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   42294篇
  免费   1017篇
  国内免费   9篇
  2021年   210篇
  2020年   360篇
  2019年   398篇
  2018年   3930篇
  2017年   3228篇
  2016年   2745篇
  2015年   595篇
  2014年   588篇
  2013年   2139篇
  2012年   1408篇
  2011年   3207篇
  2010年   3048篇
  2009年   2020篇
  2008年   2498篇
  2007年   2909篇
  2006年   768篇
  2005年   843篇
  2004年   819篇
  2003年   697篇
  2002年   658篇
  2001年   618篇
  2000年   625篇
  1999年   464篇
  1998年   308篇
  1997年   250篇
  1996年   206篇
  1995年   234篇
  1994年   224篇
  1993年   219篇
  1992年   330篇
  1991年   323篇
  1990年   316篇
  1989年   302篇
  1988年   313篇
  1987年   290篇
  1986年   257篇
  1985年   271篇
  1984年   271篇
  1983年   204篇
  1982年   223篇
  1981年   203篇
  1980年   188篇
  1979年   247篇
  1978年   202篇
  1976年   184篇
  1975年   201篇
  1974年   232篇
  1973年   235篇
  1972年   188篇
  1968年   193篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
911.
This study examines the relationship between Minnesota Multiphasic Personality Inventory-2 (MMPI-2) measured personality characteristics and marital distress and provides empirical validation for using the MMPI-2 with a marital therapy population. Studied were 150 couples in marital therapy and 841 normal couples who participated in the MMPI-2 restandardization study. The MMPI-2, a biographical form, a partner rating form, and the Dyadic Adjustment Scale (DAS) were administered to all couples. The marital counseling group resembled previous marital counseling samples studied with the MMPI and scored significantly higher than the normative sample on several MMPI-2 scales. Relationships between the DAS and MMPI-2 clinical and content scale scores are reported. The Psychopathic Deviate (Pd) clinical scale and Family Problems (FAM) content scale were the most powerful group discriminators and strongest correlates of the DAS; their use as indices of marital distress is tested. The meaning of Pd as an index in assessing personality factors in marital distress is explored.  相似文献   
912.
This paper reviews the Health Belief Model (HBM) and the Religious Problem-Solving Coping Scale (RPSC) in an attempt to clarify religion's possible roles in health care actions. The HBM has been used for many years to suggest various influences on health care, including religion. The RPSC Scale investigates religion by looking at characteristics that link religion to the everyday practice of problem solving. Measuring religious beliefs with problemsolving coping allows the influence of religion to be considered in all areas of the HBM. This paper also illustrates the impact of using the RPSC scale and the HBM with implications for ministers and suggestions for further study.The author thanks Diana D. Bransfield, Ph.D., for her helpful guidance in preparing this article.  相似文献   
913.
Lever pressing by 4 squirrel monkeys was maintained under a three-component multiple fixed-ratio schedule of food presentation; components differed with respect to ratio size. For each monkey, acute administration of cocaine (0.03 to 1.3 mg/kg, i.m.) produced dose-dependent decreases in overall response rate in each component. During repeated daily administration of 1.0 mg/kg of cocaine, tolerance developed to the rate-decreasing effects under each of the ratio contingencies, but developed to a greater extent and was evident in earlier parts of sessions for performance under the smaller ratios. Response rates of 2 monkeys increased above nondrug control levels despite the putative reinforcer not being consumed during the session. When saline or a smaller dose of cocaine was substituted for 1.0 mg/kg, response rates often were suppressed below nondrug control-level responding. This suppressive effect was observed in each monkey and was more likely to be observed and/or to be of greater magnitude in large-ratio components for 3 of the 4 monkeys. When saline was administered chronically at the end of the chronic-drug phase, response rates remained suppressed in the large-ratio component for 2 of the monkeys. There was, therefore, a schedule-dependent dissociation between behavioral tolerance and the residual effects: Tolerance was greater when small ratios were arranged, whereas the residual effects were more pronounced when larger ratios were arranged.  相似文献   
914.
