. A total of 40 patients were seen over a period of 2 years and each patient was given Yalom's (1983) 60-item therapeutic factor list on discharge. The first four most valued therapeutic factor groups were Catharsis, Existential Factors, Cohesiveness and Hope. There were significant differences in the highly valued factors in different diagnostic groups. Patients with diagnoses of anxiety/somatization and borderline/identity problem preferred factors resembling those in many out-patient studies. The results are discussed in the light of relevant literature. 相似文献
844.
Decentralized punishment can maintain contributions to a public good at a high level. This positive effect holds even for situations involving inequality in punishment power, meaning that the relative costs for punishment differ between persons. We extend this line of research by examining the additional influence of instability of and thus potential competition for punishment power in public good experiments. As in previous research, inequality is operationalized by assigning the role of a ‘strong player’ to one group member, who can punish others at a reduced cost compared to other players. Instability is operationalized by the fact that the role assignment can change across rounds and is contingent on behavior in previous rounds. Three experiments show that under unequal, unstable (punishment‐) power, individuals behave more competitively and engage in a race for power resulting in detrimental effects for the group. Specifically, we find that (i) unstable power goes along with a disproportionate use of punishment; (ii) not inequality by itself but rather the combination of instability and inequality causes this effect; and (iii) this excessive use of punishment is found not only when the role of the strong player is assigned to individuals who previously behaved rather selfishly but also when prosocial behavior leads to the top, speaking for a generalizability of our findings. Implications for organizational settings are discussed. Copyright © 2016 John Wiley & Sons, Ltd. 相似文献
845.
Kateryna Savelieva Laura Pulkki-Råback Markus Jokela Mirka Hintsanen Päivi Merjonen Nina Hutri-Kähönen Markus Juonala Jorma Viikari Olli Raitakari Liisa Keltikangas-Järvinen 《Journal of child and family studies》2017,26(8):2191-2201
Intergenerational continuity in parenting quality has been demonstrated but the mechanisms underlying this continuity are less understood. This study investigated whether the offspring personality and years of education mediate the continuity in qualities of the parent–child relationship and whether offspring personality moderates this association. The sample comprised 1308 Finnish offspring (G2; 62% female) and their mothers (G1). G1 (Mean age?=?37.7) reported self-perceived qualities of the parent–child relationship in terms of emotional warmth and acceptance towards G2 aged 3–18 years in 1980. Thirty-two years later, once having become parents themselves, G2 (Mean age?=?42.9) self-rated their own qualities of the parent–child relationship towards their children using the same scales. Between these follow-ups, G2 self-rated their personality (consisting of temperament and character traits) using the Temperament and Character Inventory and reported years of education. Results indicated that G2 character traits—Self-directedness and Cooperativeness—partially mediated the intergenerational continuity in self-perceived emotional warmth and explained 16% of this association. No mediating role of G2 temperament traits was found (all ps?>?.240). Character traits accounted for the indirect association better than education in a multiple mediator model. Moreover, no moderating role of either temperament or character traits was found (all ps?≥?.064). Study findings show that warm and accepting qualities of the parent–child relationship in childhood are related to offspring character traits that reflect personality maturity in adulthood, which in turn would predict their own positive parent–child relationship later in life. 相似文献
846.
Working memory and attention are still impaired after three years in patients with stress‐related exhaustion 下载免费PDF全文
Ingibjörg H. Jonsdottir Arto Nordlund Susanne Ellbin Thomas Ljung Kristina Glise Peter Währborg Anna Sjörs Anders Wallin 《Scandinavian journal of psychology》2017,58(6):504-509
Cognitive impairment is one of the most pronounced symptoms reported by patients with stress‐related mental health problems. Impairments related to executive function and to some extent speed and attention are therefore common in patients with stress‐related burnout/exhaustion. In this paper we present a follow‐up of cognitive performance in patients with stress‐related exhaustion several years after they initially sought medical care. Thirty patients and 27 healthy controls, mean age 49 years (SD 6.5) and 55 years (SD 6.7) respectively, were included, all of whom had undergone baseline measurements of neuropsychological functioning. The mean follow‐up time was three years. Half of the patients still reported mental health problems at follow‐up and over time no major changes in cognitive performance were noted. The patients still performed significantly poorer than controls with regard to cognitive functions, mainly related to speed, attention and memory function. Long‐lasting impairment of cognitive functions related to speed, attention and memory function noted in patients with stress‐related exhaustion should be acknowledged and taken into consideration during treatment and when discussing a return to work. Follow‐up periods longer than three years are needed to explore the persistence of the cognitive impairment. 相似文献
847.
