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   4455篇
  免费   1438篇
  2023年   7篇
  2022年   12篇
  2021年   87篇
  2020年   114篇
  2019年   416篇
  2018年   311篇
  2017年   429篇
  2016年   404篇
  2015年   361篇
  2014年   323篇
  2013年   665篇
  2012年   327篇
  2011年   261篇
  2010年   280篇
  2009年   266篇
  2008年   236篇
  2007年   176篇
  2006年   136篇
  2005年   144篇
  2004年   116篇
  2003年   128篇
  2002年   141篇
  2001年   99篇
  2000年   80篇
  1999年   44篇
  1998年   22篇
  1997年   34篇
  1996年   22篇
  1995年   14篇
  1994年   19篇
  1993年   9篇
  1992年   20篇
  1991年   17篇
  1990年   13篇
  1989年   6篇
  1988年   14篇
  1986年   7篇
  1985年   8篇
  1984年   12篇
  1983年   8篇
  1982年   11篇
  1981年   6篇
  1980年   5篇
  1979年   10篇
  1978年   7篇
  1977年   7篇
  1976年   7篇
  1975年   7篇
  1974年   10篇
  1971年   5篇
排序方式: 共有5893条查询结果,搜索用时 15 毫秒
891.
Background. Students’ perceptions of classroom goals influence their adoption of personal goals. To assess different forms of classroom goals, recent studies have favoured an overall measure of performance classroom goals, compared to a two‐dimensional assessment of performance‐approach and performance‐avoidance classroom goals (PAVCG). Aims. This paper considered the relationship between students’ perceptions of classroom goals and their endorsement of personal achievement goals. We proposed that three (instead of only two) classroom goals need to be distinguished. We aimed to provide evidence for this hypothesis by confirmatory factor analysis (CFA) and also by divergent associations between the respective classroom goal and students’ personal goal endorsement. Sample. A total of 871 (474 female) 10th grade students from several German high schools participated in this study. Method. Students responded to items assessing their perception of mastery, performance‐approach, and performance‐avoidance goals in the classroom. Additionally, the students reported how much they personally pursue mastery, performance‐approach, and performance‐avoidance goals. All items referred to German as a specific school subject. Results. A CFA yielded empirical support for the proposed distinction of three (instead of only two) different kinds of classroom goals. Moreover, in hierarchical linear modelling (HLM) analyses all three classroom goals showed unique associations with students’ personal goal adoption. Conclusions. The findings emphasized the need to distinguish performance‐approach and PAVCG. Furthermore, our results suggest that multiple classroom goals have interactive effects on students’ personal achievement strivings.  相似文献   
892.
This study evaluated a device that applied a sustained increase in accelerator pedal back force whenever drivers exceeded a preset speed criterion without buckling their seat belts. This force was removed once the belt was fastened. Participants were 6 commercial drivers who operated carpet-cleaning vans. During baseline, no contingency was in place for unbuckled trips. The pedal resistance was introduced via a multiple baseline design across groups. On the first day of treatment, the device was explained and demonstrated for all drivers of the vehicle. The treatment was associated with an immediate sustained increase in seat belt compliance to 100%. Occasionally, drivers initially did not buckle during a trip and encountered the force. In all instances, they buckled within less than 25 s. These results suggest that the increased force was sufficient to set up an establishing operation to reinforce seat belt buckling negatively. Drivers indicated that they were impressed with the device and would not drive very long unbelted with the pedal force in place.  相似文献   
893.
The researchers examined the impact of person–environment (P‐E) fit, as defined by Holland's (1997) theory, on interpersonal conflict at work (ICAW) and workplace aggression. In addition, previous relationships found in the job satisfaction literature were examined in the present sample of 244 United States employees. Internet‐based surveys were completed by 244 participants in the current research. Results of hierarchical multiple regression and correlational analyses demonstrated a negative relationship between P‐E fit and ICAW. Replication of previous relationships was found between job satisfaction, P‐E fit, and workplace aggression. Implications for P‐E fit and workplace aggression research are discussed.  相似文献   
894.
Patterns of interaction between parents and 7‐month‐old boys at familial risk for attention deficit/hyperactivity disorder (ADHD) and a comparison group were studied during a warm‐up and two play episodes. The sample included 78 (47 at‐risk, 31 comparison) mother–child and 45 (27 at‐risk, 18 comparison) father–child dyads. A coding system developed by G. Kochanska (1997, 1998) was used. Infants in the risk group did not differ from the comparison group in the rate of emission of infant‐related events. However, they received less adequate responsivity from both their fathers and their mothers to these events, and specifically to negative emotions or distress, than did the comparison group. Maternal psychopathology did not account for these findings. Mothers were more adequately responsive than were fathers, especially for physiological needs. The association between nonoptimal interaction in infancy and the development of ADHD is discussed.  相似文献   
895.
