全文获取类型
收费全文 | 4184篇 |
免费 | 211篇 |
国内免费 | 1篇 |
专业分类
4396篇 |
出版年
2023年 | 26篇 |
2022年 | 29篇 |
2021年 | 46篇 |
2020年 | 76篇 |
2019年 | 99篇 |
2018年 | 143篇 |
2017年 | 146篇 |
2016年 | 176篇 |
2015年 | 89篇 |
2014年 | 148篇 |
2013年 | 469篇 |
2012年 | 222篇 |
2011年 | 220篇 |
2010年 | 132篇 |
2009年 | 126篇 |
2008年 | 196篇 |
2007年 | 186篇 |
2006年 | 154篇 |
2005年 | 128篇 |
2004年 | 145篇 |
2003年 | 144篇 |
2002年 | 123篇 |
2001年 | 92篇 |
2000年 | 81篇 |
1999年 | 59篇 |
1998年 | 59篇 |
1997年 | 49篇 |
1996年 | 52篇 |
1995年 | 54篇 |
1994年 | 44篇 |
1993年 | 38篇 |
1992年 | 45篇 |
1991年 | 38篇 |
1990年 | 46篇 |
1989年 | 30篇 |
1988年 | 45篇 |
1987年 | 27篇 |
1986年 | 23篇 |
1985年 | 30篇 |
1984年 | 31篇 |
1983年 | 19篇 |
1982年 | 31篇 |
1981年 | 16篇 |
1980年 | 17篇 |
1979年 | 26篇 |
1978年 | 23篇 |
1977年 | 20篇 |
1974年 | 20篇 |
1972年 | 18篇 |
1968年 | 14篇 |
排序方式: 共有4396条查询结果,搜索用时 0 毫秒
141.
Science and Engineering Ethics - 相似文献
142.
143.
Marques-Carneiro José Eduardo Polgári Patrik Koning Estelle Seyller Emilie Martin Brice Van der Burg Erik Giersch Anne 《Attention, perception & psychophysics》2020,82(6):2821-2836
Attention, Perception, & Psychophysics - Learning and imitating a complex motor action requires to visually follow complex movements, but conscious perception seems too slow for such tasks.... 相似文献
144.
Female rats, chronically treated with Testosterone Propionate (TP), were injected with Fluprazine (DU 27716) or saline and tested for social aggression, masculine and feminine sexual behavior. Fluprazine-treated females were less aggressive than saline-treated females, as indicated by a shift from offensive to less offensive parameters of aggression. At the same time, mounting in Fluprazine-treated females was almost totally abolished, both in aggression tests and in tests for sexual behavior. Feminine sexual responses increased during aggressive encounters but were slightly inhibited when females were confronted with sexually active males. Females treated with Fluprazine and tested for mounting with a receptive female showed a substantial increase of offensive aggression directed at the receptive stimulus female. It is concluded that Fluprazine does not selectively inhibit offensive aggression in TP-treated female rats. 相似文献
145.
146.
Elizabeth G. Spitzer MA Kelly L. Zuromski MS Margaret T. Davis PhD Tracy K. Witte PhD Frank Weathers PhD 《Suicide & life-threatening behavior》2018,48(1):105-115
This study used the interpersonal–psychological theory of suicide to explore the relationships among DSM-5 posttraumatic stress disorder (PTSD) symptom clusters derived from the six-factor anhedonia model and facets of acquired capability for suicide (ACS). In a sample of 373 trauma-exposed undergraduates, most PTSD symptom clusters were negatively associated with facets of ACS in bivariate correlations, but the anhedonia cluster was positively associated with ACS in regression models. Structure coefficients and commonality analysis indicated that anhedonia served as a suppressor variable for the other symptom clusters. Our findings further elucidate the complex relationship between specific PTSD symptom clusters and ACS. 相似文献
147.
We investigated the parameters of involuntary word reading in the Stroop task in 7 experiments. Experiments 1-4 varied response modality and the presence of congruent word trials in a test of the claim that presenting a Stroop color word with only one letter in the target color eliminates the Stroop effect. Experiments 5 and 6 addressed the roles of spatial attention and orthographic processing as possible mechanisms behind the reduction of Stroop effects with the single-letter format. Experiment 7 investigated the limits of involuntary reading under optimal conditions for selective processing of rectangular color patch targets. We found that the single-letter format reduced but never eliminated Stroop effects, spatial attention but not orthographic processing plays a role in the effect of the single-letter format, and word reading is not completely prevented even with austere presentation conditions. We conclude with a defense of the involuntariness criterion for automaticity in the Stroop task, particularly when word reading is viewed in the context of a skilled performance. 相似文献
148.
Three years of daily crisis calls (N=2,513,478) were examined in a regression analysis with terms for effects for weekday, end and beginning of the month, holiday, seasonal trend, and long-term linear trend. This was followed by an analysis of residuals using hidden Markov models, with three states best fitting the residuals. These states may reflect economic or environmental variables which researchers should clarify in further work. 相似文献
149.
This study examined the relationships, using regression analysis, among bulimic symptomatology, body-image characteristics, and personality factors in a nonclinical sample of 46 undergraduate university men. They completed the Bulimia Test-Revised (a measure of bulimic symptomatology), the Eysenck Personality Questionnaire-Revised (a measure of personality characteristics), and the Multidimensional Body-Self Relations Questionnaire (a multidimensional measure of body-image parameters). Statistically significant relationships were identified among Appearance Evaluation, Neuroticism, and Psychoticism, and the BULIT-R scores. 相似文献
150.
Van den Bergh O Winters W Devriese S Van Diest I 《Scandinavian journal of psychology》2002,43(2):147-152
Symptom episodes often show a spatio-temporal structure, that is, they occur in a specific context for a certain duration. Repeated experiences may therefore be construed as associative learning trials, in which context elements are turned into predictive cues, triggering anticipatory processes conducive to subjective health complaints. A series of experiments, using inhalations of air enriched with CO2 and external (odors) or internal (mental images) stimuli as cues, is discussed to show that subjective health complaints may occur upon presenting the cue alone. Learned symptoms may be unrelated to bodily responses and easily generalize to new related cues. Better learning occurs to cues with a negative affective valence and in participants scoring high for negative affectivity. Our findings are relevant to the understanding of medically unexplained ("functional") syndromes and the poor relationship between objective and subjective health indicators in general. 相似文献