全文获取类型
收费全文 | 3208篇 |
免费 | 104篇 |
国内免费 | 3篇 |
出版年
2020年 | 40篇 |
2019年 | 53篇 |
2018年 | 64篇 |
2017年 | 75篇 |
2016年 | 93篇 |
2015年 | 40篇 |
2014年 | 62篇 |
2013年 | 381篇 |
2012年 | 112篇 |
2011年 | 104篇 |
2010年 | 63篇 |
2009年 | 72篇 |
2008年 | 89篇 |
2007年 | 78篇 |
2006年 | 84篇 |
2005年 | 100篇 |
2004年 | 79篇 |
2003年 | 82篇 |
2002年 | 82篇 |
2001年 | 42篇 |
2000年 | 34篇 |
1999年 | 43篇 |
1998年 | 57篇 |
1997年 | 39篇 |
1996年 | 44篇 |
1995年 | 38篇 |
1994年 | 38篇 |
1993年 | 39篇 |
1992年 | 36篇 |
1991年 | 47篇 |
1990年 | 38篇 |
1989年 | 53篇 |
1988年 | 44篇 |
1987年 | 37篇 |
1986年 | 32篇 |
1984年 | 52篇 |
1983年 | 39篇 |
1982年 | 50篇 |
1981年 | 43篇 |
1980年 | 44篇 |
1979年 | 46篇 |
1978年 | 50篇 |
1977年 | 40篇 |
1976年 | 40篇 |
1975年 | 37篇 |
1974年 | 46篇 |
1973年 | 39篇 |
1971年 | 28篇 |
1969年 | 35篇 |
1967年 | 29篇 |
排序方式: 共有3315条查询结果,搜索用时 15 毫秒
41.
Research investigating social values in interdependency situations has generally demonstrated age differences across the 5- to 10-year-old age range. However, the precise nature of these differences is unclear. Further, the differences in the social values of adults and children has not been addressed. The present study examined the social values of undergraduates and children using a measurement technique designed to allow an accurate inference of social values. Ninety-one 6- to 10-year-old children and 100 undergraduates rated the desirability of a set of outcomes which systematically varied with regard to the benefits to themselves and another person. Theoretically specified characteristics of the outcomes were then used to generate a regression equation predicting the desirability ratings separately for each individual. These regression equations were then clustered into groups of individuals who used decision rules characteristic of the major social values. The results indicate that the 8- to 10-year-old children, compared to the 6- to 7-year olds, more often expressed a social value involving equality and tended to less often express a social value involving superiority. Comparison of the social values expressed by the children and adults indicated that the adults more often expressed group-enhancement and individualism social values and less often expressed a social value involving superiority. 相似文献
42.
43.
According to single channel theory, the ability of humans to perform concurrent mental operations is limited by the capacity of a central mechanism. The theory was developed by analogy with early computers which had a single central processing unit and required sequential processing. These limitations are not likely to be properties of the mind. But now computers have begun to employ extensive concurrent processing, because of the decreasing cost of the necessary hardware. In this review we will try to bring the computer analogy up to date. Theoretical issues important for concurrent systems may be of interest to psychologists and have applications to such problems as the speed-accuracy trade-off. Several hypotheses about the way signals gain access to the central mechanism are reviewed. Recent variations of the single channel theory are discussed, including the hypotheses that more than one process can use the central mechanism at a time, and that some processes do not use the central mechanism and can be executed concurrently with those that do. In addition, relevant concepts from scheduling theory and operating systems theory are introduced and difficulties encountered by concurrent systems, namely complexity, deadlocks, and thrashing, are discussed. 相似文献
44.
Judith M Harackiewicz George Manderlink 《Journal of experimental social psychology》1984,20(6):531-551
In this study, the effects of performance-contingent rewards on intrinsic motivation were examined in comparison to no-reward controls receiving identical performance feedback. A path analytic process analysis was conducted to examine the mediation of reward effects on subsequent task interest. It was hypothesized that competence valuation, or the personal importance of doing well, would be an important mediator of interest in situations where performance feedback was available. Rewards were predicted to affect interest by influencing an individual's valuation of competence, and by altering the competence valuation mediation process. In addition, achievement orientation was hypothesized to interact with reward in affecting importance and the mediation process. Prior to performing an interesting puzzle, high school students were offered a performance-contingent reward, and then indicated how personally important it was to do well. After doing three puzzles, all subjects received positive feedback regarding their performance. Multiple regression analyses indicated that importance was affected by the experimental variables, and had a positive causal impact on subsequent intrinsic motivation. It was found that the promise of performance-contingent reward positively affected importance for low achievers relative to high achievers, and that the mediation of subsequent intrinsic interest by importance differed according to reward by achievement combinations. Additionally, a direct effect revealed that performance-contingent rewards significantly enhanced interest, relative to no-reward controls receiving identical performance feedback. 相似文献
45.
