全文获取类型
收费全文 | 2576篇 |
免费 | 106篇 |
出版年
2023年 | 18篇 |
2021年 | 31篇 |
2020年 | 50篇 |
2019年 | 39篇 |
2018年 | 79篇 |
2017年 | 71篇 |
2016年 | 77篇 |
2015年 | 54篇 |
2014年 | 71篇 |
2013年 | 312篇 |
2012年 | 120篇 |
2011年 | 100篇 |
2010年 | 73篇 |
2009年 | 75篇 |
2008年 | 74篇 |
2007年 | 98篇 |
2006年 | 98篇 |
2005年 | 104篇 |
2004年 | 67篇 |
2003年 | 60篇 |
2002年 | 65篇 |
2001年 | 49篇 |
2000年 | 50篇 |
1999年 | 64篇 |
1998年 | 39篇 |
1997年 | 28篇 |
1996年 | 24篇 |
1995年 | 30篇 |
1994年 | 29篇 |
1993年 | 34篇 |
1992年 | 30篇 |
1991年 | 44篇 |
1990年 | 25篇 |
1989年 | 29篇 |
1988年 | 19篇 |
1987年 | 25篇 |
1986年 | 23篇 |
1985年 | 25篇 |
1984年 | 25篇 |
1983年 | 17篇 |
1982年 | 27篇 |
1981年 | 19篇 |
1979年 | 30篇 |
1978年 | 17篇 |
1976年 | 19篇 |
1974年 | 24篇 |
1973年 | 19篇 |
1971年 | 16篇 |
1968年 | 19篇 |
1966年 | 16篇 |
排序方式: 共有2682条查询结果,搜索用时 15 毫秒
91.
AIDS-related factors predictive of suicidal ideation of low and high intent among gay and bisexual men. 总被引:1,自引:0,他引:1
S G Schneider S E Taylor M E Kemeny C Hammen 《Suicide & life-threatening behavior》1991,21(4):313-328
AIDS-related stressors were studied in relationship to suicidal ideation and suicide intent among 778 gay and bisexual men (none with AIDS). Over the previous six months, 27% (n = 212) reported suicidal ideation. Subjects who reported suicidal ideation (compared to those who did not) were more likely to report recent (last 6 months) bereavement of partner, recent ARC diagnosis, and multiple close friends with ARC. Suicide ideators were divided by a median split on a self-report scale of suicide intent into low (n = 105) and high (n = 107) intent suicide ideators. News of HIV seropositivity was specifically related to low intent suicidal ideation. High intent suicidal ideation was associated with having a partner with AIDS or ARC, or multiple close friends with AIDS, or having ARC. Generally speaking, while temporally discrete AIDS-related events were associated the report of suicidal ideation, ongoing stressors which may more greatly challenge adaptational capacities were more associated with high intent suicidal ideation. 相似文献
92.
William P. Hetrick Robert C. Isenhart Derek V. Taylor Curt A. Sandman 《Behavior research methods》1991,23(1):66-71
A software program written to collect real-time, observational data is described. The flexible program allows customized behavior codes and observational durations and simultaneously records both timed and counted events. The data are collected by means of single keystrokes, automatically stored to disk with 100th of a second resolution and summarized for each observational session. The program’s database files are dBASE III PLUS compatible and may be browsed, edited, or converted to ASCII files from the program’s main menu. Field testing demonstrated the efficiency and interobserver reliability of the program (for frequency,r=0.81; for durational behaviors,rs=0.89 and 0.96). The software operates on IBM XT/AT/PS 2s and most clones with PC/MS DOS version 2.0 or greater. 相似文献
93.
Dr. Graham Priest 《Studia Logica》1982,41(2-3):249-268
The paper concerns time, change and contradiction, and is in three parts. The first is an analysis of the problem of the instant of change. It is argued that some changes are such that at the instant of change the system is in both the prior and the posterior state. In particular there are some changes from p being true to p being true where a contradiction is realized. The second part of the paper specifies a formal logic which accommodates this possibility. It is a tense logic based on an underlying paraconsistent prepositional logic, the logic of paradox. (See the author's article of the same name Journal of Philosophical Logic 8 (1979).) Soundness and completeness are established, the latter by the canonical model construction, and extensions of the basic system briefly considered. The final part of the paper discusses Leibniz's principle of continuity: Whatever holds up to the limit holds at the limit. It argues that in the context of physical changes this is a very plausible principle. When it is built into the logic of the previous part, it allows a rigorous proof that change entails contradictions. Finally the relation of this to remarks on dialectics by Hegel and Engels is briefly discussed. 相似文献
94.
