全文获取类型
收费全文 | 18055篇 |
免费 | 814篇 |
国内免费 | 4篇 |
出版年
2023年 | 97篇 |
2021年 | 142篇 |
2020年 | 252篇 |
2019年 | 337篇 |
2018年 | 437篇 |
2017年 | 478篇 |
2016年 | 460篇 |
2015年 | 376篇 |
2014年 | 439篇 |
2013年 | 2000篇 |
2012年 | 745篇 |
2011年 | 815篇 |
2010年 | 507篇 |
2009年 | 523篇 |
2008年 | 739篇 |
2007年 | 698篇 |
2006年 | 636篇 |
2005年 | 612篇 |
2004年 | 609篇 |
2003年 | 584篇 |
2002年 | 591篇 |
2001年 | 293篇 |
2000年 | 235篇 |
1999年 | 251篇 |
1998年 | 279篇 |
1997年 | 262篇 |
1996年 | 223篇 |
1995年 | 216篇 |
1994年 | 214篇 |
1993年 | 218篇 |
1992年 | 206篇 |
1991年 | 177篇 |
1990年 | 188篇 |
1989年 | 149篇 |
1988年 | 149篇 |
1987年 | 161篇 |
1986年 | 141篇 |
1985年 | 190篇 |
1984年 | 225篇 |
1983年 | 206篇 |
1982年 | 233篇 |
1981年 | 201篇 |
1980年 | 178篇 |
1979年 | 165篇 |
1978年 | 213篇 |
1977年 | 196篇 |
1976年 | 196篇 |
1975年 | 172篇 |
1974年 | 178篇 |
1973年 | 131篇 |
排序方式: 共有10000条查询结果,搜索用时 18 毫秒
951.
Developmental and etiological advances have set the stage for considering trajectories of problem behavior across the life course, but little work thus far addresses co-occurring problem behavior trajectories. Although recent work characterizes drinking and smoking trajectories, none has explored the course of concurrent drinking and smoking. Using panel data from the Monitoring the Future Project (N=32,087), the authors applied growth mixture modeling to 4 waves of heavy drinking and smoking in a young-adult sample. The authors extracted a single latent group membership factor from heavy drinking and smoking. Associations between trajectory classes and risk factors were relatively unique to the substance being predicted. The association of smoking with alcohol expectancies and delinquency appeared to exist by virtue of smoking's comorbidity with drinking. 相似文献
952.
Advances in genomic research are increasingly identifying genetic components in major health and mental health disorders. This article presents a Family System Genetic Illness model to address the psychosocial challenges of genomic conditions for patients and their families, and to help organize this complex biopsychosocial landscape for clinical practice and research. This model clusters genomic disorders based on key characteristics that define types of disorders with similar patterns of psychosocial demands over time. Key disease variables include the likelihood of developing a disorder based on specific genetic mutations, overall clinical severity, timing of clinical onset in the life cycle, and whether effective treatment interventions exist to alter disease onset and/or progression. For disorders in which carrier, predictive, or presymptomatic testing is available, core nonsymptomatic time phases with salient developmental challenges are described pre- and post-testing, including a long-term adaptation phase. The FSGI model builds on Rolland's Family System Illness model, which identifies psychosocial types and phases of chronic disorders after clinical onset. The FSGI model is designed to be flexible and responsive to future discoveries in genomic research. Its utility is discussed for research, preventive screening, family assessment, treatment planning, and service delivery in a wide range of healthcare settings. 相似文献
953.
Mohanty A Herrington JD Koven NS Fisher JE Wenzel EA Webb AG Heller W Banich MT Miller GA 《Journal of abnormal psychology》2005,114(1):16-27
Negatively valenced stimuli foster cognitive impairment in schizotypy and schizophrenia. To identify relevant brain mechanisms, the authors had 16 positive-schizotypy and 16 control participants perform an emotional Stroop task, judging the ink color of negative and neutral words during functional magnetic resonance imaging (fMRI) of regional brain activity. Schizotypy individuals showed increased right and decreased left activity in dorsolateral prefrontal cortex, indicating a deficit in maintenance of attentional set in the presence of negative emotional distractors. They also showed abnormal activity in ventral limbic areas, including decreased activity in nucleus accumbens and increased activity in hippocampus and amygdala, a circuit involved in the integration of cognitive and affective processes. These results indicate that aspects of emotion-cognition processes and the brain mechanisms that implement them are similar in schizotypy and schizophrenia. 相似文献
954.
Fairness heuristic theory was used to examine how information from one's peers affects an individual's interpretation of, and reactions to, an authority's subsequent behavior. Participants (N=105) overheard their peers discuss an experimenter's reputation (fair, unfair, or absent) before interacting with the experimenter who behaved more versus less fairly. Results showed that the social cues biased participants' subsequent information processing: controlling for the experimenter's behavior, interactional justice mediated the effect of social cues on retaliation. Social cues and the authority's behavior also interacted to predict retaliation. Participants who were treated less fairly retaliated more after being led to expect fair treatment than did participants who heard no prior information about the experimenter. 相似文献
955.
