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   4698篇
  免费   410篇
  国内免费   2篇
  5110篇
  2024年   8篇
  2023年   66篇
  2022年   32篇
  2021年   63篇
  2020年   160篇
  2019年   120篇
  2018年   173篇
  2017年   241篇
  2016年   237篇
  2015年   176篇
  2014年   194篇
  2013年   690篇
  2012年   285篇
  2011年   260篇
  2010年   165篇
  2009年   208篇
  2008年   249篇
  2007年   235篇
  2006年   189篇
  2005年   151篇
  2004年   152篇
  2003年   153篇
  2002年   129篇
  2001年   45篇
  2000年   46篇
  1999年   46篇
  1998年   55篇
  1997年   41篇
  1996年   70篇
  1995年   58篇
  1994年   40篇
  1993年   48篇
  1992年   40篇
  1991年   40篇
  1990年   36篇
  1989年   25篇
  1988年   19篇
  1987年   19篇
  1986年   16篇
  1985年   9篇
  1984年   8篇
  1983年   8篇
  1982年   10篇
  1981年   12篇
  1980年   15篇
  1979年   18篇
  1978年   21篇
  1977年   21篇
  1974年   2篇
  1971年   2篇
排序方式: 共有5110条查询结果,搜索用时 0 毫秒
891.
This paper describes the phenomenological features of early childhood onset obsessive compulsive disorder (OCD; defined as children meeting DSM-IV criteria for OCD with age of onset <8 years). Fifty-eight children (ages 4–8) were included in the sample. OCD and comorbid diagnoses were determined by structured interview, and OCD severity was measured using the Children’s Yale-Brown Obsessive Compulsive Scale (CY-BOCS). Mean age of OCD onset was almost five, and mean age of presentation was between 6 and 7. Mean symptom severity was in the moderately severe range. Comorbidity and family history of OCD were common. Contamination and aggressive/catastrophic obsessions and washing and checking compulsions were endorsed most frequently. Results indicate that early childhood onset OCD may have a lower boy to girl ratio and lower rates of depressive disorders, but may be similar to later childhood onset OCD in terms of OCD symptom presentation and severity.  相似文献   
892.
Growing research has examined parental accommodation among the families of children with obsessive-compulsive disorder (OCD). However, these studies have utilized a parent-report (PR) version of a measure, the Family Accommodation Scale (FAS) that has never received proper psychometric validation. In turn, previously derived subscales have been developed via clinical rather than empirical evidence. This study aims to conduct a comprehensive psychometric analysis of the FAS-PR utilizing data collected from 96 youths with OCD. Exploratory factors analysis was conducted and revealed a 12-item scale yielding two separate, yet related subscales, Avoidance of Triggers (AT) and Involvement in Compulsions (IC). Subsequent analyses revealed good internal consistency and convergent and discriminant validity. These findings suggest that future research should seek to examine factors that may impact various facets to accommodation as well as the role these facets plays in predicting treatment outcome. Limitations are discussed.  相似文献   
893.
The Psychological Record - The emergence of equivalence relations and the role of overall verbal competence and stimulus nameability and familiarity in this regard were investigated across 3...  相似文献   
894.
Childhood sleep problems have been associated with a range of adverse cognitive and academic outcomes, as well as increased impulsivity and emotional disorders such as anxiety and depression. The aim of the study was to examine subjective reports of sleep-related problems in children with anxiety disorders during school and weekend nights. Thirty-seven children with clinically-diagnosed anxiety disorders and 26 non-clinical children aged 7-12 years completed an on-line sleep diary to track sleep patterns across school nights and weekend nights. Anxious children reported going to bed significantly later (p = 0.03) and had significantly less sleep (p = 0.006) on school nights compared to non-anxious children. No significant differences in sleep onset latency, number of awakenings or time awake during the night, daytime sleepiness, or fatigue were found between the two groups. On the weekends, anxious children fell asleep quicker and were less awake during the night than on weeknights. School-aged anxiety disordered children showed a sleep pattern that differs from their non-anxious peers. Although the mean 30 min less sleep experienced by anxious children may initially seem small, the potential consequences on daytime performance from an accumulation of such a sleep deficit may be significant, and further investigation is warranted.  相似文献   
895.
We assessed the effects of individually defined small, medium, and large periods of presession access to edible and nonedible reinforcers on response rates during sessions in which responding produced access to identical reinforcers. Any presession access to an edible reinforcer decreased response rates for 1 participant, and small and medium periods of presession access to nonedible reinforcers resulted in similar or increased response rates for 2 participants.  相似文献   
896.
The study investigated whether gender differences in the stressor, coping strategies, and how they associate stress and copings among 875 elderly patients undergoing hemodialysis in Taiwan. Chi-square tests, MANOVA and Structural Equation Modeling were used to attain the research purposes. The results found that the women had reported higher stress in response to physical and vessel problems and higher scores in using emotion-oriented and support-seeking coping strategies, while the men reported higher stress in reproductive system functioning and higher score in using avoidance as a coping strategy. Furthermore, the results from SEM demonstrated that after controlling for patient characteristics, no statistical difference was found between the two groups with regard to their linking of stress and coping strategies.  相似文献   
897.
898.
The use of response cards during whole‐class English vocabulary instruction was evaluated. Five low‐participating students were observed during hand‐raising conditions and response‐card conditions to observe the effects of response cards on student responding and test scores and teacher questions and feedback. Responding and test scores were higher for all targeted students in the response‐card condition. The teacher asked a similar number of questions in both conditions; however, she provided more feedback in the response‐card condition.  相似文献   
899.
Participants were pretrained and tested on mutually entailed trigonometric relations and combinatorially entailed relations as they pertained to positive and negative forms of sine, cosine, secant, and cosecant. Experiment 1 focused on training and testing transformations of these mathematical functions in terms of amplitude and frequency followed by tests of novel relations. Experiment 2 addressed training in accordance with frames of coordination (same as) and frames of opposition (reciprocal of) followed by more tests of novel relations. All assessments of derived and novel formula‐to‐graph relations, including reciprocal functions with diversified amplitude and frequency transformations, indicated that all 4 participants demonstrated substantial improvement in their ability to identify increasingly complex trigonometric formula‐to‐graph relations pertaining to same as and reciprocal of to establish mathematically complex repertoires.  相似文献   
900.
The relationship between loyalty to rules and the creativity that attempts to improve those same rules was examined among Norwegian army officers deployed in international operations. Today's army officers are faced with rapidly changing work conditions and unpredictable enemies, both of which challenge and outdate rules and routines. They thus may experience that they are either guided by too few or inadequate rules, or by many rules that need to be constantly updated. Assuming that following rules is advantageous to officers, then, contrary to classical theory, it was hypothesized that officers scoring both low and high on loyalty to rules would score high on creativity. Hierarchical regression analyses revealed a significant U‐shaped relationship between loyalty to rules and creativity.  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