全文获取类型
收费全文 | 85972篇 |
免费 | 3486篇 |
国内免费 | 37篇 |
出版年
2020年 | 1019篇 |
2019年 | 1218篇 |
2018年 | 1707篇 |
2017年 | 1791篇 |
2016年 | 1836篇 |
2015年 | 1310篇 |
2014年 | 1585篇 |
2013年 | 7229篇 |
2012年 | 2918篇 |
2011年 | 2916篇 |
2010年 | 1813篇 |
2009年 | 1814篇 |
2008年 | 2561篇 |
2007年 | 2566篇 |
2006年 | 2297篇 |
2005年 | 1981篇 |
2004年 | 1967篇 |
2003年 | 1872篇 |
2002年 | 1828篇 |
2001年 | 2754篇 |
2000年 | 2584篇 |
1999年 | 1986篇 |
1998年 | 938篇 |
1997年 | 846篇 |
1996年 | 887篇 |
1995年 | 832篇 |
1994年 | 809篇 |
1993年 | 816篇 |
1992年 | 1652篇 |
1991年 | 1501篇 |
1990年 | 1540篇 |
1989年 | 1420篇 |
1988年 | 1431篇 |
1987年 | 1324篇 |
1986年 | 1323篇 |
1985年 | 1327篇 |
1984年 | 1139篇 |
1983年 | 1027篇 |
1979年 | 1222篇 |
1978年 | 883篇 |
1975年 | 983篇 |
1974年 | 1096篇 |
1973年 | 1147篇 |
1972年 | 937篇 |
1971年 | 887篇 |
1970年 | 779篇 |
1969年 | 805篇 |
1968年 | 1012篇 |
1967年 | 908篇 |
1966年 | 799篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
931.
Examined relapse rates in those individuals who have experienced an episode of unipolar depression as a function of the number of previous episodes, gender, age at onset of the episode (less than 40 vs. greater than 40), time since a previous episode, and depression level at time of interview. From of 6,742 participants, 2,046 were interviewed; of these, 1,130 had at least one, 513 reported a second and 173 reported a third episode. The probability for relapse was positively related to number of previous episodes, being female, depression level at time of interview, but not to age at onset (less than 40 vs. greater than 40). Women were also more likely to have more severe episodes. Participants with elevated depression symptoms reported a greater number of previous episodes. Following the first episode, there was a decline in hazard rate for men but not women; following the second episode, there was no change in vulnerability for men; for women, the results were ambiguous. 相似文献
932.
Nancy Eisenberg Paul A. Miller Mark Schaller Richard A. Fabes Jim Fultz Rita Shell Cindy L. Shea 《Journal of personality》1989,57(1):41-67
The purposes of this study were (a) to examine the role of social evaluative concerns in the self-report of sympathy and in the relation of sympathy to helping; and (b) to determine the role of "altruistic personality" traits and situationally induced vicarious emotional responses in the intention to help. Dispositional and situational self-reports of sympathy and other vicarious emotional reactions were obtained for persons who also were given the opportunity to assist a needy other. Moreover, dispositional measures of concern with social evaluation and an altruistic orientation were obtained, and a bogus pipeline manipulation was instituted for half the study participants. Both dispositional and situational self-reported sympathy were positively related to helping, as were other personality indices viewed as reflecting altruistic characteristics. The relations for the dispositional indices of sympathy were not due solely to social evaluative concerns or to other egoistic concerns. The effects on intended helping of dispositional sympathy, perspective taking, and the tendency to ascribe responsibility for others to the self appeared to be both direct and mediated by situational sympathetic responding. Finally, situational sadness did not mediate the effects of sympathetic responsiveness. 相似文献
933.
934.
935.
