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   22842篇
  免费   72篇
  国内免费   2篇
  2018年   3504篇
  2017年   2845篇
  2016年   2282篇
  2015年   215篇
  2014年   105篇
  2013年   373篇
  2012年   624篇
  2011年   2449篇
  2010年   2543篇
  2009年   1509篇
  2008年   1753篇
  2007年   2219篇
  2006年   94篇
  2005年   290篇
  2004年   228篇
  2003年   180篇
  2002年   123篇
  2001年   63篇
  2000年   79篇
  1999年   56篇
  1998年   73篇
  1997年   52篇
  1996年   49篇
  1995年   36篇
  1994年   36篇
  1993年   36篇
  1992年   31篇
  1991年   38篇
  1990年   41篇
  1989年   44篇
  1988年   35篇
  1987年   32篇
  1986年   30篇
  1985年   26篇
  1984年   43篇
  1983年   35篇
  1982年   47篇
  1981年   37篇
  1980年   41篇
  1979年   42篇
  1978年   45篇
  1977年   37篇
  1976年   40篇
  1975年   34篇
  1974年   43篇
  1973年   36篇
  1971年   26篇
  1969年   34篇
  1968年   26篇
  1967年   25篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
941.
The deadliest U.S. school shooting to date, occurring on February 14, 2018 at Marjory Stoneman Douglas High School in Parkland, Florida serves as a powerful reminder that school violence is ever present. Addressing school violence, however, has been an elusive endeavor. The purpose of this review is to provide a historical examination of United States intentional mass school shootings in the 20th and 21st centuries. In addition, implications for students, schools, and society are discussed in light of policy and legislative initiatives as well as school-based prevention and intervention tiered models of support, such as positive behavior interventions and supports (PBIS).  相似文献   
942.
Many researchers have reported elevated rates of emotional, behavioral, and social competence problems (EBSP) in children with epilepsy. Although executive function has been found to be associated with EBSP in children with typical development, almost no research has looked at the individual components of executive function as potential predictors of EBSP in children with epilepsy. This is surprising given the deficits in executive function in children with epilepsy. We investigated EBSP and executive function in 42 children with epilepsy, aged 6.0 to 18.1 years and found, as expected, that EBSP were associated with executive function in these children even after epilepsy-related variables, such as seizure type, were accounted for. However, different components of executive function were related to different emotional, behavioral, and social competence problems in these children. Shifting of mental sets was a significant predictor of emotional, behavioral, and social competence problems whereas inhibition was a significant predictor of behavioral problems. This suggests that different executive function profiles in children with epilepsy may place them at-risk for developing different types of emotional, behavioral, and social competence problems. These results may help researchers and clinicians develop new techniques to identify and treat emotional, behavioral, and social competence problems in children with epilepsy.  相似文献   
943.
The current study compared parents’ emotion regulation (ER) in clinical (those with a child with externalizing behavioral problems) and low-risk comparison families. Additionally, mediation models were explored with parent ER predicting child behavior problems through child ER. Participants were 60 families with children (71.7% boys; 73% Caucasian) ages 2 through 8 years (M?=?4.62; SD?=?1.69) from a rural population in the United States: 34 clinical families referred for parent training and 26 nonclinical families. A blocking design was used to balance the two groups on key demographic characteristics. Parents’ and children’s ER was assessed using parent-report surveys and structured behavioral observations. Analyses indicated higher rates of parental emotion dysregulation (specifically, more difficulty when upset with achieving goal-directed behaviors, p?=?.01, d?=?0.67; controlling impulses, p?=?.01, d?=?0.64; limited use of ER strategies, p?=?.02, d?=?0.62; and more negative verbalizations to their child during the observed task, p?<?.01, d?=?0.73) and child emotion dysregulation (specifically, more difficulty as reported by parents, p?<?.01, d?=??2.42) in the clinical group. Mediational analyses indicated there were indirect paths from parental ER to children’s behavioral problems through child ER. Findings from this research suggest a need to measure and target ER in both parents and their children when working with families who are referred for treatment of child behavior problems.  相似文献   
944.
