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   21210篇
  免费   15篇
  21225篇
  2018年   3485篇
  2017年   2822篇
  2016年   2252篇
  2015年   191篇
  2014年   83篇
  2013年   150篇
  2012年   582篇
  2011年   2395篇
  2010年   2518篇
  2009年   1475篇
  2008年   1714篇
  2007年   2180篇
  2006年   41篇
  2005年   227篇
  2004年   174篇
  2003年   133篇
  2002年   85篇
  2001年   49篇
  2000年   66篇
  1999年   28篇
  1998年   29篇
  1997年   28篇
  1996年   11篇
  1995年   10篇
  1994年   11篇
  1993年   10篇
  1992年   12篇
  1990年   23篇
  1989年   11篇
  1987年   11篇
  1985年   12篇
  1984年   15篇
  1983年   10篇
  1982年   10篇
  1981年   15篇
  1980年   15篇
  1978年   17篇
  1975年   10篇
  1974年   9篇
  1973年   16篇
  1972年   13篇
  1971年   9篇
  1969年   11篇
  1966年   15篇
  1964年   12篇
  1963年   10篇
  1961年   10篇
  1958年   10篇
  1956年   11篇
  1953年   9篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
121.
Contract cheating, or plagiarism via paid ghostwriting, is a significant academic ethical issue, especially as reliable methods for its prevention and detection in students’ assignments remain elusive. Contract cheating in academic assessment has been the subject of much recent debate and concern. Although some scandals have attracted substantial media attention, little is known about the likely prevalence of contract cheating by students for their university assignments. Although rates of contract cheating tend to be low, criminological theories suggest that people who employ ghostwriters for their assignments are likely to re-offend, and little is known about re-offence rates in this form of academic misconduct. We combined previously-collected datasets (N = 1378) and conducted additional, and previously-unreported, analyses on self-report measures of contract cheating prevalence. We found that few students (3.5%), on aggregate, ever engaged in contract cheating but this varied substantially among samples (from 0.3% to 7.9%). Of those who ever engaged in contract cheating, 62.5% did so more than once. The data also suggested that engagement in contract cheating is influenced by opportunity. These figures may help policy makers, and researchers who are creating contract cheating detection methods, to estimate base rates of contract cheating and the likelihood of re-offence.  相似文献   
122.
Our longitudinal study contributes to the body of literature on depression in childhood by examining potential protective factors. We investigated the influence of maternal depressive symptoms on child depressive symptoms at early school age and its gender-specific moderation by children’s narrative representations of the maternal figure, over and above children’s own depressive symptoms at preschool age. Children’s narrative representations were assessed using the MacArthur Story Stem Battery in 170 preschool children (92 girls; 54.1?%) oversampled for internalizing symptoms. Children’s depressive symptoms were assessed at preschool age (Time 1; 4–6 years) and at early school age (Time 2; 6–8 years) by maternal report; mothers’ depressive symptoms were assessed at Time 1. The results showed that for boys, only their own depressive symptoms at Time 1 predicted their depressive symptoms at Time 2. For girls, maternal depressive symptoms were a significant risk factor for their own depressive symptoms at Time 2. Regarding this association, we also found a moderation effect: girls with more positive narrative representations of the maternal figure showed a reduced negative impact of maternal depressive symptoms on their own depressive symptoms at Time 2. This implies that clinical practice should screen a child for early depressive symptoms, especially if the mother displays depressive symptoms. Clinicians might also assess children’s inner working models, which can serve as a protective factor.  相似文献   
123.
Research has tried to identify risk factors that increase the likelihood of difficulties with externalizing behavior. The relations between individual or environmental factors and externalizing behavior have been especially documented. Child-oriented and parent-oriented interventions have been designed in order to decrease externalizing behavior in preschoolers. To date, however, research has largely been compartmentalized. It is therefore not known whether child-oriented or parent-oriented intervention is more effective in reducing externalizing behavior. The aim of the current study was to answer this question by comparing two 8-week child with two 8-week parent-oriented group programs sharing a common experimental design. This was done in a pseudo-randomized trial conducted with 73 3–6-year-old children displaying clinically relevant levels of externalizing behavior who were assigned to one of the four interventions and 20 control participants who were allocated to a waiting list. The results indicate that the four programs focusing on a specific target variable, i.e., social cognition, inhibition, parental self-efficacy beliefs, or parental verbal responsiveness, are all effective in reducing externalizing behavior among preschoolers. Their effectiveness was moderated neither by their orientation toward the child or the parent nor by their content, suggesting that several effective solutions exist to improve behavioral adaptation in preschoolers. A second important highlight of this study is that, thanks to comparable effect sizes, brief focused programs appear to be a reasonable alternative to long multimodal programs, and may be more cost-effective for children and their families.  相似文献   
124.