Rater bias in the EASI temperament scales: a twin study 总被引:1,自引:0,他引:1
Under trait theory, ratings may be modeled as a function of the temperament of the child and the bias of the rater. Two linear structural equation models are described, one for mutual self- and partner ratings, and one for multiple ratings of related individuals. Application of the first model to EASI temperament data collected from spouses rating each other shows moderate agreement between raters and little rating bias. Spouse pairs agree moderately when rating their twin children, but there is significantly rater bias, with greater bias for monozygotic than for dizygotic twins. MLE's of heritability are approximately .5 for all temperament scales with no common environmental variance. Results are discussed with reference to trait validity, the person-situation debate, halo effects, and stereotyping. Questionnaire development using ratings on family members permits increased rater agreement and reduced rater bias. 相似文献
936.
Objective indices (heart rate, perspiration quantity, finger plethysmograph curves, and facial expression) and subjective indices (sensory and emotional subject reports) were recorded for 25 young Chinese adults (16 men, 9 women) during and after the simultaneous application of a strong pain stimulus and either foot classical (alloneural points Tsusanli and Yanglingchuan) or hand classical (alloneural points Hegu and Neiguan) acupuncture. Both forms of acupuncture were equally effective, showing that stimulation of the same nerve is not essential for pain relief. Acupuncture assuaged the emotional, but not the sensory, response to the painful stimulation. 相似文献
937.
Twenty-eight boys and 28 girls at each of the Piagetian preoperational, concrete operational, and formal operational cognitive stages were given an interview focusing on their concepts of family. Half of each group were from intact families, and half were from divorced families. Interviews were scored for two structural aspects of the concept of family: conceptual level, and use of dimensions that structure the concept. The complexity of children's concepts was strongly related to cognitive stage and, to a lesser degree, to sex. Frequency of use of concept dimensions was strongly affected by general developmental level, though not specifically cognitive stage, and by intactness of family, but to a lesser degree by sex. Specific information is provided on the effect of these factors on perceptions of family composition, parental roles, and breadth of family activities. 相似文献
938.
Diane M. Morrison 《Journal of applied social psychology》1989,19(17):1431-1452
The relationship of knowledge and attitudes to adolescent contraceptive efficacy was investigated in a multivariate study, with demographic and sexual history variables covaried. Subjects were unmarried, sexually active 15- to 19-year-old women. Two studies were conducted: one using a large and representative sample and the second using a smaller, high socioeconomic status sample that is more typical of samples generally used in earlier research. Subjects were classified as effective, ineffective, or nonusers of contraception, based on both frequency of use and effectiveness of the method(s) they used. Two discriminant function analyses were performed to determine (a) whether knowledge and attitudes contributed to discrimination among the groups over and above discrimination attributable to demographic and sexual history variables, and (b) which variables distinguished ineffective users from both other groups. The results of both studies indicate that attitudes, particularly attitudes toward contraception, are strong predictors of patterns of contraceptive use. Ineffective users were distinguished from nonusers by their greater knowledge of contraception, and from both other groups by their greater sexual activity and more positive attitudes toward intercourse. The discussion focuses on the theoretical implications of the results, the usefulness of the effective/ineffective/nonuser categorization, and applications of these findings to design of interventions. 相似文献
939.
940.
H. Russell Searight Ph.D. Mary Graham M.S. Lynn Rae M.S.W. A.C.S.W. Melinda Parker M.A. 《Journal of Contemporary Psychotherapy》1989,19(2):109-116
There is increased evidence that infants who receive poor quality social stimulation from their primary caregiver are at risk for later developmental difficulties. This paper describes a preventive intervention for mother-infant dyads exhibiting impaired patterns of social interaction. An impaired relationship with the primary caregiver has been found to be associated with social and emotional deficits in early childhood as well as with significant psychopathology in adulthood. The intervention consisted of group treatment of mothers and their infants. Each group session has 4 subsections which, together, were directed towards improving the mothers' ability to relate in a stimulating and nurturant manner to their children. Types of intervention included didactic instruction, modeling, and interpretation of the infant's behavior. Qualitative data suggested that the group intervention has positive effects on the mother-infant dyads. 相似文献