A limited number of measures assess young adults’ perceptions of childhood disorganized and controlling attachment, and although they are empirically strong, the use of these measures can be time consuming and financially straining. The current study aimed to add to the attachment literature by developing a self-report measure, the Childhood Disorganization and Role Reversal Scale (CDRR), to assess for the complexity of those attachment constructs in young adults. This study aimed to assess the psychometric properties of the CDRR using two separate samples of 750 and 656 undergraduate students (601 females; Mage?=?18.68, 66.4% Caucasian; 531 females; Mage?=?18.68 years, 63.6% Caucasian; respectively), and a community sample of 96 participants (81 females, Mage?=?19.27, 65.6% Caucasian). The results of the Principal Component Analysis (PCA) revealed a four-factor structure for both CDRR parent versions. The CDRR mother version includes the Disorganization/Punitive, Mutual Hostility, Affective Caregiving, and Appropriate Boundaries scales, while the CDRR father version includes the Disorganization, Affective Caregiving, Appropriate Boundaries, and Punitive scales. Overall, support was provided for the psychometric properties of the CDRR. For instance, the CDRR scales demonstrated adequate structural stability (confirmatory factor analyses), internal consistency (Cronbach’s coefficient alphas ranged from .78–.95 for mother scale, and .75–.96 or father scale), temporal reliability (intraclass correlation coefficient ranged from .68–.89 for mother scale, and .69–.87 for father scale), criterion-related validity, convergent validity, and discriminant validity. The CDRR will assist researchers in broadening the understanding of psychological outcomes of disorganized and controlling attachment representations in young adulthood.  相似文献   
945.
Family structure plays an important role in childhood obesity but the association between having siblings and childhood obesity is not well established. The purpose of this systematic review was to examine the relationship between sibling factors and child health behaviors and child obesity. CINAHL, Cochrane Reviews, PsycINFO and PubMed were searched to identify relevant publications between 2000 and 2016. Of 141 identified studies, 22 peer-reviewed, primary research reports satisfied inclusion criteria and were included in the review. Findings indicated that children without siblings are more likely to be overweight or obese. Having fewer siblings was associated with decreased physical activity, inadequate sleep, and unhealthy dietary habits. The relationship between the number of siblings and childhood obesity persisted over time. All but two studies reported an association between birth order and childhood obesity. Youngest siblings were at a higher risk of becoming overweight or obese than their older siblings. Overall, the findings emphasize the importance of sibling factors in the development of childhood obesity. Further studies are needed to understand the dynamics underlying the effect of siblings on child’s health-related behaviors in order to develop effective childhood obesity prevention programs. Healthcare professionals should focus on family structure and at-risk children when intervening to prevent childhood obesity.  相似文献   
946.
The current study aimed to develop and evaluate a measure of parenting knowledge, the Knowledge of Parenting Strategies Scale (KOPSS); specifically, to establish the scales internal reliability, ensure a clinically appropriate length, provide a community sample for future comparison, demonstrate adequate test–retest reliability and convergent validity, and to compare the scale to dysfunctional discipline styles. A total of n?=?865 parents were involved in the development and evaluation of the scale. In Study 1, data was collected from n?=?229 parents and Rasch analyses revealed seven items did not fit the measurement model. Study 2 involved a further sample of community families (n?=?346) and revealed the scale could be further shortened to 16 items. Study 3 revealed the scale has good test–retest reliability over a one-week period (r?=?.88, p?<?.001). Study 4 demonstrated convergent validity through a comparison to the Knowledge of Effective Parenting Scale (r?=?.583, p?=?.009). Study 5 utilised a sample of community families (n?=?190), revealing the scale was negatively correlated with hostile and lax discipline (r?=??.29, p?<?.001; r?=??.15, p?<?.05). Lastly, Study 6 showed scores on the KOPSS significantly improved following clinic-based and Internet-based Behavioural Parent Training. The KOPSS was found to be a valid and reliable measure of parenting knowledge of effective parenting strategies, which can be used to evaluate knowledge acquisition in parenting programs, and test the role of knowledge in behaviour change.  相似文献   
947.
