全文获取类型
收费全文 | 76039篇 |
免费 | 2336篇 |
国内免费 | 32篇 |
出版年
2020年 | 695篇 |
2019年 | 838篇 |
2018年 | 4330篇 |
2017年 | 3663篇 |
2016年 | 3297篇 |
2015年 | 1052篇 |
2014年 | 1143篇 |
2013年 | 5115篇 |
2012年 | 2403篇 |
2011年 | 4236篇 |
2010年 | 3544篇 |
2009年 | 2574篇 |
2008年 | 3389篇 |
2007年 | 3772篇 |
2006年 | 1646篇 |
2005年 | 1707篇 |
2004年 | 1624篇 |
2003年 | 1439篇 |
2002年 | 1441篇 |
2001年 | 1879篇 |
2000年 | 1757篇 |
1999年 | 1376篇 |
1998年 | 764篇 |
1997年 | 674篇 |
1996年 | 600篇 |
1995年 | 580篇 |
1994年 | 558篇 |
1993年 | 583篇 |
1992年 | 1081篇 |
1991年 | 1019篇 |
1990年 | 999篇 |
1989年 | 877篇 |
1988年 | 847篇 |
1987年 | 836篇 |
1986年 | 846篇 |
1985年 | 905篇 |
1984年 | 713篇 |
1983年 | 624篇 |
1982年 | 504篇 |
1979年 | 691篇 |
1978年 | 535篇 |
1976年 | 493篇 |
1975年 | 629篇 |
1974年 | 661篇 |
1973年 | 621篇 |
1972年 | 554篇 |
1971年 | 501篇 |
1968年 | 571篇 |
1967年 | 552篇 |
1966年 | 505篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
Emma C. Spiel Rachel F. Rodgers Susan J. Paxton Eleanor H. Wertheim Stephanie R. Damiano Karen J. Gregg Siân A. McLean 《The British journal of developmental psychology》2016,34(2):198-211
Our aim was to explore the role of parents in the transmission of stereotypical body size attitudes and awareness of weight loss strategies to preschool children. Participants were 279 3‐year‐old children and their parents, who provided data at baseline and 1 year later. Parents completed self‐report body size attitude and dieting measures. Child weight bias and awareness of weight loss strategies were assessed through interview. Over time, negative associations with large bodies and awareness of weight loss strategies increased. Fathers’ attitudes prospectively predicted boys’ weight bias and awareness of weight loss strategies. Among girls, parental attitudes were less predictive. Findings confirm the importance of fathers in the development of boys’ body attitudes and inform prevention programmes. 相似文献
22.
A. S. Cua 《Journal of Chinese Philosophy》2000,27(3):269-285
23.
24.
L T Connor D A Balota J H Neely 《Journal of experimental psychology. Learning, memory, and cognition》1992,18(3):544-554
Experiment 1 replicated Yaniv and Meyer's (1987) finding that lexical decision and episodic recognition performance was better for words previously yielding high-accessibility levels (a combination of feeling-of-knowing and tip-of-the-tongue ratings) in comparison with those yielding low-accessibility levels in a rare word definition task. Experiment 2 yielded the same pattern even though lexical decisions preceded accessibility estimates by a full week. Experiment 3 dismissed the possibility that the Experiment 2 results may have been due to a long-term influence from the lexical decision task to the rare word judgment task. These results support a model in which Ss (a) retrieve topic familiarity information in making accessibility estimates in the rare word definition task and (b) use this information to modulate lexical decision performance. 相似文献
25.
