全文获取类型
收费全文 | 25528篇 |
免费 | 248篇 |
出版年
2023年 | 41篇 |
2022年 | 28篇 |
2021年 | 46篇 |
2020年 | 110篇 |
2019年 | 110篇 |
2018年 | 3588篇 |
2017年 | 2916篇 |
2016年 | 2399篇 |
2015年 | 323篇 |
2014年 | 191篇 |
2013年 | 663篇 |
2012年 | 800篇 |
2011年 | 2646篇 |
2010年 | 2655篇 |
2009年 | 1648篇 |
2008年 | 1905篇 |
2007年 | 2398篇 |
2006年 | 240篇 |
2005年 | 420篇 |
2004年 | 386篇 |
2003年 | 335篇 |
2002年 | 256篇 |
2001年 | 137篇 |
2000年 | 147篇 |
1999年 | 115篇 |
1998年 | 124篇 |
1997年 | 95篇 |
1996年 | 86篇 |
1995年 | 76篇 |
1994年 | 86篇 |
1993年 | 55篇 |
1992年 | 71篇 |
1991年 | 42篇 |
1990年 | 58篇 |
1989年 | 31篇 |
1988年 | 23篇 |
1987年 | 37篇 |
1986年 | 35篇 |
1985年 | 37篇 |
1984年 | 33篇 |
1983年 | 51篇 |
1982年 | 41篇 |
1981年 | 32篇 |
1980年 | 29篇 |
1979年 | 39篇 |
1978年 | 44篇 |
1977年 | 27篇 |
1976年 | 29篇 |
1974年 | 13篇 |
1973年 | 13篇 |
排序方式: 共有10000条查询结果,搜索用时 359 毫秒
931.
Tara M. Emmers-Sommer 《Sexuality & culture》2018,22(1):48-62
The purpose of this investigation is to examine the associations among gender and reasons for pornography consumption as well as attitudinal impacts. One hundred and forty-three participants, ranging in age from 18 to 48 (M = 21.22), participated in an online study at a large, southwestern university. Seventy-six of these participants identified as current consumers of pornography and are the primary focus of the analyses. Findings indicate that regardless of gender, pornography is preferably consumed in a solitary fashion for masturbatory purposes with a perceived positive physical, but not psychological, sexual satisfying impact for the self as well as for the consuming partner. Further, regarding attitudinal impacts, current male consumers of pornography report significantly higher adversarial sexual beliefs, rape myth acceptance and sexual conservatism than do current female consumers of pornography. Discussion and future directions follow. 相似文献
932.
933.
934.
Mia A. McLean Vanessa E. Cobham Gabrielle Simcock 《Clinical child and family psychology review》2018,21(2):203-223
The deleterious association between various types of prenatal maternal psychological distress (PNMS, anxiety, depression, psychological distress, stress) and childhood anxiety symptomatology (internalizing behaviors, anxiety symptoms) has been established using both retrospective and prospective longitudinal studies across varied demographic cohorts and throughout development. Yet, the existing literature cannot claim maternal distress during pregnancy to be a specific risk factor for anxiety symptomatology, as studies utilizing such observational designs are unable to adequately account for confounding of potential genetic factors and the postnatal environment. In this review, we examine studies that attempt to minimize such confounding and thus disentangle the unique intrauterine exposure effect of varying types of PNMS on childhood anxiety symptomatology. Such methodologies include paternal versus maternal comparison studies, sibling comparisons, prenatal cross-fostering designs and timing of exposure studies (including disaster studies). Of the identified studies, findings indicate that prenatal maternal distress is likely to constitute a risk factor for anxiety symptomatology, although more studies are needed to replicate current findings in order to determine whether there are clear differences in effects across specific types of PNMS and for specific subpopulations. We review the methodological limitations and strengths of the literature prior to exploring avenues of future research and implications for theory and clinical practice. 相似文献
935.
Erin A. Brown Alexandra De Young Roy Kimble Justin Kenardy 《Clinical child and family psychology review》2018,21(2):224-245
Understanding how parents influence their child’s medical procedures can inform future work to reduce pediatric procedural distress and improve recovery outcomes. Following a pediatric injury or illness diagnosis, the associated medical procedures can be potentially traumatic events that are often painful and distressing and can lead to the child experiencing long-term physical and psychological problems. Children under 6 years old are particularly at risk of illness or injury, yet their pain-related distress during medical procedures is often difficult to manage because of their young developmental level. Parents can also experience ongoing psychological distress following a child’s injury or illness diagnosis. The parent and parenting behavior is one of many risk factors for increased pediatric procedural distress. The impact of parents on pediatric procedural distress is an important yet not well-understood phenomenon. There is some evidence to indicate parents influence their child through their own psychological distress and through parenting behavior. This paper has three purposes: (1) review current empirical research on parent-related risk factors for distressing pediatric medical procedures, and longer-term recovery outcomes; (2) consider and develop existing theories to present a new model for understanding the parent–child distress relationship during medical procedures; and (3) review and make recommendations regarding current assessment tools and developing parenting behavior interventions for reducing pediatric procedural distress. 相似文献
936.