Research evidence indicates that a childhood history of maltreatment affects parental behaviors in adulthood. The aim of the study was to investigate the predictors for parental behaviors among individuals who reported a history of maltreatment. The current study investigated whether attachment styles, emotional regulation and cognitive appraisals of parenting predicted parental behaviors (positive vs. negative). The study also investigated the differential effects of abuse experiences in childhood (physical, sexual, emotional, and neglect) on parental behaviors. The participants were 213 high-risk Jewish and Arab parents of children aged six and under. Participants completed five self-report questionnaires assessing parental behaviors, childhood experiences of abuse and neglect, attachment styles, emotional regulation, and cognitive appraisal of parenthood. The regression analyses revealed that personal attributes such as ethnicity, childhood experience of emotional abuse/neglect, emotional regulation, and appraisal of parenting, predict negative parental behavior. Anxious attachment and childhood emotional abuse and neglect moderated the impact of parenthood appraisal on parenting behaviors. Although physical and sexual abuse had the highest impact on insecure attachment, emotional abuse/neglect had higher predictive power for non-positive parenting. Clinical interventions for improving the capacity for emotional regulation and parent-child relational skills are suggested.  相似文献   
948.
There may be significant differences in coping styles across ethnicities. Previous research has suggested disparities in the number of individuals who utilize repressive adaptive coping style among cultural groups. Repressive adaptive style is a coping mechanism in which individuals report low distress levels while they actually experience high levels of stress. Developing an enhanced understanding of the prevalence of the utilization of repressive adaptive style in different ethnic groups is important for informing intervention techniques to better account for the cultural influences on mental health. The present study investigated the utilization of repressive adaptive style across American Indian (n?=?31), African American (n?=?53), and European American (n?=?48) children in the Midwest. The age range of the children was 10 to 13 years and 50.8% were male. Dependent measures included the Children’s Social Desirability Scale and the State-Trait Anxiety Inventory for Children. Results indicated significant differences in reports of anxiety between ethnic groups. Additionally, it was discovered that African American and European American children utilized repressive adaptive style more than American Indian children, albeit not significantly. Because of the high rates of suicide and emotional distress believed to be experienced by American Indian children this result is interesting. Continued research investigating protective factors, such as high levels of cultural identity and connectedness, is warranted.  相似文献   
949.
The individual’s level of perceived self-efficacy could be an important driver for early retirement preparation. Most employees in Ugandan organisations reach that age of retirement without sufficient knowledge on how they will survive during their post-retirement life. This study sought to examine whether self-efficacy predicts psychological preparation and financial preparation for retirement. The sample of 924 employees aged 24–60 years selected voluntarily from four three service-oriented organisations participated in this study. Confirmatory factor analysis was run to confirm whether the factor indices (latent variables) extracted from exploratory factor analysis were actually measures of psychological preparation and financial preparation for retirement. Structural equation modelling was used to test regression relationships, and correlation between latent variable of the dependent constructs was tested using Pearson product moment correlation coefficients. The findings indicated a four-factor model for psychological preparation and a two-factor model for financial preparation. Self-efficacy predicted only three factors of psychological preparation and finance management mediated the relationship between self-efficacy and personal initiative. With these findings, it was concluded that individuals with capacity to adapt new changes can easily re-engage in other jobs. Similarly, those concerned with their social identity will focus on developing career skills that would yield the same level of importance in society. However, finance management training is crucial to the development of strategies and competences that empower people to maintain satisfying lifestyles after retirement. Finally, self-efficacy is a driving factor of personal initiative but the relationship is reinforced when finance management competences are acquired.  相似文献   
950.
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