全文获取类型
收费全文 | 754篇 |
免费 | 39篇 |
专业分类
793篇 |
出版年
2024年 | 2篇 |
2023年 | 9篇 |
2022年 | 8篇 |
2021年 | 13篇 |
2020年 | 18篇 |
2019年 | 28篇 |
2018年 | 32篇 |
2017年 | 35篇 |
2016年 | 36篇 |
2015年 | 15篇 |
2014年 | 20篇 |
2013年 | 83篇 |
2012年 | 39篇 |
2011年 | 39篇 |
2010年 | 31篇 |
2009年 | 27篇 |
2008年 | 37篇 |
2007年 | 27篇 |
2006年 | 25篇 |
2005年 | 22篇 |
2004年 | 19篇 |
2003年 | 23篇 |
2002年 | 24篇 |
2001年 | 10篇 |
2000年 | 13篇 |
1999年 | 4篇 |
1998年 | 10篇 |
1997年 | 4篇 |
1996年 | 16篇 |
1995年 | 8篇 |
1994年 | 10篇 |
1993年 | 13篇 |
1992年 | 15篇 |
1991年 | 4篇 |
1990年 | 4篇 |
1989年 | 3篇 |
1988年 | 3篇 |
1987年 | 5篇 |
1986年 | 7篇 |
1985年 | 9篇 |
1984年 | 7篇 |
1983年 | 5篇 |
1982年 | 3篇 |
1980年 | 4篇 |
1979年 | 5篇 |
1978年 | 5篇 |
1977年 | 5篇 |
1974年 | 3篇 |
1970年 | 2篇 |
1965年 | 1篇 |
排序方式: 共有793条查询结果,搜索用时 0 毫秒
721.
722.
Cerebellar norepinephrine modulates learning of delay classical eyeblink conditioning: evidence for post-synaptic signaling via PKA 下载免费PDF全文
Cartford MC Samec A Fister M Bickford PC 《Learning & memory (Cold Spring Harbor, N.Y.)》2004,11(6):732-737
The neurotransmitter norepinephrine (NE) has been shown to modulate cerebellar-dependent learning and memory. Lesions of the nucleus locus coeruleus or systemic blockade of noradrenergic receptors has been shown to delay the acquisition of several cerebellar-dependent learning tasks. To date, no studies have shown a direct involvement of cerebellar noradrenergic activity nor localized the post-synaptic response to cerebellar beta-noradrenergic receptor signaling. Using ipsilateral, localized infusions into cerebellar lobule HVI and interpositus (IP), we have established that blocking beta-noradrenergic receptors with propranolol significantly impairs acquisition of conditioned responses. Furthermore, interrupting activation of cAMP-dependent PKA in the cerebellum using Rp-cAMPS completely prevents acquisition. However, neither blocking beta-adrenergic receptors nor blocking PKA activation significantly interferes with performance of established conditioned responses when administered after the learned response is formed. 相似文献
723.
Chris Fraley R Niedenthal PM Marks M Brumbaugh C Vicary A 《Journal of personality》2006,74(4):1163-1190
According to adult attachment theory, individual differences in attachment-related anxiety reflect variation in individuals' vigilance to cues relevant to appraising and monitoring the availability and responsiveness of significant others. To investigate this assumption, the authors adopted a morph movie paradigm in which participants were shown movies of faces in which an emotional facial expression changed gradually to a neutral one (Study 1) or a neutral expression changed to an emotional one (Studies 2-4). Participants were asked to judge the point at which the emotional expression had disappeared or emerged, respectively. Individuals who were highly anxious with respect to attachment were more likely to perceive the offset (Study 1) as well as the onset (Studies 2 and 3) of the facial expressions of emotion earlier than other people. Moreover, this heightened state of vigilance may have led to poorer accuracy in judging facial expressions of emotion (Study 3), an effect that was reversed when anxious individuals were required to watch the movies for the same length of time as less anxious participants (Study 4). The results indicate that variation in attachment anxiety reflects, in part, differences in vigilance to cues of social and emotional significance. 相似文献
724.
The effect of color on the expected and experienced refreshment, intensity, and liking of lemon, mint, and vanilla beverages was studied. Subjects rated the expected and actual taste of brown lemon and mint solutions as less refreshing than the tastes of differently colored solutions of the same flavor. However, the refreshment ratings (expected and actual) of the brown vanilla beverage were not different from those of the vanilla beverages of other colors. Liking ratings also depended on color in a manner similar to that of the refreshment ratings. Intensity ratings also varied with color. However, unlike when subjects smell solutions rather than taste them, colored solutions were not judged as more intense than colorless ones. In fact, the clear solutions were judged as strongest. 相似文献
725.