This mixed method study examined factors associated with parents not attending their child’s mental health treatment after initially seeking help for their 2–5 year old child. It was part of a larger study comparing two evidence-based treatments among low-income racial/ethnic minority families seeking child mental health services. Of 123 parents who initiated mental health treatment (71?% African American or multi-racial; 97.6?% low-income), 36 (29.3?%) never attended their child’s first treatment session. Socio-demographic characteristics, parenting stress, depression, severity of child behavior problems, and length of treatment delay from intake to first scheduled treatment session were compared for families who did and did not attend their first treatment session. Parents who never attended their child’s first treatment session were more likely to live with more than four adults and children (p?=?.007) and have more depressive symptoms (p?=?.003). Median length of treatment delay was 80 days (IQR?=?55) for those who attended and 85 days (IQR?=?67.5) for those who did not attend their child’s first treatment session (p?=?.142). Three themes emerged from caregiver interviews: (a) expectations about the treatment, (b) delays in getting help, and (c) ambivalence about research participation. Findings suggest the need to develop better strategies for addressing risk factors early in the treatment process and reducing the length of time families with adverse psychosocial circumstances must wait for child mental health treatment.  相似文献   
125.
We conducted a one-year follow-up study of child psychoeducational assessment cases to examine whether and how the assessments were helpful to families. The current report focuses on parents’ views of their child’s assessment as well as the parents’ adherence with the written recommendations provided to them following their child’s assessment. Fifty-one of 72 eligible parents whose child received an assessment in an urban, Midwest university clinic participated. Based on semistructured interviews with the parents about the assessment recommendations, we grouped the recommendations and any barriers to adherence the parents mentioned into categories, and we also rated the clarity and complexity of the recommendations. Findings showed that, on average, parents identified the assessment process as useful and attempted or fully adhered to 71.5?% of recommendations. Parents reported the lowest adherence when referrals were recommended for their child to be seen by other professionals such as a pediatrician or psychiatrist; and they cited significantly more stigma barriers for recommendations to seek counseling/therapy or psychotropic medication than for recommendations pertaining to changes at home or school. Higher parental compliance was predicted by a combination of parents reporting fewer barriers and receiving more home based recommendations. The results support the utility of psychological assessments from parents’ perspectives and suggest ways in which psychologists may increase the likelihood that parents will adhere to their recommendations.  相似文献   
126.
The present study examined authoritative parenting and associations with parenting sense of competence and social support in Chinese mothers of children with intellectual disability and mothers of typically developing children. One hundred and sixty-seven mothers of children with intellectual disability with a mean age of 10.89 years (SD?=?1.74) and 119 mothers of typically developing children with a mean age of 10.55 years (SD?=?1.10) participated in a survey. Mothers of children with intellectual disability reported similar levels of parental warmth, and less use of reasoning and autonomy support compared with mothers of typically developing children. Parenting efficacy contributed uniquely to three dimensions of authoritative parenting for mothers of children with intellectual disability. By comparison, parenting efficacy did not contribute to use of reasoning and autonomy support for mothers of typically developing children. Social support made a unique but small contribution to parental warmth but not to parental reasoning and autonomy support for mothers of children with intellectual disability. For mothers of typically developing children, social support was associated with both parental warmth and autonomy support. This study suggests that child disability status is related to maternal authoritative parenting, and additionally, parenting efficacy plays a more critical role in predicting authoritative parenting of Chinese mothers of children with intellectual disability than mothers of typically developing children.  相似文献   
127.