Assessing the feasibility of using contingency management to modify cigarette smoking by adolescents
Roll JM 《Journal of applied behavior analysis》2005,38(4):463-467
Cigarette smoking is a leading cause of preventable death in the United States. Many smokers initiate this dangerous behavior during adolescence. This report describes a contingency management intervention designed to initate and maintain a period of abstinence from cigarettes by adolescent smokers. Results suggest that the intervention was generally successful and that further investigation of this topic is warranted. 相似文献
956.
Recent research suggests that the turnover process is not fully captured by the traditional sequential model relating job dissatisfaction to subsequent turnover. The present study contributes to this research by modeling within-individual job satisfaction as a function of job change patterns to determine if individual work attitudes change systematically with the temporal turnover process. Specifically, the authors hypothesized that low satisfaction would precede a voluntary job change, with an increase in job satisfaction immediately following a job change (the honeymoon effect), followed by a decline in job satisfaction (the hangover effect). Though this pattern is suggested in the literature, no prior research has integrated and tested this complete temporal model within individuals. Findings based on a sample of managers supported the proposed honeymoon-hangover effect. 相似文献
957.
Marks MA DeChurch LA Mathieu JE Panzer FJ Alonso A 《The Journal of applied psychology》2005,90(5):964-971
The authors examined how networks of teams integrate their efforts to succeed collectively. They proposed that integration processes used to align efforts among multiple teams are important predictors of multiteam performance. The authors used a multiteam system (MTS) simulation to assess how both cross-team and within-team processes relate to MTS performance over multiple performance episodes that differed in terms of required interdependence levels. They found that cross-team processes predicted MTS performance beyond that accounted for by within-team processes. Further, cross-team processes were more important for MTS effectiveness when there were high cross-team interdependence demands as compared with situations in which teams could work more independently. Results are discussed in terms of extending theory and applications from teams to multiteam systems. 相似文献
958.
Three experiments investigated the roles of resource-sharing and intrinsic memory demands in complex working memory span performance in 7- and 9-year-olds. In Experiment 1, the processing complexity of arithmetic operations was varied under conditions in which processing times were equivalent. Memory span did not differ as a function of processing complexity. In Experiment 2, complex memory span was assessed under three conditions designed to vary both processing and intrinsic storage demands: mental arithmetic (significant attentional demands-requires storage), odd/even judgments (significant attentional demands-no storage required), and articulatory suppression (minimal attentional demands--no storage required). The highest memory spans were found in the articulatory suppression task. Span was at an intermediate level with arithmetic processing and was lowest for processing involving odd/even judgments. This difference in memory span for processing tasks involving arithmetic processing and odd/even judgments was eliminated in Experiment 3 when the pacing requirements of the arithmetic and odd/even processing tasks were equated. The results are consistent with the view that complex memory span performance is disrupted by processing activities that divert attentional resources from storage. 相似文献
959.
The authors examined the stability and dynamic structure of negative cognitions made to naturalistic stressors and the prediction of depressive symptoms in a daily diary study. Young adults reported on dispositional depression vulnerabilities at baseline, including a depressogenic cognitive style, dysfunctional attitudes, rumination, neuroticism, and initial depression, and then completed short diaries recording the inferences they made to the most negative event of the day along with their experience of depressive symptoms every day for 35 consecutive days. Daily cognitions about stressors exhibited moderate stability across time. A traitlike model, rather than a contextual one, explained this pattern of stability best. Hierarchical linear modeling analyses showed that individuals' dispositional depressogenic cognitive style, neuroticism, and their daily negative cognitions about stressors predicted fluctuations in daily depressive symptoms. Dispositional neuroticism and negative cognitive style interacted with daily negative cognitions in different ways to predict daily depressive symptoms. 相似文献
960.
Many have suggested that complementary gender stereotypes of men as agentic (but not communal) and women as communal (but not agentic) serve to increase system justification, but direct experimental support has been lacking. The authors exposed people to specific types of gender-related beliefs and subsequently asked them to complete measures of gender-specific or diffuse system justification. In Studies 1 and 2, activating (a) communal or complementary (communal + agentic) gender stereotypes or (b) benevolent or complementary (benevolent + hostile) sexist items increased support for the status quo among women. In Study 3, activating stereotypes of men as agentic also increased system justification among men and women, but only when women's characteristics were associated with higher status. Results suggest that complementary stereotypes psychologically offset the one-sided advantage of any single group and contribute to an image of society in which everyone benefits through a balanced dispersion of benefits. 相似文献