全文获取类型
收费全文 | 436篇 |
免费 | 95篇 |
国内免费 | 52篇 |
出版年
2024年 | 2篇 |
2023年 | 10篇 |
2022年 | 21篇 |
2021年 | 14篇 |
2020年 | 26篇 |
2019年 | 22篇 |
2018年 | 32篇 |
2017年 | 36篇 |
2016年 | 31篇 |
2015年 | 20篇 |
2014年 | 25篇 |
2013年 | 73篇 |
2012年 | 17篇 |
2011年 | 18篇 |
2010年 | 18篇 |
2009年 | 14篇 |
2008年 | 19篇 |
2007年 | 22篇 |
2006年 | 30篇 |
2005年 | 27篇 |
2004年 | 20篇 |
2003年 | 17篇 |
2002年 | 13篇 |
2001年 | 7篇 |
2000年 | 8篇 |
1999年 | 4篇 |
1998年 | 12篇 |
1997年 | 5篇 |
1996年 | 2篇 |
1995年 | 4篇 |
1994年 | 2篇 |
1993年 | 1篇 |
1992年 | 1篇 |
1991年 | 2篇 |
1990年 | 1篇 |
1987年 | 1篇 |
1985年 | 2篇 |
1982年 | 1篇 |
1977年 | 1篇 |
1975年 | 2篇 |
排序方式: 共有583条查询结果,搜索用时 15 毫秒
231.
We describe the incidence and coincidence of depression and high ability in a sample of Virginia's incarcerated delinquent youth population. Specifically, 207 incarcerated juveniles were assessed with the Raven's Advanced Progressive Matrices and the Children's Depression Inventory (CDI). The data indicated there were as many high ability juveniles in detention settings as would be expected in a regular population. Results from the CDI identified 37% as at risk for clinical depression. Cross-tabulation of the data indicated a significant relationship between high ability and depression in the delinquent population. In addition, the findings indicated that the presence of depression is related to the ability level of the juvenile. That high ability delinquents may be more vulnerable to depression argues that the coincidence of these conditions requires consideration. Based upon these findings, and given the high correlation suicide has with depression, we suggest that screening for depression should be mandatory for incarcerated delinquents. 相似文献
232.
M. Meyer M.D. Ph.D. A. Rahmel C. Marconi B. Grassi P. Cerretelli J. E. Skinner 《Integrative psychological & behavioral science》1998,33(4):344-362
Recent studies of nonlinear dynamics of the long-term variability of heart rate have identified nontrivial long-range correlations
and scale-invariant power-law characteristics (1/f noise) that were remarkably consistent between individuals and were unrelated to external or environmental stimuli (Meyer
et al., 1998a). The present analysis of complex nonstationary heartbeat patterns is based on the sequential application of
the wavelet transform for elimination of local polynomial nonstationary behavior and an analytic signal approach by use of
the Hilbert transform (Cumulative Variation Amplitude Analysis). The effects of chronic high altitude hypoxia on the distributions
and scaling functions of cardiac intervals over 24 hr epochs and 4 hr day/nighttime subepochs were determined from serial
heartbeat interval time series of digitized 24 hr ambulatory ECGs recorded in 9 healthy subjects (mean age 34 yrs) at sea
level and during a sojourn at high altitude (5,050 m) for 34 days (Ev-K2-CNR Pyramid Laboratory, Sagarmatha National Park,
Nepal). The results suggest that there exists a hidden, potentially universal, common structure in the heterogeneous time
series. A common scaling function with a stable Gamma distribution defines the probability density of the amplitudes of the
fluctuations in the heartbeat interval time series of individual subjects. The appropriately rescaled distributions of normal
subjects at sea level demonstrated stable Gamma scaling consistent with a single scaled plot (data collapse). Longitudinal
assessment of the rescaled distributions of the 24 hr recordings of individual subjects showed that the stability of the distributions
was unaffected by the subject’s exposure to a hypobaric (hypoxic) environment. The rescaled distributions of 4 hr subepochs
showed similar scaling behavior with a stable Gamma distribution indicating that the common structure was unequivocally applicable
to both day and night phases and, furthermore, did not undergo systematic changes in response to high altitude. In contrast,
a single function stable over a wide range of time scales was not observed in patients with congestive heart failure or patients
after cardiac transplantation. The functional form of the scaling in normal subjects would seem to be attributable to the
underlying nonlinear dynamics of cardiac control. The results suggest that the observed Gamma scaling of the distributions
in healthy subjects constitutes an intrinsic dynamical property of normal heart function that would not undergo early readjustment
or late acclimatization to extrinsic environmental physiological stress, e.g., chronic hypoxia. 相似文献
233.
