全文获取类型
收费全文 | 31612篇 |
免费 | 1193篇 |
国内免费 | 18篇 |
出版年
2019年 | 409篇 |
2018年 | 559篇 |
2017年 | 608篇 |
2016年 | 571篇 |
2015年 | 426篇 |
2014年 | 478篇 |
2013年 | 2427篇 |
2012年 | 850篇 |
2011年 | 961篇 |
2010年 | 630篇 |
2009年 | 623篇 |
2008年 | 872篇 |
2007年 | 812篇 |
2006年 | 758篇 |
2005年 | 641篇 |
2004年 | 591篇 |
2003年 | 635篇 |
2002年 | 581篇 |
2001年 | 1194篇 |
2000年 | 1168篇 |
1999年 | 841篇 |
1998年 | 367篇 |
1997年 | 298篇 |
1995年 | 296篇 |
1994年 | 302篇 |
1992年 | 718篇 |
1991年 | 693篇 |
1990年 | 657篇 |
1989年 | 609篇 |
1988年 | 582篇 |
1987年 | 578篇 |
1986年 | 544篇 |
1985年 | 606篇 |
1984年 | 472篇 |
1983年 | 368篇 |
1981年 | 295篇 |
1979年 | 462篇 |
1978年 | 342篇 |
1977年 | 327篇 |
1976年 | 304篇 |
1975年 | 412篇 |
1974年 | 416篇 |
1973年 | 475篇 |
1972年 | 383篇 |
1971年 | 319篇 |
1970年 | 306篇 |
1969年 | 327篇 |
1968年 | 377篇 |
1967年 | 333篇 |
1966年 | 385篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
271.
The present study aimed to determine whether there was a systematic relationship between Rogers'(1957) core conditions of empathy, acceptance and genuineness, and counsellors' use of specific behaviours or skills which have been isolated for training. Video recordings of 12 counsellors' performance in 'naturalistic' counselling interactions were analysed. Counsellor, client and judges' ratings of the core conditions were obtained. Skill assessment included molar ratings of eight skill areas and molecular measures of 29 behaviours. The results indicated that there were few significant relationships. It is concluded that there is a discrepancy between specification of the skills or behaviours which are thought to communicate the core conditions and those which have been empirically demonstrated to do so. Implications for counsellor training and proposals for future research are discussed. 相似文献
272.
THE STUDY OF GOALS IN PSYCHOLOGY 总被引:3,自引:0,他引:3
Carol S. Dweck 《Psychological science》1992,3(3):165-167
273.
274.
Randolph W. Parks Daniel S. Levine Debra L. Long David J. Crockett Irene E. Dalton Herbert Weingartner Paul Fedio Kerry L. Coburn Gil Siler Jane R. Matthews Robert E. Becker 《Neuropsychology review》1992,3(2):213-233
Neural networks can be used as a tool in the explanation of neuropsychological data. Using the Hebbian Learning Rule and other such principles as competition and modifiable interlevel feedback, researchers have successfully modeled a widely used neuropsychological test, the Wisconsin Card Sorting Test. One of these models is reviewed here and extended to a qualitative analysis of how verbal fluency might be modeled, which demonstrates the importance of accounting for the attentional components of both tests. Difficulties remain in programming sequential cognitive processes within a parallel distributed processing (PDP) framework and integrating exceedingly complex neuropsychological tests such as Proverbs. PDP neural network methodology offers neuropsychologists co-validation procedures within narrowly defined areas of reliability and validity. 相似文献
275.
Perkins HS 《The Journal of clinical ethics》1992,3(2):133-137
[The author identifies] five problems familiar to clinical ethicists. (1) Physicians often do not recognize important ethical issues. (2) Debate exists over whether such consultations should give specific management recommendations. (3) Principles of medical ethics cannot, by themselves, resolve real ethical issues. (4) The patient's interests sometimes conflict with the interests of the family, the health professionals, and the hospital. (5) Clinical ethics consultations take a toll on the consultant....[He] discuss[es] the implications of each problem for clinical ethics consultations and offer[s] a solution to it. 相似文献
276.
