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   1742篇
  免费   229篇
  国内免费   2篇
  1973篇
  2023年   37篇
  2020年   92篇
  2019年   14篇
  2018年   17篇
  2017年   81篇
  2016年   97篇
  2015年   75篇
  2014年   75篇
  2013年   355篇
  2012年   60篇
  2011年   35篇
  2010年   52篇
  2009年   65篇
  2008年   36篇
  2007年   29篇
  2006年   47篇
  2005年   22篇
  2004年   25篇
  2003年   15篇
  2002年   29篇
  2001年   8篇
  2000年   17篇
  1999年   19篇
  1998年   26篇
  1997年   11篇
  1996年   50篇
  1995年   36篇
  1994年   27篇
  1993年   30篇
  1992年   43篇
  1991年   44篇
  1990年   38篇
  1989年   28篇
  1988年   27篇
  1987年   22篇
  1986年   21篇
  1985年   15篇
  1984年   13篇
  1983年   13篇
  1982年   14篇
  1981年   19篇
  1980年   19篇
  1979年   24篇
  1978年   32篇
  1977年   27篇
  1976年   14篇
  1975年   6篇
  1974年   6篇
  1973年   6篇
  1966年   7篇
排序方式: 共有1973条查询结果,搜索用时 0 毫秒
991.
992.
993.
994.
995.
Individuals who report nonsuicidal self‐injury (NSSI) are characterized by the tendency to act rashly while experiencing distress (negative urgency), the tendency to act without thinking, and endorsement of both social and affect regulation motives for the behavior. However, very little research has identified characteristics that distinguish current self‐injurers from those with a history of the behavior. The purpose of this study was to compare individuals with current self‐injury to a history of self‐injury on impulsivity‐related personality traits, motives for self‐injury, and distress. Among a sample of 429 undergraduates, 120 reported self‐injury. Among these 120 individuals, 33 endorsed self‐injury within the past month, with a mean frequency of 4.77 acts of NSSI. Within the self‐injury group, current self‐injurers reported higher endorsement of affect regulation motives for NSSI, and higher levels of current negative affect than individuals with a history of self‐injury. There were no differences between current and former self‐injurers on measures of impulsivity, endorsement of social motives for NSSI, or positive affect. We propose that individuals who use NSSI to regulate negative affect may be more likely to repeatedly engage in this behavior over time.  相似文献   
996.
Are there gender‐specific risk factors for suicidal activity among patients with schizophrenia and depression? A total of 74 schizophrenia patients (51 men, 23 women) and 77 unipolar nonpsychotic depressed patients (26 men, 51 women) from the Chicago Follow‐up Study were studied prospectively at 2 years posthospitalization and again at 7.5 years. Poor early posthospital global functioning is significantly associated with later suicidal activity only for men in both our schizophrenia and depressive samples. Early display of psychotic symptoms is associated with later suicidal activity among male schizophrenia patients. Early cognitive impairment is not significantly associated with later suicidal activity for any of the four groups of patients. The study results must be seen as exploratory and will hopefully spur future research on this important topic.  相似文献   
997.
The number of citations a scholarly work receives is a common measure of its impact on the scientific literature; “citation classics” are the most highly cited works. The content of Suicide and Life‐Threatening Behavior (SLTB) citation classics is described here. The impact of SLTB citation classics is compared to their counterparts in journals having published the most suicide papers. All data are from the ISI electronic venue on the Web of Science and refer to the number of citations the top 1% of works received in each of ten journals from 1975 through August 10, 2011. Among all ten journals, SLTB ranked first in the number of works on suicide. The principle theme of half of SLTB suicide classics was literature review. The median number of citations for SLTB citation classics (top 1%) was 121.5, with a range between 96 and 279 citations, but classics from generalized psychiatric journals received more citations as anticipated. Journal impact factors explained 73% of the variance in classic’s citation counts across journals. On average, suicide classics received 30% more citations than all classics. Among a second group of five specialized suicide journals, however, SLTB ranked first in average 5‐year impact. Although SLTB produced the highest number of suicide articles of any journal, SLTB’s citation classics received fewer citations than suicide classics in high‐impact/prestige, general journals. Future work is needed to assess what predicts which SLTB articles ultimately become citation classics.  相似文献   
998.
Associations between suicidal behavior and social‐ecological variables were examined among 1,618 Latina high school students (mean age = 15) from the nationally representative Add Health sample (68% were U.S.‐born). Ideations were associated with having a suicidal friend, lower perceived father support, and overall parental caring. Attempts were associated with having a suicidal friend, and lower perceived teacher and parental support. Peer and mother relationship variables were not predictors of ideations or attempts. The protective role of father and teacher support has not previously been emphasized in the literature. Strengthening connections to parents and teachers may reduce suicidal behavior in adolescent Latinas.  相似文献   
999.
The Harkavy–Asnis Suicide Scale (HASS), one of the few self‐report scales assessing suicidal behavior was evaluated and ideation, was evaluated and predictors of suicide attempts (SAs) were identified with the goal of developing a model that clinicians can use for monitoring SA risk. Participants were 131 pediatric emergency department (ED) patients with suicidal behavior. The HASS and Diagnostic Interview Schedule for Children (DISC‐IV) were administered approximately 2 months after ED presentation. When compared with DISC‐IV ratings, sensitivity of the HASS SA items was excellent (100%), and overall classification accuracy was 72%. SA planning was the strongest predictor of SAs.  相似文献   
1000.
Little is known about accurate prevalence and associated factors of deliberate self‐harm (DSH) among adolescents in Asian countries. In this study, the prevalence and associated factors of DSH among adolescents in Japan were examined. Data were derived from a cross‐sectional survey using an anonymous self‐report questionnaire and enrolling 8,620 adolescents aged 12–15 and 9,484 aged 15–18. DSH in the previous 12 months was reported by 3.3% (95% CI, 2.9–3.7) of junior and 4.3% (3.9%–4.7%) of senior high school respondents. The prevalence was more than four times as high among girls as among boys for both age groups. DSH was further strongly associated with having suicidal thoughts, having depression/anxiety symptoms, and having used recreational drugs. These associated factors were similar for both sexes and for both older and younger teenagers. A substantial minority of adolescents present with DSH, even among those aged 12–15. The prevalence of DSH in Japan was in the lower ranges of those reported for Western countries. The identified associated factors were not dissimilar from those reported in the West.  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