The relationship between reinforcer amount and daytime smoking reduction in smokers offered money for reduced afternoon breath carbon monoxide (CO) levels was examined. Twenty-three hired regular smokers with average baseline CO levels of about 30 ppm were exposed in random order to five sliding scale payment schedules that changed daily or weekly. Money was available for afternoon CO readings between 0 and 21 ppm with pay amount inversely related to the absolute CO reading obtained. Maximum pay amount for readings below 7 ppm varied among $0, $1.50, $3, $6, and $12 per day. Contingent reinforcement promoted CO and daytime cigarette reduction within individuals with the amount of behavior change related to the amount of payment available. Average CO levels decreased from 30 to 15 ppm as a function of pay amount whereas self-reported daytime cigarettes decreased from 12 to 5 per day. Average minutes of cigarette abstinence prior to the afternoon study contact increased from 62 to 319 minutes as a function of pay amount, whereas the percentage of available money earned increased from 22% to 48%. Nontargeted evening cigarette use also decreased during periods of daytime smoking reduction. The orderly effects of this contingent reinforcement intervention on daytime smoking of regular smoker volunteers suggest that this is a sensitive model for continued evaluation of factors that influence smoking reduction and cessation. 相似文献
46.
This study was designed to determine possible differences in the cognitive, perceptual, and personal-social development of prematurely and maturely born 3-yr.-olds which might foreshadow later learning problems. The subjects were 40 prematurely born graduates of a neonatal intensive care unit (birth weight less than 2,500 gm, less than 37 wk. gestation) matched on the pair-level with full-term controls on sex, race, post-conceptual age, and socioeconomic background. All subjects were singletons and parity was matched at the group level. No differences were found between the groups on tests of higher mental processes including the General Cognitive, Verbal, Quantitative, and Memory Scales of the McCarthy Scales of Children's Abilities, and researcher-devised measures of problem-solving competence. No differences in parental reports of personal-social development were noted. Prematures did not perform as well as controls on perceptual performance tasks, and this difference was interpreted as reflecting relatively impaired visual-motor coordination. 相似文献
47.
Ann Jacob 《The Ecumenical review》2023,75(1):82-83
This is the text of the youth testimony at the opening prayer of the 11th Assembly of the World Council of Churches on 31 August 2022. 相似文献
48.
Michael Lee Wood Grace Soelberg Jacob S. Rugh 《Journal for the scientific study of religion》2023,62(Z1):105-123
The work of W.E.B. Du Bois highlights the significance of Christian religion in Black American life. According to Du Bois, the Black Church serves as a site of self-formation and affirmation, and the White Church as a source of racist beliefs and justifications for inequality. In this paper, we expand Du Bois’ inquiry about the influence of religion with a study of Black Americans who belong to a predominantly White religion. For those whose religious experience is almost wholly within the “white world,” what role does religion play in their lives? We analyze a set of 52 public accounts by Black Americans discussing their experiences as members of the Church of Jesus Christ of Latter-day Saints (LDS). We find that for many Black LDS, membership in the LDS Church is characterized by contrast and contradiction, yielding spiritual conviction, joy, and meaningful communion on one hand, and racism and isolation on the other. We also find that Black LDS respond to these contradictions in a variety of ways. We classify these agentic responses into five types and examine the sociological significance of the observed variation. We conclude with a discussion of implications for scholarship on race and religion. 相似文献
49.
50.
Farnaz Kaighobadi Jacob Shane Erika Y. Niwa Tanzina Ahmed Laura C. Reigada 《Social and Personality Psychology Compass》2023,17(8):e12790
COVID-19 vaccine concerns remain high among Americans. Although recent studies have investigated the sociodemographic disparities in vaccine concerns, less attention has been given to reasons for vaccine skepticism and psychosocial factors that may explain it. The current study examined specific types of vaccine concerns among a diverse sample of college students (N = 1985) living in New York City. Participants who identified as Black, younger, with later immigrant generational status, and those with more conservative political leanings reported more vaccine concerns. Concerns regarding vaccine side effects were the most frequently reported source of concern. Reason for getting vaccinated, personal experiences with COVID, and COVID stress was also associated with vaccine concerns. Study results emphasize the importance of sociodemographic factors and COVID knowledge and stress in examining and addressing vaccine concerns. 相似文献