全文获取类型
收费全文 | 69386篇 |
免费 | 2641篇 |
国内免费 | 23篇 |
专业分类
72050篇 |
出版年
2019年 | 738篇 |
2018年 | 1057篇 |
2017年 | 1025篇 |
2016年 | 1163篇 |
2015年 | 852篇 |
2014年 | 1001篇 |
2013年 | 5719篇 |
2012年 | 1841篇 |
2011年 | 1844篇 |
2010年 | 1184篇 |
2009年 | 1124篇 |
2008年 | 1714篇 |
2007年 | 1614篇 |
2006年 | 1453篇 |
2005年 | 1310篇 |
2004年 | 1244篇 |
2003年 | 1200篇 |
2002年 | 1196篇 |
2001年 | 2181篇 |
2000年 | 2112篇 |
1999年 | 1571篇 |
1998年 | 731篇 |
1996年 | 769篇 |
1995年 | 719篇 |
1994年 | 727篇 |
1992年 | 1582篇 |
1991年 | 1447篇 |
1990年 | 1451篇 |
1989年 | 1282篇 |
1988年 | 1267篇 |
1987年 | 1249篇 |
1986年 | 1273篇 |
1985年 | 1311篇 |
1984年 | 1091篇 |
1983年 | 966篇 |
1982年 | 709篇 |
1981年 | 717篇 |
1979年 | 1135篇 |
1978年 | 785篇 |
1976年 | 724篇 |
1975年 | 995篇 |
1974年 | 1077篇 |
1973年 | 1180篇 |
1972年 | 1063篇 |
1971年 | 970篇 |
1970年 | 915篇 |
1969年 | 892篇 |
1968年 | 1142篇 |
1967年 | 1016篇 |
1966年 | 923篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
931.
932.
D A de Rosenroll 《Adolescence》1987,22(88):791-802
This paper reviews six articles which appear to be representative of the past fifteen years during which researchers have focused on early adolescent egocentrism. Each article is described in chronological order and compared to research findings suggested by the other articles. Although the researchers have suggested some interesting associations, there is a lack of consistency among their findings. The author indicates methodological problems and questions for further research which arise from the reviewed articles. 相似文献
933.
In reviewing the literature on the social impact of high school, six themes were identified: (1) students perceive strong norms for conformity to school rules, (2) the emphasis on conformity and control influences the quality of student/teacher relations which tend to be role bound and inflexible, (3) paths to social status continue to emphasize athletic competence, (4) peer group identification has an impact on social relations within the larger community as well as in the school setting, (5) powerlessness is felt as a result of the authoritarian approach to decision making, and (6) the overall high school environment does not enhance students' beliefs in the Bill of Rights. It was concluded that high school students have limited opportunities for flexible self-definition. As a result of the way they are treated by authority figures and the strong pressures toward conformity, many adolescents fail to learn the extent of their rights or effective strategies for the exercise of power. 相似文献
934.
Keeping juvenile delinquents in school: a prediction model 总被引:1,自引:0,他引:1
The purpose of this study was to test an empirically based prediction model of school dropout on a sample of 137 juvenile delinquents, some who have dropped out and some who have remained in school. The specific factors among the many found in previous research that are salient for predicting whether delinquent youths will drop out or remain in school were determined. An important finding of this study is that it required only four factors to yield a high level of prediction: misbehavior in school, disliking school, the negative influence of peers with respect to dropping out and getting into trouble, and a marginal or weak relationship with parents. The four factors identified create a model that is directly applicable to prevention strategies and is extremely parsimonious. 相似文献
935.
The Extended Objective Measure of Ego Identity Status (EOM-EIS) was examined for reliability and validity among early/middle adolescent subjects. The EOM-EIS represents a combination of the Objective Measure of Ego Identity Status and a structured interview of identity status. The instrument was designed to measure ego identity with regard to occupational, religious, political, philosophical, and social contexts along ideological and interpersonal dimensions. A total of 467 students aged 12 to 18 (median = 15.73) responded to the instrument. In general the results from the analyses of reliability, validity, demographic characteristics, and psychosocial maturity yielded results which parallel the theoretical framework and the results from college-aged subjects. 相似文献
936.
R K Mills 《Adolescence》1987,22(87):641-646
This article explores the use of fiction in the classroom as a tool for enhancing the self-understanding of adolescents. Specifically, two novels by S.E. Hinton are used as examples. Theoretical consideration as well as practical classroom activities are discussed. 相似文献
937.
R Teeter 《Adolescence》1987,22(86):253-257
The prominence of sport in the American secondary school curriculum owes much to 19th-century child development theories, the most prominent of which (Von Baer's Law) originated in embryology, the forerunner of modern psychology. Von Baer's Law held that embryonic development formed a condensed record of human development, that the embryo in the womb represented in miniature the overall organic evolution of man. The "law" held that youth passed through the same developmental gradations ontogenetically that the human race passed through phylogenetically; that youth repeated in their development approximately the development, from barbarity to civilization, of the human race. Indeed, they stood at a primitive developmental level and simply passed through a stage the human race had passed through thousands of years earlier. Von Baer's Law became a scientific rationale for sport in American schools, most particularly, football, which was believed to be spirited enough to "satisfy the racial claim" and mitigate against antisocial aggressiveness. 相似文献
938.
Psychobiological Factors Predicting the Course of Breast Cancer 总被引:3,自引:0,他引:3
Mogens R. Jensen 《Journal of personality》1987,55(2):317-342
Drawing on a carefully controlled sample of 52 women with a history of breast carcinoma and 34 healthy controls, this prospective study examined empirical associations between psychological factors and the progression of neoplastic disorders over a follow-up period averaging 624 days. Psychological variables were psychometrically assessed by self-report measures. A multiple regression analysis which controlled for disease stage at original diagnosis, age, total length of disease course, hematological factors, and blood chemistries measured at study onset showed neoplastic spread to be associated with a repressive personality style, reduced expression of negative affect, helplessness-hopelessness, chronic stress, and comforting daydreaming. The identified model of medical and psychological variables accounted for 56% of the observed variance. A psychobiological model of brain-body disregulation provided the best account of the observed associations between psychological functioning and the progression of disease. Future research is necessary to examine the role which psychological functioning may exert upon health-relevant behaviors that might blunt the benefits of professional health care. 相似文献
939.
Using a backward-masking paradigm with a bias-free and ceiling-free psychophysical task, we tested hypnotized and control subjects for speed of visual information processing. Approximately half of each group received visual imagery suggestions in an attempt to influence attention. Imagery produced no significant differential effect. Although an absence of a hypnotizability-performance relationship was in keeping with findings of a previous study, those subjects in the present study who performed under hypnosis were, as a group, significantly superior to the other subjects in speed of information processing. 相似文献
940.
V D Lutzer 《The Journal of general psychology》1987,114(3):273-279
A match-to-sample task and a preference-ranking procedure were used to provide predifferentiation experiences on a color discrimination of 3-, 4-, 5-, and 6-year-old children. Chronological age was the best predictor of task success. Six-year-olds averaged twice as many correct matches as 3-year-olds. Gender and predifferentiation experience were not significant as main effects or in interactions affecting test performance. There was no difference between scores of untrained and trained children. The predifferentiation experiences had no effect. The data suggest that the years between 3 and 6 may be an important period in the development of the perceptual abilities needed to discriminate among subtle differences in one hue. Boys' and girls' abilities seem to develop at the same rate during this age span. 相似文献