Antisocial behavior reduces the association between subdimensions of ADHD symptoms and alcohol use in a large population‐based sample of adolescents 下载免费PDF全文
Sara Lövenhag Peter Larm Cecilia Åslund Kent W. Nilsson 《Scandinavian journal of psychology》2015,56(5):489-497
The aim of this study was to investigate possible effects of antisocial behavior on reducing the association between subdimensions of ADHD symptoms (inattention, hyperactivity and impulsivity) and alcohol use. Boys and girls were analyzed separately using a population‐based Swedish adolescent sample. A randomly selected cross‐sectional survey was performed in secondary and upper secondary schools in Västmanland County during 2010. Participants were a population of 2,439 15–16 year‐olds and 1,425 17–18 year‐olds (1,947 girls and 1,917 boys). Psychosocial adversity, antisocial behaviors, symptoms of ADHD and alcohol use were assessed by questionnaires. Except for girls' inattention, subdimensions of ADHD symptoms were not associated with alcohol use when variance due to antisocial behavior was accounted for. Among boys, instead of an indirect effect of antisocial behavior on the association between impulsivity and alcohol use, a moderating effect was found. Among girls, the inattention component of ADHD was independently associated with alcohol use even when adjusted for antisocial behavior. The reduced associations between symptoms of hyperactivity, impulsivity, and alcohol use for boys and girls after adjusting for antisocial behavior suggest a considerable overlap between hyperactivity, impulsivity, and antisocial behavior. The direct pathway between inattention and alcohol use among girls suggests that girls with inattention symptoms are at risk of alcohol use regardless of antisocial behavior. Special attention should be given to these girls. Accounting for antisocial behavior reduced the relation between subdimensions of ADHD symptoms and alcohol use, and antisocial behaviors should therefore be screened for when symptoms of ADHD are present. 相似文献
848.
Michela Schröder‐Abé Almut Rudolph Anja Wiesner Astrid Schütz 《International journal of psychology》2007,42(3):174-183
Recent research has provided increasing evidence that discrepancies between implicit and explicit self‐esteem (SE) are related to defensiveness. However, only one pattern, called fragile SE (a combination of high explicit and low implicit SE), has been the focus of research so far. Relatively little attention has been paid to the second possible SE discrepancy (low explicit/high implicit). We propose that both types of discrepancies are maladaptive, because they indicate a lack of integration in self‐representation. We conducted two studies on the correlates of discrepant SE in the sphere of defensiveness. We hypothesized that persons with discrepant SE exhibit more defensive behaviour than individuals with congruent SE. In two student samples, explicit SE was measured by means of the Multidimensional Self‐Esteem Scale. Implicit SE was measured with the Name Letter Technique (Study 1) and an Implicit Association Test (Study 2). In Study 1 (N = 102) we examined effects of implicit and explicit SE on defensive reactions to ambiguous statements. For this purpose, we adapted the Ambiguous Statements Task (AST, Tafarodi, 1998 ), a procedure that measures participants' tendency to interpret ambiguous expressions in a positive vs negative manner. We found that the combination of low explicit SE and high implicit SE was associated with a more positive interpretation of the ambiguous statements. Study 2 (N = 87) investigated the effects of discrepant SE on reactions to SE threat in an experimental setting. The time participants spent reading positive or negative social feedback was used as an unobtrusive measure of defensiveness. We found that people with discrepant SE went through the negative feedback faster than people with congruent SE. In sum, the studies provide converging evidence that both kinds of discrepancies between implicit and explicit SE are related to defensive behaviour. 相似文献
849.
Children with pre‐ or perinatal brain injury (PL) exhibit marked plasticity for language learning. Previous work has focused mostly on the emergence of earlier‐developing skills, such as vocabulary and syntax. Here we ask whether this plasticity for earlier‐developing aspects of language extends to more complex, later‐developing language functions by examining the narrative production of children with PL. Using an elicitation technique that involves asking children to create stories de novo in response to a story stem, we collected narratives from 11 children with PL and 20 typically developing (TD) children. Narratives were analysed for length, diversity of the vocabulary used, use of complex syntax, complexity of the macro‐level narrative structure and use of narrative evaluation. Children’s language performance on vocabulary and syntax tasks outside the narrative context was also measured. Findings show that children with PL produced shorter stories, used less diverse vocabulary, produced structurally less complex stories at the macro‐level, and made fewer inferences regarding the cognitive states of the story characters. These differences in the narrative task emerged even though children with PL did not differ from TD children on vocabulary and syntax tasks outside the narrative context. Thus, findings suggest that there may be limitations to the plasticity for language functions displayed by children with PL, and that these limitations may be most apparent in complex, decontextualized language tasks such as narrative production. 相似文献
850.