Thomas A Wills Velma McBride Murry Gene H Brody Frederick X Gibbons Meg Gerrard Carmella Walker Michael G Ainette 《Health psychology》2007,26(1):50-59
OBJECTIVE: To test a theoretical model of how ethnic pride and self-control are related to risk and protective factors. DESIGN: A community sample of 670 African American youth (mean age = 11.2 years) were interviewed in households. MAIN OUTCOME MEASURES: Measures of cigarette smoking, alcohol use, and sexual behavior (lifetime to past month). RESULTS: Structural modeling analyses indicated parenting was related to self-control and self-esteem, and racial socialization was related to ethnic pride. Self-control and self-esteem variables were related to levels of deviance-prone attitudes and to perceptions of engagers in, or abstainers from, substance use and sexual behavior. The proximal factors (behavioral willingness, resistance efficacy, and peer behavior) had substantial relations to the criterion variables. Participant gender and parental education also had several paths in the model. Results were generally similar for the 2 outcome behaviors. CONCLUSIONS: In this population, self-esteem and self-control are related to parenting approaches and have pathways to attitudes and social perceptions that are significant factors for predisposing to, or protecting against, early involvement in substance use and sexual behavior. 相似文献
26.
Most studies of suicide in younger patients have demonstrated significant alterations in the serotonin system. Although a high percentage of completed suicides occur in late-life, to date very few studies of the biology of suicide have focused on this age group. This chapter describes age-related changes in the central nervous system pertinent to the biology of suicide, then reviews post-mortem biological studies of the brains of suicides and suicide attempters. As suicide attempts in the elderly are characterized by the use of violent means, biologic studies of impulsive violence are discussed. Finally we describe data on the effect of degenerative diseases on the serotonin system and the possible link to increased suicidal behavior in affected patients. This review underscores the need for further study of the biology of suicide in the geriatric age group. 相似文献
27.
Michael Schwartze Rachel M. Brown Emmanuel Biau Sonja A. Kotz 《International journal of psychology》2020,55(3):342-346
The informative value of time and temporal structure often remains neglected in cognitive assessments. However, next to information about stimulus identity we can exploit temporal ordering principles, such as regularity, periodicity, or grouping to generate predictions about the timing of future events. Such predictions may improve cognitive performance by optimising adaptation to dynamic stimuli. Here, we investigated the influence of temporal structure on verbal working memory by assessing immediate recall performance for aurally presented digit sequences (forward digit span) as a function of standard (1000 ms stimulus-onset-asynchronies, SOAs), short (700 ms), long (1300 ms) and mixed (700–1300 ms) stimulus timing during the presentation phase. Participant's digit spans were lower for short and mixed SOA presentation relative to standard SOAs. This confirms an impact of temporal structure on the classic “magical number seven,” suggesting that working memory performance can in part be regulated through the systematic application of temporal ordering principles. 相似文献
28.
Parents who experienced infertility have increasingly used medically assisted reproduction (MAR) to add children to their families over the past few decades. These parents will need to decide if they will tell their children about being conceived using MAR. Although MAR information sharing operates within family contexts, little is known about the role of conversation orientation—one family contextual factor—in child outcomes associated with MAR information sharing in middle childhood. Derived from the Family Communication Patterns Theory, this study proposes that conversation orientation moderates the associations between MAR information sharing and children's psychosocial adjustment. This proposal was tested using a sample of 81 6- to 12-year-old MAR-conceived children from 55 families and a structured observational measure of conversation orientation. Multiple regression analyses showed that MAR information sharing interacted with conversation orientation to influence children's behavioral and attention problems but not emotional problems. In families with high conversation orientation, MAR information sharing was not significantly associated with children's behavioral and attention problems. In families with low conversation orientation, MAR information sharing was significantly associated with an increase in children's behavioral and attention problems. Results of this exploratory study demonstrate the potential significance of general communication orientation in understanding child outcomes of MAR information sharing and highlight the needed family context nuances in MAR research. 相似文献
29.
Kaitlin S. Curtis Kara L. Forck Megan A. Boyle Brittany M. Fudge Heather N. Speake Benjamin P. Pauls 《Journal of applied behavior analysis》2020,53(2):635-648
We evaluated the viability of an interview-informed synthesized-contingency analysis (IISCA) conducted in a trial-based format with 3 children with autism spectrum disorders who engaged in problem behavior. We compared results to those from typical trial-based and traditional functional analyses and found high degrees of correspondence. The trial-based IISCA format took the least amount of time to conduct and was associated with the lowest frequencies of problem behavior. Results are discussed in terms of merits of each of the 3 types of functional analysis arrangements and directions for future research. 相似文献
30.