M H Huang S S Hull R D Foreman R Lazzara S Wolf 《Integrative Physiological and Behavioral Science》1992,27(1):6-12
The shortening of the QT interval of the electrocardiogram coincident with acceleration of heart rate and vice versa has been accepted for many years as evidence that the action potential duration and hence QT are necessarily dependent on heart rate. Exceptions to this rule have been attributed to the intervention of counteracting autonomic effects. In order to test this assumption, 26 conscious dogs divided into three groups were tested during baroreceptor stimulation by a bolus injection of phenylephrine. Seventeen dogs had been used in earlier studies in which they had undergone an experimental anterior myocardial infarction with apparent full recovery. A group of those dogs underwent beta-adrenergic blockade by intravenous atenolol 30 min prior to the baroreceptor activation. To test the intactness of the baroreceptor responses in the previously infarcted dogs, a third group of nine dogs that had had no prior myocardial infarction was included. All dogs were adapted to the laboratory environment and were not sedated during experiments. Simultaneous recordings of RR, QT interval, and phasic arterial pressure were made in all dogs before and during baroreceptor stimulation. In the normal group, and the previously infarcted group that received no atenolol, baroreceptor stimulation elicited a small (8/msec), but significant prolongation of the QT associated with a nearly 50% reduction in heart rate. The QT interval of the atenolol-treated dogs, although significantly more prolonged before stimulation, remained unchanged during the reflex. The data indicate that withdrawal of ventricular sympathetic tone may prolong the QT interval, thereby confirming the role of sympathetic innervation in the control of QT.(ABSTRACT TRUNCATED AT 250 WORDS) 相似文献
277.
278.
279.
J S Howard 《Integrative Physiological and Behavioral Science》1992,27(3):209-215
Past literature suggests a link between certain psychotic states and adrenal androgen production, including Dehydroepiandrosterone (DHEA). A group of severely psychotic androgenized females, refractory to substantial amounts of neuroleptics, has been identified for whom endocrine testing revealed abnormally high levels of DHEA. A similar group has been identified among the severely psychotic male population. Improvement in psychosis appears to occur as DHEA returns to its normal range using standard low dose Dexamethasone suppression. 相似文献
280.
S Wolf 《Integrative Physiological and Behavioral Science》1992,27(3):246-257
Predictors of myocardial infarction with or without survival were sought in a 30-year study of Roseto, Pennsylvania, a nearly exclusively Italian community of approximately 1,600, compared to the immediately adjacent town of Bangor with a population of approximately 5,000. At the start of the study the death rate from myocardial infarction among men in Roseto was less than half that in Bangor despite an equal prevalence of the usual risk factors, mainly smoking and diet. The communities were followed prospectively for 30 years during a striking social change in Roseto toward less family and community cohesion and more commitment to individual goals and adherence to materialistic values. During this period the prevalence of and mortality from myocardial infarction increased sharply to equal the situation in Bangor. The predictive values of measurements made of Rosetans during individual examinations in 1962-63 were tested against the outcome in 1990. Those who experienced fatal myocardial infarction and those who had a well documented infarction and survived were matched with and compared to controls. Although subjects with cholesterol concentration above 200 were twice as likely to experience myocardial infarction as those with concentrations below 200, less than 20% of those whose cholesterol concentration was above 200 experienced any evidence of myocardial infarction over the nearly 30-year period. Moreover, there were no significant differences between the coronary patients, with or without survival, and their sex, age, and cholesterol matched controls; nor were smoking, evidence of hypertension, diabetes, or obesity predictive of significant differences between the two groups. These data lead to the inference that while those with the conventional risk factors are more likely to develop myocardial infarction than are those without the risk factors, an even larger proportion of the population may have the risk factors and not succumb to myocardial infarction over a period of nearly three decades. 相似文献