A 3-mo. follow-up was made of 64 male veterans who were discharged from a 21-day Alcohol Detoxification Treatment Program at the Veterans Affairs Medical Center at Lyons, NJ. Scores on the Rotter I-E and Alcohol Responsibility Scales were significantly correlated with tendencies toward a more external direction among the 13% who relapsed, significant on the I-E scale and nonsignificant on the Alcohol Responsibility Scale. When tests were compared as possible predictor variables of alcoholic relapse, the difference in favor of the I-E scale was statistically nonsignificant.  相似文献   
915.
916.
The Kaufman Test of Educational Achievement--Brief Form and the Wide Range Achievement Test--Revised Level 2 were administered in counterbalanced order to 50 male incarcerated juvenile delinquents. The analyses showed the similar subtests on the two tests, i.e., Kaufman Reading test and WRAT-R Reading, were highly correlated. The mean standard scores of th e similar subtests were not significantly different from each other. These results contrast with the significantly lower WRAT-R scores found when scores on the WRAT-R Level 1 are compared with those on the Kaufman test.  相似文献   
917.
Recency effects in direct and indirect memory tasks   总被引:1,自引:0,他引:1  
In three experiments, subjects learned two lists under incidental conditions and were then given either a part-word or a word (extralist associate) cue. Each cue was related to one word in each list. Half the subjects were given production instructions (an indirect memory test), and half were given cued recall instructions (a direct memory test). When the interval between List 2 and the test was shortened, recency effects were found for part-word cues for both cued recall and production instructions. Little or no recency effects were found with word cues. These results are incompatible with a simple distinction between the types of memory trace or information that are tapped by direct as opposed to indirect memory tasks. Possible causes for the recency effect and for the difference between word and part-word cues are discussed.  相似文献   
918.
There appear to be beneficial effects of stimulant medication on daily classroom measures of cognitive functioning for Attention Deficit Disorder (ADD) children, but the specificity and origin of such effects is unclear. Consistent with previous results, 0.3 mg/kg methylphenidate improved ADD children's performance on a classroom reading comprehension measure. Using the Posner letting-matching task and four additional measures of phonological processing, we attempted to isolate the effects of methylphenidate to parameter estimates of (a) selective attention, (b) the basic cognitive process of retrieving name codes from permanent memory, and (c) a constant term that represented nonspecific aspects of information processing. Responses to the letter-matching stimuli were faster and more accurate with medication compared to placebo. The improvement in performance was isolated to the parameter estimate that reflected nonspecific aspects of information processing. A lack of medication effect on the other measures of phonological processing supported the Posner task findings in indicating that methylphenidate appears to exert beneficial effects on academic processing through general rather than specific aspects of information processing.  相似文献   
919.
The developmental course of rhythmic motor behavior was followed longitudinally for three groups of preambulatory children — normally developing, Down syndrome, and those with profound motor impairment. The groups differed in chronological age but were comparable with respect to motor age. The motor impaired subjects displayed significantly less rhythmic motor behavior than the nondisabled and Down syndrome groups. In comparing particular subtypes of rhythmic motor behavior, differences were found in both the average number of bouts and duration of subtypes among the groups. Longitudinal analyses of the data over the entire observation period revealed that the rhythmic motor behavior of the children with Down syndrome was more similar to that exhibited by the nondisabled children than was the rhythmic motor behavior of the children with motor impairment. However, there was considerable variability among the groups in several particular subtypes.This research was supported by grants from the National Institute of Child Health and Human Development (HD 17650 and HD 07226).The authors acknowledge the assistance of Robert E. Arendt, Grant Youngquist, Michael Hohn, and Charles Lowitzer in obtaining the observational data and thank the families of the subjects for their enthusiasm and dedication to the project.This study was presented at the 23rd Annual Gatlinburg Conference on Research and Theory in Mental Retardation and Developmental Disabilities, April 21, 1990.  相似文献   
920.
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