Mhairi McKenzie Smith Snehal Pinto Pereira Lynette Chan Charlotte Rose Roz Shafran 《Clinical child and family psychology review》2018,21(2):246-265
Siblings of children and young people with a chronic illness are at increased risk of poor psychological functioning. A number of studies have attempted to implement and evaluate interventions targeting the psychological well-being of this at-risk group. This systematic review summarises the evidence regarding psychological functioning of siblings following an intervention targeting their well-being. The meta-analysis considered behaviour and knowledge, two of the most frequently studied outcomes. The following databases were used: PsycINFO, EMBASE, CINAHL, PubMed, Scopus and Web of Science. Seventeen studies were eligible to be included in the systematic review and eight in the meta-analysis. Results from the systematic review reflected the inconsistency of intervention evaluations in this area with a high level of heterogeneity and a total of 23 outcomes considered across the 17 included studies. The meta-analysis estimated effect sizes using a standardised mean difference (SMD) approach. Pre-post analysis suggested significant improvement in behavioural outcomes and knowledge of their sibling’s health conditions with a SMD of ? 0.44 [95% CI (? 0.6, ? 0.29); p = 0.000] and 0.69 [(95% CI = 0.42, 0.96); p = 0.000], respectively. The SMD was not significant for behavioural outcomes when considering treatment–control studies. In conclusion, the findings suggest interventions for well-being have a positive effect on the psychological functioning of siblings of children and young people with a chronic illness, but their specificity needs to be established. There is a need for further, more methodologically robust research in this area. 相似文献
937.
Marija Maric Anika Bexkens Susan M. Bögels 《Clinical child and family psychology review》2018,21(3):340-353
Comorbidity rates between ADHD and anxiety disorders (AD) are high, but little is known about the nature of this co-occurrence. A dominant idea is that AD may intensify some (i.e., attention and working memory) and attenuate other (i.e., inhibition) ADHD symptoms. Results are mixed, potentially because of between-study differences. To investigate this further we performed a meta-regression analysis on 11 studies (n ‘ADHD-only’ = 695; n ‘ADHD + AD’ = 608), containing 35 effect sizes on attention, inhibition and working memory. Main results were: (1) no evidence of a negative effect of AD on attention and working memory; (2) better response inhibition in children with ADHD with AD than those with only ADHD (medium ES g = ? .40); (3) medication moderated this association: the effect seemed limited to studies that included medication-naïve participants; (4) the difference between the two groups increased with age for attention and with proportion of boys for working memory ability. There was no effect of comorbid disruptive behavior disorder. In conclusion, AD seems to be a protective factor for inhibition problems as assessed with laboratory tasks in ADHD, especially in children who are medication naïve. Further, AD may have a protective function for attention in older children, and for working memory in boys with ADHD. It is therefore important to screen for AD when diagnosing ADHD, and to educate those with comorbid AD about the possible positive function of feeling anxious. Potential negative effects of ADHD medication on inhibition in children with comorbid AD should be considered. 相似文献
938.
Jerzy Gołosz 《Axiomathes》2018,28(4):395-417
The aim of this paper is to make presentism a dynamic view of reality by basing it on a notion of dynamic existence, that is, on a notion of existence which has a dynamic character. The paper shows that both of the notions of existence which are used in metaphysical theories of time (in presentism and eternalism) have a static character and, while such a notion is useful for eternalists, it is useless for presentists if they want to make their view able to remain in agreement with our everyday experience and self-consistent. It is demonstrated that both empirical and theoretical arguments indicate that the presentist should replace the notion of this static existence with the notion of a dynamic existence and that this maneuver allows the presentist to treat his/her existential thesis as equivalent to the thesis that time flows. Not only does this strategy allow us to express presentism in a simple, homogenous way which remains in agreement with our experience, but also permits us to solve some of the difficult problems which presentism faces, such as, for example, the objection of triviality and the question about the rate of time passage. Moreover, such an approach to presentism allows us to solve fundamental metaphysical problems concerning time such as the problem of the openness of the future and the fixity of the past, direction of causation, and relations between presentism and persistence through time by endurance. 相似文献
939.
Bjørn M. Hofmann 《Axiomathes》2018,28(6):695-708
In order to investigate the relationship between scientific evidence and social commitments this article addresses three questions: (1) does low dose ionizing radiation cause cancer? (2) Is the answer to this question different in a social setting than in a scientific context? (3) What are the consequences of the answers of 1 and 2 for the relationship between epistemology and ethics as played out in radiation protection? Conceptual analysis with basis in the philosophy of science, in particular traditional theories of causality. Whether low dose ionizing radiation causes cancer deeply depends on what we mean by causality. According to traditional scientific conceptions of causality it is not warranted to say that low dose ionizing radiation causes cancer. Standard approaches in radiation protection, however, imply that there is a causal connection, which is due to the strong social commitment in the field. There is a close relationship between social and scientific conceptions of causality, posing a series of challenges: one being that scientists covertly become moral experts, another one that the general public can be misinformed. There is a difference between causality in science and in policy making. Mixing these conceptions, as sometimes is done in radiation protection, can be misleading. Whether low dose ionizing radiation causes cancer is a social and not only a scientific issue. As such those who are warranted to have a say. 相似文献
940.
Anthony O’Hear 《Axiomathes》2018,28(6):639-651
An ideal view is sketched of the relationship between the facts established in science and the values of ethics and politics, and of the distinction between them. Some necessary qualifications are drawn, which do not essentially undermine the ideal. Then two cases of scientific work are considered in which considerations of value may in different ways be playing a more intimate role in the science than the ideal would suggest. These are Darwin’s theory of evolution and the current consensus on climate change. Are any general lessons to be drawn from these cases? 相似文献