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   2952篇
  免费   168篇
  2023年   38篇
  2022年   58篇
  2021年   80篇
  2020年   112篇
  2019年   93篇
  2018年   166篇
  2017年   170篇
  2016年   148篇
  2015年   83篇
  2014年   109篇
  2013年   388篇
  2012年   222篇
  2011年   229篇
  2010年   143篇
  2009年   72篇
  2008年   187篇
  2007年   142篇
  2006年   123篇
  2005年   67篇
  2004年   62篇
  2003年   68篇
  2002年   43篇
  2001年   32篇
  2000年   37篇
  1999年   21篇
  1998年   18篇
  1997年   13篇
  1996年   6篇
  1995年   7篇
  1994年   8篇
  1993年   12篇
  1992年   6篇
  1991年   18篇
  1990年   8篇
  1989年   10篇
  1988年   11篇
  1987年   9篇
  1986年   7篇
  1985年   11篇
  1984年   5篇
  1981年   6篇
  1980年   5篇
  1979年   5篇
  1972年   5篇
  1971年   6篇
  1969年   3篇
  1968年   8篇
  1967年   4篇
  1966年   7篇
  1965年   8篇
排序方式: 共有3120条查询结果,搜索用时 31 毫秒
901.
Terán  Larissa  Jiao  Jian  Aubrey  Jennifer Stevens 《Sex roles》2021,84(9-10):610-625
Sex Roles - The present study examines the associations between past experiences of interpersonal sexual objectification (ISO) on relationship initiation, social withdrawal, and positive...  相似文献   
902.
Journal of Religion and Health - Preadolescents’ involvement in religious congregations may serve as a distal protective factor against aggression. Interviews were conducted to...  相似文献   
903.
Punčochář  Vít 《Studia Logica》2021,109(5):995-1017

In this paper we introduce a class of inquisitive Heyting algebras as algebraic structures that are isomorphic to algebras of finite antichains of bounded implicative meet semilattices. It is argued that these structures are suitable for algebraic semantics of inquisitive superintuitionistic logics, i.e. logics of questions based on intuitionistic logic and its extensions. We explain how questions are represented in these structures (prime elements represent declarative propositions, non-prime elements represent questions, join is a question-forming operation) and provide several alternative characterizations of these algebras. For instance, it is shown that a Heyting algebra is inquisitive if and only if its prime filters and filters generated by sets of prime elements coincide and prime elements are closed under relative pseudocomplement. We prove that the weakest inquisitive superintuitionistic logic is sound with respect to a Heyting algebra iff the algebra is what we call a homomorphic p-image of some inquisitive Heyting algebra. It is also shown that a logic is inquisitive iff its Lindenbaum–Tarski algebra is an inquisitive Heyting algebra.

  相似文献   
904.
905.
Background/ObjectiveThe aim of the study was to examine the factor structure and psychometric properties of the Spanish version of the Mini-Mental Adjustment to Cancer Scale (Mini-MAC) in a large sample of patients with non-metastatic, resected cancer.MethodsProspective, observational, multicenter study for which 914 patients were recruited from 15 Spanish hospitals. Exploratory and confirmatory factor analyses, validity and reliability analyses were conducted.ResultsFactor-analytic results indicated a 4-factor structure of the Spanish version of the Mini-MAC. Three subscales have psychometric properties similar to those of Helplessness, Anxious preoccupation, and Cognitive avoidance of the original the Mini-MAC. The Fighting spirit and the Fatalism subscales were combined on the Positive attitude scale. The four factor-derived scale scores exhibited acceptable accuracy for individual measurement purposes, as well as stability over time in test-retest assessments at 6 months. Validity assessments found meaningful relations between the derived scale scores, and Brief Symptom Inventory depression and anxiety scores and Functional Assessment of Chronic Illness Therapy spiritual well-being scores.ConclusionsThe Spanish version of the Mini-MAC provides reliable and valid measures for patients with non-metastatic, resected cancer, and results corroborate the instrument’s cross-cultural validity.  相似文献   
906.