身体锻炼对高中学生主观幸福感的影响及其心理机制 总被引:5,自引:0,他引:5
为了考察身体锻炼与高中学生主观幸福感的关系,采用量表法进行了研究,控制了相关变量后的研究结果表明:(1)经常锻炼的高中学生比锻炼不足的高中学生的主观幸福感更加强烈,这一差异表现在两者之间的情感成份和特殊生活满意感上;一次的身体锻炼对高中学生主观幸福感没有影响,长期性的身体锻炼可以提高高中学生主观幸福感;小锻炼量和中等锻炼量的身体锻炼随着锻炼持续时间的增长,对高中学生主观幸福感影响加深,而大锻炼量随着锻炼持续时间的增长对高中学生主观幸福感的影响,呈现倒“V”型的曲线状;随着锻炼持续时间的增长,中等锻炼量的效果明显优于小锻炼量和大锻炼量的效果;(2)身体锻炼不仅可以直接对高中学生主观幸福感产生影响,而且可以通过身体自尊,人际关系、人格等中介变量对高中学生主观幸福感产生影响 相似文献
234.
初中生数学学习策略的可控心理影响机制 总被引:1,自引:0,他引:1
运用问卷调查和访谈的方法,探讨了主要可控心理因素对初中生数学学习策略的影响机制。结果表明,所纳入的可控心理因素具有良好的代表性;可控心理因素对初中生数学学习策略的影响机制主要体现为数学学习动机、策略意识、积极归因和困难应对感对数学学习策略有显著的直接效应。研究提示,数学学习策略的教学应重视可控心理因素的作用并处理好各因素之间的关系。 相似文献
235.
中学生师生关系的结构、类型及其发展特点 总被引:7,自引:0,他引:7
选取319名初一至高三学生作为被试,主要采用问卷法,考察中学生师生关系的结构、类型及其发展特点。结果表明:(1)师生关系结构具有冲突性、依恋性、亲密性和回避性四个维度;(2)师生关系类型包括矛盾冲突型、亲密和谐型和疏远平淡型三种类型;(3)师生关系各维度不存在显著性别差异,但存在显著年级差异,师生关系质量随年级升高呈波浪式下降趋势,初一学生的师生关系最好,初二和高二学生的师生关系最不理想;(4)师生关系各类型的人数比例存在显著年级差异。 相似文献
236.
This article describes typologies of couples in high‐conflict divorces and explores their dynamics through the prism of family systems and British object relations theories. The article argues that couples embroiled in high‐conflict divorce often have primitive object relations. They tend to use splitting and projection processes and find it difficult to tolerate ambivalence or disagreement. Fear of the ex‐spouse's retaliation is often accompanied by fear of their own destructiveness and by a wish to make reparation. However, it seems that reparation attempts in primitive object relations rarely achieve reconciliation. A case study demonstrates the complicated dynamics of these couples. Clinical recommendations are made. 相似文献
237.
238.
本研究采用潜在剖面分析技术探究高中生成就目标的特征模式及学业适应。被试为732名来自北京、广东、福州和西安各一所高中的高一学生,本研究采用问卷法收集学生的成就目标取向、学习效能、学业自我阻碍、学习策略和考试焦虑的数据。结果发现:(1)学生中存在成功导向、学业淡漠、典型掌握导向和非典型掌握导向四种类型,其中,典型和非典型掌握导向型所占比例较高,成功导向型和学业淡漠型所占比例较低;(2)成功导向组学生在学习效能、学习策略、学业自我阻碍和考试焦虑上的得分最高,学业淡漠组在各学业适应指标上得分最低,典型和非典型掌握导向组得分处于成功导向组和学业淡漠组中间。本研究结果对预防和干预学业适应不良具有重要意义。 相似文献
239.
初中生心理健康问题的检出率在诸多研究中存在很大分歧, 未能为心理健康政策制定和服务体系建设提供充分依据。为明确心理健康问题的整体检出率并澄清其影响因素, 对2010~2020年检索到的文献进行了元分析。结果发现, 初中生面临不同程度的心理健康问题, 其中焦虑、抑郁和自我伤害检出率排在前三位; 初中生心理健康问题随年代发展呈恶化趋势, 其中焦虑和自杀企图尤为明显; 初中生心理健康问题检出率饱受测量工具、检出标准和检出时间不统一的影响; 初中生心理健康问题检出率整体上随年级而增加, 其中焦虑尤为明显; 女生的心理健康问题检出率高于男生, 自杀尤为明显; 中西部地区的初中生比东北和东部地区更容易出现心理健康问题, 尤其是焦虑和自我伤害。未来应立足中国大地研制科学的测量工具和筛查标准并建立心理健康动态监测体系和学校心理健康服务体系。 相似文献
240.
Many studies involving functional magnetic resonance imaging (fMRI) have exposed participants to paintings under varying task demands. To isolate neural systems that are activated reliably across fMRI studies in response to viewing paintings regardless of variation in task demands, a quantitative meta-analysis of fifteen experiments using the activation likelihood estimation (ALE) method was conducted. As predicted, viewing paintings was correlated with activation in a distributed system including the occipital lobes, temporal lobe structures in the ventral stream involved in object (fusiform gyrus) and scene (parahippocampal gyrus) perception, and the anterior insula—a key structure in experience of emotion. In addition, we also observed activation in the posterior cingulate cortex bilaterally—part of the brain’s default network. These results suggest that viewing paintings engages not only systems involved in visual representation and object recognition, but also structures underlying emotions and internalized cognitions. 相似文献