Bruce E. Compas Howard S. Adelman Pamela C. Freundl Perry Nelson Linda Taylor 《Journal of abnormal child psychology》1982,10(1):77-83
Attributions made by children and their parents for the cause of the child's clinical problem were monitored during assessment interviews. Results support previously observed differences obtained through questionnaires, with parents making more attributions than their children to characteristics of the child. This pattern was affected by variations in interview format. Parents and children differed in the locus of their attributions when interviewed individually, but these differences were not present when families were interviewed with both parents and children present. Implications for the methodology of attribution research with child-clinical populations are highlighted. 相似文献
95.
96.
Two response measures that described the consistency and accuracy of motor performance were investigated. A pursuit tracking task was used as the vehicle whereby changes in perceptual motor performance could be monitored over several learning trials. The intra-individual variability of a subject's tracking response was compared to the root mean squared error that was accumulated during each block of trials. Whereas both response measures were sensitive to the changes in performance that occured as a result of practice, neither could be considered sufficiently informative as to be used as a sole indicator of skill acquisition. It appears that both consistency and error measures are needed to describe the subjects' performance as they acquire a perceptual motor skill. 相似文献
97.
Two groups of subjects were given pairings of a slide of a triangle (CS1) with an aversive loud noise (US). After first-order conditioning a different figure (CS2+) was paired with CS1, whilst a third figure acted as a non-paired control (CS20). Conditioned second-order skin conductance responses (SCRs) were established to CS2+ for all subjects who had undergone first-order conditioning. Following second-order conditioning, SCRs to CS1 were extinguished and CS2+ was subsequently tested for retention of its SCR evoking properties. For the group of subjects who believed they had an avoidance response available during the second-order conditioning phase, CR2 failed to survive extinction of CR1. However, for the group of subjects who had no perceived control over US presentation, extinction of cr1 did not eliminate CR2. This latter finding is consistent with associative analyses of second-order conditioning in animals and has clinical implications for the treatment of fear-related problems. 相似文献
98.
T.R. Stockwell R.J. Hodgson H.J. Rankin C. Taylor 《Behaviour research and therapy》1982,20(5):513-522
Twenty hospitalized alcoholics served as their own controls in a study which sought to compare psychophysiological and cognitive factors as mediating influences on the priming effect of alcohol. Ten subjects were independently assessed by a psychiatrist as being severely dependent on alcohol and ten as mildly or moderately alcohol dependent. Physiological, behavioural and subjective indices of the motivation to drink alcohol were employed 15 and 60 min after subjects had consumed beverages on four separate occasions corresponding to four priming conditions. These priming drinks contained either 60 ml vodka in heavy dilution or just tonic water, and in each of these conditions subjects were either led to believe that the beverages contained alcohol or they had no alcohol. The severely-dependent group displayed a degree of concordance between the indices of motivation to drink, and the levels of these tended to be significantly higher than in the less-dependent subjects. The results suggest that severely alcohol-dependent subjects were more disposed to drink 60 min after consuming alcoholic drinks than after soft drinks, regardless of whether they believed that the priming drinks had contained alcohol. Cognitive factors assumed greater importance for the drinking behaviour of less-dependent subjects, although there was evidence of discordance across behavioural, physiological and subjective measures for this group. 相似文献
99.
Susan T. Fiske David A. Kenny Shelley E. Taylor 《Journal of experimental social psychology》1982,18(2):105-127
Previous research has demonstrated that salient information is overrepresented in causal attributions. Two experiments were conducted to investigate potential mediators for this effect and to make a case for the use of structural models in explanations of process. Two mediators were considered: enhanced visual recall of salient stimuli and exaggerated schema-relevant recall of salient stimuli. Although analyses of variance supported the visual recall model, structural analyses demonstrated its implausibility. Analyses of variance and structural models revealed that schema-relevant recall, that is, information seen as representative of causal influence, is a plausible mediator; this was particularly true of relevant visual information. Results suggest that salience effects (S. E. Taylor & S. T. Fiske in L. Berkowitz (Ed.), Advances in experimental social psychology (Vol. 11). New York: Academic Press, 1978) are due to: (a) the attentional advantage of inherently salient visual events and (b) the influence of stored visual and nonvisual schema-relevant information on causal judgments. 相似文献
100.
Two experiments are reported which examined the influence of context on face recognition accuracy for novel and familiar faces
respectively. Context was manipulated by varying the physical background against which the faces appeared. In Experiment I,
80 student subjects observed 18 faces before attempting to recognize them in a sequence of 36 alternatives. For half the subjects,
the backgrounds changed from study to test, while for the remainder they stayed the same. In addition, for half the subjects,
both the pose and expression of the face also changed, while for the others it remained constant. Changes in pose plus expression
and context significantly reduced recognition accuracy for the target faces. Experiment II used an identical design, except
that the faces of celebrities replaced the novel faces. The influence of context was eliminated but the effects of pose and
expression were maintained. However, when only faces which were actually identified by subjects were considered, the effects
of pose and expression, too, were eliminated. The significance of these findings for theories of contextual memory are discussed. 相似文献