全文获取类型
收费全文 | 9028篇 |
免费 | 551篇 |
国内免费 | 2篇 |
出版年
2020年 | 206篇 |
2019年 | 144篇 |
2018年 | 175篇 |
2017年 | 247篇 |
2016年 | 262篇 |
2015年 | 212篇 |
2014年 | 218篇 |
2013年 | 1018篇 |
2012年 | 321篇 |
2011年 | 312篇 |
2010年 | 224篇 |
2009年 | 234篇 |
2008年 | 242篇 |
2007年 | 219篇 |
2006年 | 228篇 |
2005年 | 175篇 |
2004年 | 174篇 |
2003年 | 171篇 |
2002年 | 188篇 |
2001年 | 238篇 |
2000年 | 215篇 |
1999年 | 188篇 |
1998年 | 86篇 |
1996年 | 112篇 |
1995年 | 89篇 |
1993年 | 105篇 |
1992年 | 163篇 |
1991年 | 177篇 |
1990年 | 162篇 |
1989年 | 130篇 |
1988年 | 131篇 |
1987年 | 127篇 |
1986年 | 131篇 |
1985年 | 135篇 |
1984年 | 105篇 |
1983年 | 96篇 |
1981年 | 86篇 |
1980年 | 83篇 |
1979年 | 133篇 |
1978年 | 95篇 |
1977年 | 88篇 |
1975年 | 84篇 |
1974年 | 110篇 |
1973年 | 99篇 |
1972年 | 82篇 |
1971年 | 82篇 |
1970年 | 80篇 |
1969年 | 84篇 |
1968年 | 82篇 |
1967年 | 95篇 |
排序方式: 共有9581条查询结果,搜索用时 46 毫秒
11.
Collin L. Davidson MS LaRicka R. Wingate PhD Kathy A. Rasmussen BA Meredith L. Slish BA 《Suicide & life-threatening behavior》2009,39(5):499-507
The current study hypothesized that (1) hope would negatively predict burdensomeness, thwarted belongingness, and acquired capability to enact lethal injury; (2) hope would negatively predict suicidal ideation; and (3) the interpersonal suicide risk factors would predict suicidal ideation. Results indicated that hope negatively predicted burdensomeness and thwarted belongingness, but positively predicted acquired capability to enact suicide. Contrary to our second hypothesis, hope did not predict suicidal ideation, but interpersonal risk factors for suicide predicted suicidal ideation. Results are discussed in terms of implications for hope theory and Joiner's (2005) interpersonal risk factors for suicide, and for clinical practice. 相似文献
12.
13.
J.B. Trobalon J. Sansa V. D. Chamizo N.J. Mackintos 《The Quarterly Journal of Experimental Psychology Section B: Comparative and Physiological Psychology》1991,43(4):389-402
In Experiment 1, rats were trained on a discrimination between rubber- and sandpaper-covered arms of a maze after one group had been pre-exposed to these intra-maze cues. Pre-exposure facilitated subsequent discrimination learning, unless the discrimination was made easier by adding further discriminative stimuli, when it now significantly retarded learning. In Experiment 2, rats were trained on an extra-maze spatial discrimination, again after one group, but not another, had been pre-exposed to the extra-maze landmarks. Here too, pre-exposure facilitated subsequent discrimination learning, unless the discrimination was made substantially easier by arranging that the two arms between which rats had to choose were always separated by 135°. The results of both experiments can be explained by supposing that perceptual learning depends on the presence of features common to S+ and S-. 相似文献
14.
15.
16.
Population attributable risk (PAR) estimates have been used in suicide research to evaluate the impact of psychosocial and socioeconomic risk factors, including affective disorders, traumatic life events, and unemployment. A parallel concept of preventive fraction (PF), allowing for estimation of the impact of protective factors and effectiveness of preventive interventions, is practically unknown in suicidology. The study authors discuss the application of both concepts to suicide research and prevention, and review literature on the subject. Despite several methodological and conceptual limitations, both PAR and PF are valuable instruments to inform development and evaluation of suicide prevention programs. 相似文献
17.
Judith Volmer Cornelia Niessen Daniel Spurk Alexandra Linz Andrea E. Abele 《Psychologie appliquee》2011,60(4):522-545
While previous research has mainly emphasised the importance of leader–member exchange (LMX) to job satisfaction, there is a lack of research on reciprocal relationships between job satisfaction and LMX. In this study, we not only suggest that good LMX increases job satisfaction, but that job satisfaction can also enhance high‐quality supervisor–employee relationships. A full cross‐lagged panel analysis was used to test reciprocal relationships between LMX and job satisfaction. Employees (N= 279) of a large information technology company filled out questionnaires at two times, with a time lag of 3 months. In line with our predictions, findings revealed a positive relationship between LMX and job satisfaction both at Time 1 and Time 2. Moreover, LMX at Time 1 predicted the increase of job satisfaction at Time 2, and job satisfaction at Time 1 predicted the increase of LMX at Time 2. The results demonstrate the need to consider reciprocal relationships between job satisfaction and LMX when explaining employees' workplace outcomes. Our findings are discussed in terms of positive psychology theory. 相似文献
18.
19.
Kevin B. Paterson Josephine Read Victoria A. McGowan Timothy R. Jordan 《Developmental science》2015,18(2):335-343
Developing readers often make anagrammatical errors (e.g. misreading pirates as parties), suggesting they use letter position flexibly during word recognition. However, while it is widely assumed that the occurrence of these errors decreases with increases in reading skill, empirical evidence to support this distinction is lacking. Accordingly, we compared the performance of developing child readers (aged 8–10 years) against the end‐state performance of skilled adult readers in a timed naming task, employing anagrams used previously in this area of research. Moreover, to explore the use of letter position by developing readers and skilled adult readers more fully, we used anagrams which, to form another word, required letter transpositions over only interior letter positions, or both interior and exterior letter positions. The patterns of effects across these two anagram types for the two groups of readers were very similar. In particular, both groups showed similarly slowed response times (and developing readers increased errors) for anagrams requiring only interior letter transpositions but not for anagrams that required exterior letter transpositions. This similarity in the naming performance of developing readers and skilled adult readers suggests that the end‐state skilled use of letter position is established earlier during reading development than is widely assumed. 相似文献
20.