首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   2707篇
  免费   242篇
  国内免费   311篇
  3260篇
  2024年   10篇
  2023年   51篇
  2022年   51篇
  2021年   93篇
  2020年   155篇
  2019年   148篇
  2018年   160篇
  2017年   148篇
  2016年   154篇
  2015年   120篇
  2014年   133篇
  2013年   418篇
  2012年   88篇
  2011年   127篇
  2010年   75篇
  2009年   118篇
  2008年   113篇
  2007年   123篇
  2006年   108篇
  2005年   107篇
  2004年   112篇
  2003年   94篇
  2002年   74篇
  2001年   61篇
  2000年   60篇
  1999年   39篇
  1998年   35篇
  1997年   32篇
  1996年   23篇
  1995年   37篇
  1994年   22篇
  1993年   8篇
  1992年   11篇
  1991年   12篇
  1990年   8篇
  1989年   12篇
  1988年   9篇
  1987年   11篇
  1986年   6篇
  1985年   9篇
  1984年   15篇
  1983年   8篇
  1982年   13篇
  1981年   8篇
  1980年   7篇
  1979年   12篇
  1977年   4篇
  1976年   3篇
  1975年   7篇
  1974年   4篇
排序方式: 共有3260条查询结果,搜索用时 15 毫秒
241.
The ‘black hole’ is a metaphor for a reality in the psyche of many individuals who have experienced complex trauma in infancy and early childhood. The ‘black hole’ has been created by an absence of the object, the (m)other, so there is no internalized object, no (m)other in the psyche. Rather, there is a ‘black hole’ where the object should be, but the infant is drawn to it, trapped by it because of an intrinsic, instinctive need for a ‘real object’, an internalized (m)other. Without this, the infant cannot develop. It is only the presence of a real object that can generate the essential gravity necessary to draw the core of the self that is still in an undeveloped state from deep within the abyss. It is the moving towards a real object, a (m)other, that relativizes the absolute power of the black hole and begins a reformation of its essence within the psyche.  相似文献   
242.
Previous research has found a relationship between individual differences in children’s precision when nonverbally approximating quantities and their school mathematics performance. School mathematics performance emerges from both informal (e.g., counting) and formal (e.g., knowledge of mathematics facts) abilities. It remains unknown whether approximation precision relates to both of these types of mathematics abilities. In the current study, we assessed the precision of numerical approximation in 85 3- to 7-year-old children four times over a span of 2 years. In addition, at the final time point, we tested children’s informal and formal mathematics abilities using the Test of Early Mathematics Ability (TEMA-3). We found that children’s numerical approximation precision correlated with and predicted their informal, but not formal, mathematics abilities when controlling for age and IQ. These results add to our growing understanding of the relationship between an unlearned nonsymbolic system of quantity representation and the system of mathematics reasoning that children come to master through instruction.  相似文献   
243.
244.
In previous studies of attentional focus effects, investigators have measured performance outcome. Here, however, the authors used electromyography (EMG) to determine whether differences between external and internal foci would also be manifested at the neuromuscular level. In 2 experiments, participants (N = 11, Experiment 1; N = 12, Experiment 2) performed biceps curls while focusing on the movements of the curl bar (external focus) or on their arms (internal focus). In Experiment 1, movements were performed faster under external than under internal focus conditions. Also, integrated EMG (iEMG) activity was reduced when performers adopted an external focus. In Experiment 2, movement time was controlled through the use of a metronome, and iEMG activity was again reduced under external focus conditions. Those findings are in line with the constrained action hypothesis (G. Wulf, N. McNevin, & C. H. Shea, 2001), according to which an external focus promotes the use of more automatic control processes.  相似文献   
245.
246.
The distressed (Type D) personality (the combination of negative affectivity and social inhibition traits) has been associated with adverse health outcomes. This study investigated the validity of the Type D construct against the Five-Factor Model (FFM) of personality, and its association with emotional control and distress. In total 498 university students (mean age 28.9 ± 8.4 years) completed the Type D scale (DS14), and measurements for the FFM of personality, emotional control, anxiety, depression and stress. The construct validity of the Icelandic DS14 was confirmed. The Type D components negative affectivity and social inhibition were strongly associated with neuroticism and extraversion of the FFM (r = 0.82 and r = −0.67, respectively). Negative affectivity also correlated with rehearsal/rumination (r = 0.58) and social inhibition with emotional inhibition (r = 0.54), indicative of emotional control. Type D personality (40% of sample) was associated with higher levels of anxiety, depression and stress. The Type D personality components were associated with the FFM of personality, emotional control and emotional distress. Importantly, social and emotional inhibition were closely related, providing novel information about the presence of emotional inhibition within the social inhibition trait.  相似文献   
247.
Temperamental shyness emerges early in childhood and remains relatively stable throughout development and has been associated with high and low levels of the stress hormone cortisol. Studies examining the relation between shyness and cortisol have been limited because they have traditionally collected only one measure of cortisol on a single day in the laboratory, restricting the reliability and diurnal profile of the measure in the participant’s everyday environment. We collected 15 saliva samples across three separate days (i.e., upon waking, +60 min post-waking, +8 h post-waking, +10 h post-waking, and bedtime) in a sample of healthy young adults selected for high and low shyness in order to characterize a portion of the diurnal cortisol rhythm. Overall, shy individuals demonstrated relatively lower cortisol across the day and across multiple mornings than non-shy adults. Higher self-reported social anxiety across multiple measures was also related to lower total cortisol levels across all participants. The present study replicates and extends our previous findings of low salivary cortisol measured in the laboratory in shy adults to repeated measurement in their everyday environments.  相似文献   
248.
Abstract

The Creating Lasting Family Connections® (CLFC) program is designed to help improve relationship skills and reduce antisocial behaviors. Strader and colleagues propose that prosocial connectedness is responsible for program outcomes. We propose that the intersection of high agreeableness and low impulsivity represent an operational definition. We examined this definition in the context of a RCT with 246 men in prison reentry. CLFCFP increased the number of connected individuals. Being connected and the program independently impacted relationship skills, but no evidence was found to support the hypothesis that the program impacts would be more pronounced among those who were connected.  相似文献   
249.
Abstract

During the last years, different types of violence have severely damaged Mexico. In this paper we examine the consequences that violence could have in children, one of the most vulnerable segments of society. In short, we predict that exposure to any type of violence will lead to higher depression and that this could be explained through the effects of violence on childhood well-being. Our hypothesis was supported in two studies, showing that exposure to street violence (Study 1, N = 607) and exposure to collective violence (Study 2, N = 172) can increase childhood depression. Moreover, in both studies, this effect was explained by the decrease of childhood well-being caused by violence exposure. The implications of these results are discussed.  相似文献   
250.
《Estudios de Psicología》2013,34(2):179-193
Resumen

El propósito de este trabajo es analizar las propiedades psicométricas del TEOSQ, en una muestra española, aplicado al contexto de la educación física escolar. Con ello se pretende determinar si constituye un instrumento válido y fiable para utilizar en futuras investigaciones en la Educación Física. Se administró a 6170 estudiantes representativos de las provincias de Almería, Granada y Murcia de ESO y ESPO, de edades comprendidas entre 12 y 19 años. El análisis factorial confirmatorio apoyó el modelo teórico hipotetizado de dos factores (orientación a la tarea y orientación al ego) para el TEOSQ-12EF. La baja correlación entre los factores demostró la independencia de los mismos y los coeficientes alfa mostraron una consistencia interna aceptable de las dos subescalas. Las pruebas indican que existen diferencias significativas por sexo, los alumnos presentan una mayor orientación al ego que las alumnas.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号