Results of past factor analytic studies of the Childhood Anxiety Sensitivity Index and Anxiety Sensitivity Index were used to formulate hypotheses about factor models of anxiety sensitivity. Using a nonclinical sample of 767 children and adolescents and confirmatory factor analysis, hypothesized models with 2, 3, and 4 lower order factors (facets) were tested. Goodness-of-fit criteria indicated that a model with 4 facets fits these data well. Support was found for factorial invariance of the 4 facets across age and gender, using nonclinical and clinical samples. Results support a hierarchical factor model in that there was a strong general factor, explaining 71% of the variance. Findings are discussed in the context of anxiety sensitivity theory and research with children and adolescents. 相似文献
726.
Although it is estimated that domestic abuse is as common in gay male and lesbian intimate relationships as in heterosexual relationships, the legal system often fails to recognize or respond to same-gender cases. Empirical research examining the impact of sexual orientation on perceptions of abuse is virtually nonexistent. Undergraduates (N = 252) read a summary of a domestic abuse incident in which victims and perpetrators varied by gender and, by implication, sexual orientation. Victim and respondent gender, rather than the couple's sexual orientation, primarily affected responses to domestic abuse. Domestic abuse perpetrated against women was perceived to be more serious and in need of intervention than abuse against men. Women were more likely than men to believe the victim and to recommend criminal justice system interventions. Because they are inconsistent with gender role stereotypes, domestic abuse cases involving male victims or female perpetrators may not receive equitable treatment within the criminal justice system. 相似文献
727.
The genetic testing of children raises many ethical concerns. This paper examines how five position statements from Canada,
UK and USA, which present guidelines for good practice in this area produce different recommendations for carrier testing
and predictive testing. We find that the genetic information generated through carrier testing is routinely presented as less
serious than that generated from predictive testing. Additionally, the reproductive implications of predictive testing are
also routinely erased. Consequently, the papers argue strongly against predictive testing but advise caution against carrier
testing in somewhat weaker terms. We argue that these differences rest on assumptions about the status of reproduction in
people’s lives and on an ethical stance that foregrounds the self over others. We propose that questioning the crude and sharp
distinction between carrier and predictive testing in principle may enable practitioners and parents/families to make more
nuanced decisions in practice.
Parts of this work have been presented in the 1st International CESAGen Conference, London, 2004, and Genetics and Society
Meetings, Wales. 相似文献
728.
Morrison TG Kenny P Harrington A 《Genetic, social, and general psychology monographs》2005,131(3):219-250
The authors examined the psychometric properties of the gay and lesbian versions of the Modern Homonegativity Scale (MHS-G and MHS-L) in samples of heterosexual Irish university students (Ns=179 and 353). Confirmatory factor analyses revealed that the MHS-G and MHS-L were unidimensional and factorially distinct from a well-established measure of old-fashioned homonegativity (Attitudes Toward Lesbians and Gay Men Scale [ATLG]). Alpha coefficients for both versions of the MHS were good (range = .81 to .86), with 95% confidence intervals suggesting that unsatisfactory levels of scale score reliability (i.e., alpha values < .70) were relatively implausible. As hypothesized, participants' level of modern homonegativity correlated positively with their levels of old-fashioned and modem racism, patriotism, nationalism, religious fundamentalism, social dominance, and perceived political conservatism. The authors also observed a substantial inverse correlation between modern prejudice toward sexual minorities and support for their human rights. Finally, a series of multiple regression analyses indicated that, despite their interrelatedness, modern and old-fashioned homonegativity, particularly as they pertain to gay men, possess differential predictors. Limitations of the current series of studies and the need to conduct further research on attitudes toward sexual minorities within an Irish context are also discussed. 相似文献
729.
On the basis of the stress and coping literature, the authors examined the diverse coping strategies used by expatriate managers in response to the problems encountered while on international assignments. It was hypothesized that although problem-focused coping strategies may be more effective than are emotion-focused coping strategies in affecting cross-cultural adjustment and intention to remain on the international assignment, the relationship is moderated by contextual factors such as hierarchical level in the organization, time on the assignment, and cultural distance. Coded semistructured interview responses from 116 German expatriates on assignment in either Japan or the United States were analyzed with moderated regression analyses. The results suggest that the effectiveness of problem-focused coping strategies in predicting cross-cultural adjustment is moderated by cultural distance and position level but not by time on the assignment. The use of problem-focused coping strategies was not related to expatriates' intention to remain on the assignment. 相似文献
730.