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   53215篇
  免费   2151篇
  国内免费   30篇
  2020年   606篇
  2019年   773篇
  2018年   1100篇
  2017年   1119篇
  2016年   1141篇
  2015年   769篇
  2014年   954篇
  2013年   4652篇
  2012年   1711篇
  2011年   1860篇
  2010年   1078篇
  2009年   1101篇
  2008年   1679篇
  2007年   1650篇
  2006年   1458篇
  2005年   1353篇
  2004年   1299篇
  2003年   1180篇
  2002年   1211篇
  2001年   1758篇
  2000年   1661篇
  1999年   1282篇
  1998年   676篇
  1997年   580篇
  1996年   523篇
  1995年   525篇
  1994年   501篇
  1993年   525篇
  1992年   1018篇
  1991年   962篇
  1990年   949篇
  1989年   859篇
  1988年   819篇
  1987年   807篇
  1986年   810篇
  1985年   863篇
  1984年   677篇
  1983年   585篇
  1982年   477篇
  1979年   663篇
  1978年   487篇
  1976年   452篇
  1975年   596篇
  1974年   623篇
  1973年   601篇
  1972年   545篇
  1971年   476篇
  1968年   540篇
  1967年   543篇
  1966年   477篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
941.
942.
943.
Behavioral conceptions of alcohol abuse often include the hypothesis that drinking behavior is a negatively reinforced operant, with ethanol intoxication viewed as alleviating aversive environmental and internal states. This hypothesis has not been confirmed or refuted by previous studies which employed mild stressors and limited assessment methodology. In the present experiment, 22 patients with severe phobias approached their phobic animal under two consecutive conditions—first while sober and second after drinking either a placebo or an intoxicating dose of ethanol. The severe anxiety induced was assessed behaviorally, physiologically and by the patient's self-report of fear. The intoxicated patients did not experience decreased anxiety, tachycardia or avoidance, compared to the placebo group. These results have clinical implications and suggest the need to reconsider tension-reduction theories of alcohol abuse.  相似文献   
944.
945.
Four insulin-requiring diabetic Ss were followed in single-S designs to measure the impact of progressive muscle relaxation training on blood glucose and stress levels. Measures of blood glucose, stress, activity and caloric intake were taken four times a day, along with a daily measure of anxiety. Two of the 4 Ss showed a significant decrease in blood glucose during treatment periods as compared to baseline measures. Similarly, 2 of the 4 Ss showed a significant decrease in stress levels during treatment. A multiple regression analysis revealed some significant relationships between blood glucose, stress, activity level and caloric intake. The results support previous studies that show relaxation techniques to be a viable aid in establishing greater diabetic control.  相似文献   
946.
947.
Three self-report anxiety questionnaires were administered to a sample of Lebanese undergraduates shortly before the Israeli invasion of Lebanon in 1982. Six months after the disengagement of forces, the investigator located 20 Ss who had remained in West Beirut throughout the siege and 35 Ss who had evacuated to safer environs. The inventories were readministered to the Ss and the results revealed that: (1) there were no significant differences between the preinvasion scores of the evacuees and nonevacuees: (2) there were no significant differences between the postinvasion scores of the evacuees and nonevacuees: and (3) the aggregate scores of both groups vis-á-vis war-related stimuli were significantly lower at postassessment.  相似文献   
948.
Memory &; Cognition - In a modified Stroop paradigm, Kahneman and Henik (1981) varied the spatial location of incompatible color words in relation to the position of the ink color to be named. A...  相似文献   
949.
Aphasic, right-hemisphere-damaged, and non-brain-damaged subjects heard short narrative paragraphs. Each paragraph contained four main ideas and one or more details related to each main idea. After each paragraph was presented, subjects' comprehension and retention of main ideas and details from the paragraph were tested. Some of the test items directly restated information from paragraphs and others paraphrased information from paragraphs. All groups of subjects remembered main ideas better than they remembered details, and no group of subjects was significantly affected by whether test items directly or indirectly stated information from paragraphs. Disfluent aphasic and right-hemisphere-damaged subjects' overall paragraphs comprehension scores were not significantly poorer than those of non-brain-damaged subjects. Fluent and mixed aphasic subjects' overall paragraph comprehension scores were significantly worse than those of non-brain-damaged and right-hemisphere-damaged subjects. Token Test and Boston Diagnostic Aphasia Examination auditory comprehension scores did not predict aphasic subjects' paragraph comprehension scores. right-hemisphere-damaged subjects' overall paragraph comprehension scores were not significantly those of non-brain-damaged and right-hemisphere-damaged subjects. Token Test and Boston Diagnostic Aphasia Examination auditory comprehension scores did not predict aphasic subjects' paragraph comprehension scores.  相似文献   
950.
Aphasic and nonaphasic listeners' comprehension of main ideas and details within coherent and noncoherent narrative discourse was examined. Coherent paragraphs contained one topic to which all sentences in the paragraph related. Noncoherent paragraphs contained a change in topic with every third or fourth sentence. Each paragraph contained four main ideas and one or more details that related to each main idea. Listeners' responses to yes/no questions following each paragraph yielded the following results: (1) Nonaphasic listeners comprehended the paragraphs better than aphasic listeners. (2) Both aphasic and nonaphasic listeners comprehended main ideas better than they comprehended details. (3) Coherence did not affect comprehension of main ideas for either group. (4) Coherence did not affect comprehension of details by nonaphasic subjects. (5) Coherence affected comprehension of details by aphasic subjects, and their comprehension of details in coherent paragraphs was worse than their comprehension of details in noncoherent paragraphs. There was no significant correlation between Token Test scores and measures of paragraph comprehension.  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