Sleep patterns of 26 seven‐week‐old boys at familial risk for attention deficit hyperactivity disorder (ADHD) and 18 control infants were compared by objective (actigraph) and subjective (maternal sleep diary) measures, over five consecutive 24‐hr periods. Actigraph findings indicated that the groups differed on stability (SD) of quiet sleep only during the day. Reports in maternal sleep diaries indicated that they also differed on stability of waking and stability of sleep duration, again only during the day. No group differences were found in terms of average scores, whether calculated for the entire 24‐hr periods, for nights, or for days. Mothers in the risk group reported that fathers were less involved in infant care than did those in the control group. These findings suggest that as early as 7 weeks of age, infants at risk for ADHD differ from controls only on stability of their sleep patterns during the day, when environmental regulatory factors are more intensive.  相似文献   
896.
This study investigates the outcome of an intervention program to establish oral feeding after prolonged tube feeding in children. The intervention is based on supervised reduction of enteral formula within a few days supported by a 3‐week program of speech therapy, occupational therapy, psychoanalytically based eating therapy, physical therapy, psychodynamic coaching, and nutritional counseling of the infant and his or her parents. Two hundred twenty‐one cases were included in this study. All patients had been severely ill or were handicapped and had been exclusively fed by tube for most of their lives. The major outcome variable was complete discontinuation of tube feeding with sufficient oral feeding after treatment, defined as the child's ability to sustain stable body weight by self‐motivated oral feeding. Two hundred three patients (92%) were completely fed orally after treatment. Tube feeding was discontinued completely within 8 days in mean, and mean in‐patient treatment time was 21.6 days. The current method can be used by a trained and experienced team to wean tube‐dependent children from prolonged tube feeding. Tube weaning should be addressed from the beginning of tube feeding in all children who are expected to restore oral feeding after the phase of nutritional stabilization. Since successful programs are rare, we were motivated to present our results of this elaborate program in this article.  相似文献   
897.
We examined the prospective associations between family socio-economic background, childhood intelligence (g) at age 11, educational and occupational attainment, and social attitudes at age 33 in a large (N = 8804), representative sample of the British population born in 1958. Structural equation Modeling identified a latent trait of ‘liberal social attitudes’ underlying attitude factors that are antiracist, socially liberal, and in support of gender equality. Another attitude factor—‘political trust’—was relatively independent from the latent attitude trait and has somewhat different pathways in relation to the other variables included in the analysis. There was a direct association between higher g at age 11 and more liberal social attitudes and political trust at age 33. For both men and women the association between g and liberal social attitudes was partly mediated via educational qualifications, and to a much lesser extent via adult occupational attainment. For women the association between g and political trust was partly mediated through both educational qualification and occupational attainment, and for men it was mediated mainly via occupational attainment. Men and women who had higher educational qualifications and higher occupational status tend to be more socially liberal and more trusting of the democratic political system. In terms of socio-economic background, people from less privileged families showed less political trust, but did not differ much in liberal social attitudes from those born into relatively more privileged circumstances. This study shows that social background, cognitive ability, education, and own social status influence perceptions of society.  相似文献   
898.
In a birth cohort of 6281 men from Aberdeen, Scotland, social class of origin, childhood intelligence, childhood behavior disturbance and education were examined as predictors of status attainment in midlife (46 to 51 years). Social class of origin, intelligence and behavior disturbance were conceptualized as correlated predictors, whose effects were hypothesized to be partially mediated by educational qualifications. A structural equation model using Full Information Maximum Likelihood estimation confirmed that education had the strongest direct effect on status attainment at midlife. Furthermore, education partially mediated the effects of social class of origin and childhood intelligence, and fully mediated the effects of behavior disturbance on status attainment. Social class of origin, childhood intelligence and behavior disturbance were strongly inter-correlated. After controlling for these associations, educational and social status attainments were influenced to a considerably greater extent by childhood intelligence than by social class of origin.  相似文献   
899.
900.
The epistemological turn towards social constructionism has become well established within the field of family systemic therapy. Social constructionism has provided therapists with a theoretical rationale for the concentration upon the social context within which individuals and families live their lives. This is a philosophical position that pushes to the margins the positivist premise that individuals have fixed and measurable personalities in favour of a discourse which proposes that the person is encountered differently within different social contexts. Prompted by the growing interest in systemic practice with individuals and by the rediscovery of the psychoanalytic canon within family therapy literature, the adequacy of this position is examined and an attempt is made to open up a space within social constructionist discourse for a theory of individual subjectivity. Findings from a research project are the starting point for this venture. These findings are understood through the lens of psychoanalytic theory, with particular reference to the work of Jacques Lacan.  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