全文获取类型
收费全文 | 836篇 |
免费 | 14篇 |
国内免费 | 5篇 |
专业分类
855篇 |
出版年
2018年 | 10篇 |
2016年 | 12篇 |
2015年 | 9篇 |
2014年 | 12篇 |
2013年 | 96篇 |
2012年 | 14篇 |
2011年 | 28篇 |
2010年 | 18篇 |
2009年 | 22篇 |
2008年 | 26篇 |
2007年 | 23篇 |
2006年 | 26篇 |
2005年 | 24篇 |
2004年 | 14篇 |
2003年 | 17篇 |
2002年 | 18篇 |
2001年 | 8篇 |
1999年 | 12篇 |
1998年 | 19篇 |
1997年 | 9篇 |
1996年 | 13篇 |
1995年 | 12篇 |
1994年 | 8篇 |
1993年 | 13篇 |
1992年 | 14篇 |
1991年 | 9篇 |
1990年 | 9篇 |
1989年 | 9篇 |
1988年 | 15篇 |
1987年 | 11篇 |
1985年 | 11篇 |
1984年 | 9篇 |
1983年 | 11篇 |
1981年 | 10篇 |
1980年 | 14篇 |
1979年 | 11篇 |
1978年 | 13篇 |
1977年 | 10篇 |
1976年 | 19篇 |
1975年 | 13篇 |
1974年 | 14篇 |
1972年 | 15篇 |
1971年 | 10篇 |
1970年 | 9篇 |
1969年 | 10篇 |
1968年 | 15篇 |
1967年 | 16篇 |
1966年 | 18篇 |
1965年 | 7篇 |
1962年 | 8篇 |
排序方式: 共有855条查询结果,搜索用时 0 毫秒
211.
212.
Herbert Hendin 《Suicide & life-threatening behavior》1978,8(2):99-117
ABSTRACT: This paper explores the relationships among culture, character, and suicide. It draws on the author's research in Scandinavia and his studies of suicide among United States urban blacks and college students. The differences in motivation and significance of suicide in Sweden and Denmark are illustrated. The United States is an amalgam of subcultures which must be studied separately to identify the psychosocial determinants of behavior. The varying rates and motivations for suicide in different cultures and subcultures, the differences between men and women, between young and old, differences in ways of coping with love and loss, life and death make clear that suicide is part of a culture's possibilities. The varying psychodynamic ways in which the suicidal individual in differing cultures and subcultures conceives of, uses, and absorbs death also has much to tell us about how we live. 相似文献
213.
214.
215.
216.
In a cursor-control task, the sensed positions of cursor and hand are biased toward each other. We previously found different characteristics of implicit and explicit measures of the bias of sensed hand position toward the position of the cursor, suggesting the existence of distinct neural representations. Here we further explored differences between the two types of measure by varying the proportions of trials with explicit hand-position (H) and cursor-position (C) judgments (C20:H80, C50:H50, and C80:H20). In each trial, participants made a reaching movement to a remembered target, with the visual feedback being rotated randomly, and subsequently they judged the hand or the cursor position. Both the explicitly and implicitly measured biases of sensed hand position were stronger with a low proportion (C80:H20) than with a high proportion (C20:H80) of hand-position judgments, suggesting that both measures place more weight on the sensory modality relevant for the more frequent judgment. With balanced proportions of such judgments (C50:H50), the explicitly assessed biases were similar to those observed with a high proportion of cursor-position judgments (C80:H20), whereas the implicitly assessed biases were similar to those observed with a high proportion of hand-position judgments (C20:H80). Because strong weights of cursor-position or hand-position information may be difficult to increase further but are easy to reduce, the findings suggest that the implicit measure of the bias of sensed hand position places a relatively stronger weight on proprioceptive hand-position information, which is increased no further by a high proportion of hand-position judgments. Conversely, the explicit measure places a relatively stronger weight on visual cursor-position information. 相似文献
217.
In multilevel modeling, group-level variables (L2) for assessing contextual effects are frequently generated by aggregating variables from a lower level (L1). A major problem of contextual analyses in the social sciences is that there is no error-free measurement of constructs. In the present article, 2 types of error occurring in multilevel data when estimating contextual effects are distinguished: unreliability that is due to measurement error and unreliability that is due to sampling error. The fact that studies may or may not correct for these 2 types of error can be translated into a 2 × 2 taxonomy of multilevel latent contextual models comprising 4 approaches: an uncorrected approach, partial correction approaches correcting for either measurement or sampling error (but not both), and a full correction approach that adjusts for both sources of error. It is shown mathematically and with simulated data that the uncorrected and partial correction approaches can result in substantially biased estimates of contextual effects, depending on the number of L1 individuals per group, the number of groups, the intraclass correlation, the number of indicators, and the size of the factor loadings. However, the simulation study also shows that partial correction approaches can outperform full correction approaches when the data provide only limited information in terms of the L2 construct (i.e., small number of groups, low intraclass correlation). A real-data application from educational psychology is used to illustrate the different approaches. 相似文献
218.
In the current study, we examined the planning abilities of rhesus monkeys (Macaca mulatta) by training them on a five-item list composed of coloured photographs and then testing them on switch and mask trials. In
contrast to previous studies where monkeys made responses using a joystick, in the current study, monkeys made responses directly
to a touch screen. On switch trials, after a response to the first list item, the on-screen positions of two list items were
exchanged. Performance on trials in which the second and third list items were exchanged was poorer compared to normal (non-switch)
trials for all subjects. When the third and fourth items were exchanged, however, only one subject continued to show performance
deficits. On mask trials, following a response to the first item, the remaining items were covered by opaque white squares.
When two items were masked, all four subjects responded to each masked item at a level significantly above chance. When three
items were masked, however, only one subjected was able to respond to all three masked items at a level significantly above
chance. The results of the present study indicate that three of our four monkeys planned one response ahead while a single
monkey planned two responses ahead. The significance of these findings is discussed in relation to previous studies on planning
in chimpanzees and monkeys. 相似文献
219.
Herbert C Deutsch R Sütterlin S Kübler A Pauli P 《Cognitive, affective & behavioral neuroscience》2011,11(2):199-206
This study investigated startle reflex modulation in 33 healthy student participants during the processing of negated emotional
items. To build upon previous research, our particular interest was to find out whether processing of negated emotional items
modulates emotional responding in line with the logical meaning of the negated expression, or instead leads to paradox emotional
effects that point in the direction opposite the one logically implied by the negation. Startle reflex modulation was assessed
during silent reading of pleasant and unpleasant nouns. The nouns were either paired with the possessive pronoun my or with the negation word no. The startle eyeblink amplitude was enhanced during processing of the unpleasant pronoun–noun phrases and attenuated during
processing of the pleasant phrases. Negation attenuated the startle eyeblink for negated unpleasant nouns and enhanced it
for negated pleasant nouns. In line with this finding, negation decreased arousal ratings for unpleasant nouns and reversed
the valence ratings for pleasant nouns. Our results are the first to show an effect of negation on both peripheral physiological
and subjective indices of affective responding. Our results suggest that negation may be an effective strategy for spontaneous
down-regulation of emotional responses to unpleasant, but not to pleasant, stimuli. 相似文献
220.