全文获取类型
收费全文 | 34242篇 |
免费 | 1253篇 |
国内免费 | 13篇 |
专业分类
35508篇 |
出版年
2019年 | 365篇 |
2018年 | 541篇 |
2017年 | 612篇 |
2016年 | 604篇 |
2015年 | 426篇 |
2014年 | 546篇 |
2013年 | 3000篇 |
2012年 | 1009篇 |
2011年 | 1097篇 |
2010年 | 674篇 |
2009年 | 677篇 |
2008年 | 1005篇 |
2007年 | 955篇 |
2006年 | 898篇 |
2005年 | 856篇 |
2004年 | 849篇 |
2003年 | 793篇 |
2002年 | 864篇 |
2001年 | 934篇 |
2000年 | 913篇 |
1999年 | 734篇 |
1998年 | 454篇 |
1997年 | 408篇 |
1996年 | 356篇 |
1993年 | 364篇 |
1992年 | 610篇 |
1991年 | 537篇 |
1990年 | 579篇 |
1989年 | 533篇 |
1988年 | 512篇 |
1987年 | 523篇 |
1986年 | 513篇 |
1985年 | 563篇 |
1984年 | 509篇 |
1983年 | 476篇 |
1982年 | 416篇 |
1981年 | 380篇 |
1979年 | 513篇 |
1978年 | 446篇 |
1977年 | 401篇 |
1976年 | 371篇 |
1975年 | 481篇 |
1974年 | 523篇 |
1973年 | 452篇 |
1972年 | 404篇 |
1971年 | 350篇 |
1969年 | 391篇 |
1968年 | 427篇 |
1967年 | 372篇 |
1966年 | 383篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
In this study, we examined factors associated with relapse and maintenance following a self-management training course. Thirty-five community professionals participated in a 3-week (30-hr) graduate-level extension course in self-management, which included a self-modification project. Results at a 10-week follow-up showed that end-of-class self-efficacy and outcome expectancy correctly classified over 80% of those who maintained gains in their projects versus those who relapsed. The professionals in the relapsed group also reported significantly more difficulty with anticipated high-risk situations than did those in the maintenance group. 相似文献
72.
In this study, 24 professional writers completed a short pencil-and-paper questionnaire on which they indicated how they felt before, at a pause, and after specific writing episodes. The intensity with which they experienced 20 emotions was assessed, as was the frequency with which these emotions were experienced when writing in general. Results indicated that the professionals experienced positive emotions significantly more often when writing in general than they experienced either negative-active or negative-passive emotions. Negative-passive emotions such as boredom, shame, and shyness were particularly rare and weak. During the actual writing process, positive emotions tended to intensify, whereas negative-passive and negative-active emotions resisted change. Sponsorship of writing had little impact on the quality of emotions experienced during the process. The professional poets, however, experienced negative-active emotions significantly more often when writing in general than did the prose writers. 相似文献
73.
74.
Subjects (N= 28) performing a complex disjunctive concept-formation task on a microcomputer were given the opportunity to seek help following failure to correctly identify concepts. The proportion of those seeking help was significantly greater when the source of help was the computer itself (86%) rather than another person (36%). Consistent with past research, those who did not ask for help gave reasons other than the potential negative social consequences of doing so. Self-report data and a systematic test for the presence of experimenter-induced demand ruled out several possible sources of confounding. The results have implications for designers of time-sharing and networked computer systems. 相似文献
75.
The individual deciding on a nuclear weapons production policy is faced with a dilemma in which a choice must be made to support one of several conflicting defense policies. In order to investigate the social-psychological variables that are related to armament policy decision making, a telephone survey was conducted in the City of St. Louis, Missouri. Adult subjects (N= 110) responded to questions concerned with cognitive, attitudinal, and emotional responses to nuclear arms. Participants were also asked to choose a weapons production policy for the United States under conditions of continued and decreased Soviet nuclear arms production. Results indicated that respondents decisions about nuclear weapons production were related to their support for deterrence, the availability of their nuclear-related images, their emotional response to nuclear war, their attributions of responsibility for the prevention of nuclear war, and their political party affiliation. Distinctions between antinuclear decision-makers and pronuclear decision-makers are discussed. 相似文献
76.
Neuroticism, extraversion, and related traits in adult twins reared apart and reared together 总被引:3,自引:0,他引:3
N L Pedersen R Plomin G E McClearn L Friberg 《Journal of personality and social psychology》1988,55(6):950-957
The relative importance of genetic and environmental factors for neuroticism, extraversion, impulsivity, and monotony avoidance were estimated in a sample of 99 monozygotic and 229 dizygotic pairs of twins reared apart (TRA) and a matched sample of 160 monozygotic and 212 dizygotic pairs of twins reared together (TRT). The average age was 58.6 (SD = 13.6); 72% of the twins were 50 or older. Model-fitting analyses verified the importance of genetic factors for all four measures; from 23% to 45% of the total variation was attributable to genetic sources. There was considerable evidence that these factors were operating in a nonadditive manner for extraversion and impulsivity. Shared environment accounted for less than 10% of the variance; some evidence for selective placement was found for neuroticism. 相似文献
77.
Traits and states are concepts that people use to both describe and understand themselves and others. We show that people view these concepts as prototype-based categories that have a graded internal structure and fuzzy boundaries and identify a set of attributes that define the prototypical cores of two categories: traits and states. Prototypical traits are stable, long-lasting, and internally caused. Prototypical states are temporary, brief, and caused by external circumstances. These prototypes are not defined by averages, as the family-resemblance principle would suggest, but by ideal (or extreme) attribute values. Like other ideal-based categories, traits and states serve particular goals. Trait concepts permit people to predict the present from the past; state concepts identify those behaviors that can be controlled by manipulating the situation. These two complementary schemas are part of the extensive theory of psychological causality that is implicit in language. Abstract social concepts differ from object categories in their category standards, the nature of their attributes, and the interrelations among those attributes. 相似文献
78.
79.
The kinematic parameters of to and fro forearm movements in the horizontal plane were investigated in 5- to 7-year-old boys. In one condition, the period of the movements was induced by an acoustic stimulus, while the amplitude was left free. In a second condition, the amplitude of the swing was suggested by a visual frame, but the movement was self-paced. In both conditions, the unconstrained variable (amplitude and period, respectively) was found to covary spontaneously with the constrained variable. The results suggest that, within the age range considered here, motor control processes do not conceive of amplitude and velocity as two independent variables. 相似文献
80.
J T Cacioppo J S Martzke R E Petty L G Tassinary 《Journal of personality and social psychology》1988,54(4):592-604
Previous research has demonstrated that mild negative emotional imagery and unpleasant sensory stimuli lead to greater electromyographic activity over the brow muscle region than mild positive imagery and stimuli, even in the absence of significant changes in visceral and general facial EMG activity. Previous research has not addressed whether electromyographic responses over the brow region are a sensitive and specific index of emotions, however, since a multiplicity of events lead to changes in brow activity. In this research, facial electromyographic and audiovisual recordings were obtained while individuals were interviewed about themselves. Afterwards, individuals were asked to describe what they had been thinking of during specific segments of the interview marked by distinctive electromyographic responses over the brow region in the context of ongoing but stable levels of activity elsewhere in the face. The results are interpreted in terms of a continuous flow hypothesis of affect-laden information processing. 相似文献