Predictors of the physical and relational aggressive behavior of children in foster care were examined (N?=?160, 50.9% male, M age?=?7.57, SD?=?2.39). First, predictors representative of children’s placement histories were examined in relation to the children’s aggression at T1. Next, predictors representing characteristics of the current family environment were examined in relation to the children’s aggression at T2 (4 months later). Results revealed that a greater number of prior group home placements and being in a non-kinship home were associated with higher physical aggression at T1. A greater number of prior group home placements, a fewer number of regular home placements, being in a non-kinship home, and prior removal from the home due to neglect were associated with higher relational aggression at T1. The results also revealed that higher foster sibling relational aggression at T1 predicted lower child physical aggression at T2. If foster siblings were biological children of the foster parent, higher levels of a foster sibling’s physical aggression at T1 predicted reduced child physical aggression at T2. The opposite pattern was observed if foster siblings were not biological children of the foster parent. Lastly, longer time in the current placement, more children in the home, and the presence of a sibling that was a biological child of the parent predicted higher child relational aggression at T2. These findings provide initial insights into how placement history and current family environment are associated with the physical and relational aggressive behavior of children in foster care.  相似文献   
128.
Identifying children with symptoms of anxiety before they develop clinical disorders is important. The objective of our study was to examine the latent factor structure of the MASC (youth report version) in a large self-selected sample of school children in 4th to 6th grade, and examine if the measure had a comparable factor structure for gender and age. Gender and age differences in anxiety symptoms were also examined. Children (N?=?1686, 53.8% female) were recruited from schools during pretest of an ongoing randomized, controlled, indicative intervention. Latent variable modelling was used to determine the underlying concepts of the MASC. We found good model fit for the four-factor model, however some items on the Harm/Avoidance scale had low factor loadings. Invariance analysis indicated that the MASC had similar factor structure (comparable meaning) for boys and girls and for younger and older children in this sample. Girls scored significantly higher than boys on all subscales and on the Total Anxiety scale. Age differences were only found on the Separation Anxiety scale. Overall, the original four-factor structure of the MASC was confirmed within a large sample of school children and was invariant across gender and age. However, the Harm/avoidance scale warrants some attention. The MASC is a potentially useful measure to be used for screening purposes in a school setting.  相似文献   
129.
Measurable aspects of child health and wellbeing for children in same-sex parented families show that these children develop well, overall. Increasingly however, it is understood that stigma can have a negative impact on their health within a same sex family context. The aim of this study is to understand how child health in same-sex parented families is constructed by same-sex attracted parents and what this teaches us about the impact of stigma on child health in this context. Families from across Australia were sampled from a larger study of child health and wellbeing. We used family interviews, which took place between January and August 2013. Thematic analysis was used to identify themes. We report on the data from 11 parents with 10 children. Families presented stories of heteronormative conflict that arose from their position in society. Through family constructs, gender assumptions, discrimination and challenging interactions with institutions this heteronormative conflict had a significant influence on child health, sometimes through the generation of broader familial stress. Resilience building was used by parents to construct a positive environment for child health by combating the lack of understanding and discrimination seen at a societal level. Resilience that is developed to combat stigma provides significant benefits, particularly in a heteronormative world where traditional assumptions about families dominate. The anticipation of stigma, and heteronormative pressures, can stimulate same-sex attracted parents to prepare their children for potential negativity. This should be supported through appropriate school programs and considered political leadership.  相似文献   
130.
Parent–adolescent conflict poses risk for youth maladjustment. One potential mechanism of this risk is that stress in the form of increased arousal during conflict interactions results in adolescents’ impaired decision-making. However, eliciting consistent adolescent stress responses within laboratory-based tasks of parent–adolescent conflict (i.e., conflict discussion tasks) is hindered by task design. This limitation may stem from how conflict topics are assessed and selected for discussion. Within a sample of 47 adolescents (ages 14–17) and parents, we investigated whether a modified version of a conflict discussion task could elicit physiological (i.e., arousal) and behavioral (i.e., hostility) displays of adolescents’ conflict-related stress responses. We assessed parent–adolescent conflict via structured interview to identify topics for dyads to discuss during the task. We randomly assigned dyads to complete a 5-min task to discuss either a putatively benign topic (i.e., control condition) or a conflict topic while undergoing direct assessments of continuous arousal. Trained raters coded dyad members’ hostile behavior during the task. Adolescents in the conflict condition exhibited significantly greater levels of arousal than adolescents in the control condition. We observed an interaction between discussion condition and baseline conflict. Specifically, higher baseline conflict predicted greater hostile behavior for adolescents in the conflict condition, yet we observed the inverse relation for adolescents in the control condition. Our modified laboratory discussion task successfully elicited both physiological and behavioral displays of adolescent conflict-related stress. These findings have important implications for leveraging experimental paradigms to understand causal links between parent–adolescent conflict and adolescent psychopathology, and their underlying mechanisms.  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