Background/ObjectiveAfter an acquired brain injury (ABI), the person remains with several impairments and disabilities that cause a decrease in his/her quality of life (QoL), which could change over time. The objective of the study was to analyse the evolution patterns of QoL in a sample of persons with ABI for one-year as well as the differences in proxy- and self-report versions of a QoL instrument. Method: The sample comprised 402 persons with ABI with ages ranging between 18 and 91 years, whom 36.20% had had the accident recently (i.e., three years or less). Patients, professionals and relatives responded at three evaluation points to the CAVIDACE scale, an ABI-specific QoL tool. Results: ANOVAs showed an improvement in QoL in the two follow-ups; the improvement was especially significant in the period between baseline and six months. The respondent factor did not interact with the evaluation time, but significant differences were found between respondents, with scores of patients higher than that for proxies. Finally, the QoL’s evolution interacts with the time elapsed since injury, showing significant improvements in the most recent group (i.e., three years or less). Conclusions: QoL must be considered from the earliest moments after ABI to obtain more significant improvements.  相似文献   
907.
Applied Research in Quality of Life - We aimed to determine whether social isolation is associated with higher health-care utilization among European older adults. We have used panel data...  相似文献   
908.
Attentional difficulties are a core axis in attention-deficit/hyperactivity disorder (ADHD). However, establishing a consistent and detailed pattern of these neurocognitive alterations has not been an easy endeavour. Based on a dimensional approach to ADHD, the present study aims at comprehensively characterizing three key attentional domains: the three attentional networks (alerting, orienting, and executive attention), two components of vigilance (executive and arousal vigilance), and distraction. To do so, we modified a single, fine-grained task (the ANTI-Vea) by adding irrelevant distractors. One hundred and twenty undergraduates completed three self-reports of ADHD symptoms in childhood and adulthood and performed the ANTI-Vea. Despite the low reliability of some ANTI-Vea indexes, the task worked successfully. While ADHD symptoms in childhood were related to alerting network and arousal vigilance, symptoms in adulthood were linked to executive vigilance. No association between ADHD symptom severity and executive attention and distraction was found. In general, our hypotheses about the relationships between ADHD symptoms and attentional processes were partially supported. We discuss our findings according to ADHD theories and attention measurement.  相似文献   
909.
Mexican mothers have an important role in adolescent sexuality; however, they report multiple barriers to parent–child sex communication, which may impact adolescent sexual behaviour. This cross-sectional study examines whether adolescent perceptions of maternal barriers to communication are associated with adolescent sexual behaviour frequency indirectly through its association with maternal monitoring, and whether these associations differ by age and gender. Mexican adolescents (N = 1433), ages 12–19 (53% girls), completed a survey on normative sexual behaviours, adolescent perceptions of maternal barriers to sex communication, and maternal monitoring. Structural equation modelling analyses revealed that more barriers to communication (adolescent perceptions) were associated with more sexual behaviour frequency (i.e., oral and vaginal sex) among Mexican adolescents indirectly through its association with maternal monitoring. Findings were stronger for adolescents in 8th grades, but no differences were found by gender. This model expands our understanding of the parenting factors that impact Mexican adolescent sexuality.  相似文献   
910.
This study aimed to describe and compare naming speed abilities in children diagnosed with either Reading Learning Difficulties (RLD) or Attention Deficit/Hyperactivity Disorder (ADHD), or comorbidity for both (ADHD+RLD). To examine the explanatory power of naming speed and ADHD symptomatology in predicting group associations (while controlling for gender and age), the “Rapid Automatized Naming and Rapid Alternating Stimulus Tests” (RAN/RAS) were utilized. A sample of 101 children (age range = 5–16 years) was divided into four groups: RLD (n = 14), ADHD (n = 28), comorbid (n = 19), and control (n = 40). There were statistically significant differences in RAN/RAS results among the diagnostic groups. Moreover, discriminant analysis revealed that naming speed tasks significantly predicted reading and attentional problems, especially at earlier ages. These results demonstrate the potential usefulness of RAN/RAS in the diagnosis of reading and attentional problems, particularly if the children are aged from 5 to 9.  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