全文获取类型
收费全文 | 23213篇 |
免费 | 941篇 |
国内免费 | 12篇 |
专业分类
24166篇 |
出版年
2019年 | 266篇 |
2018年 | 386篇 |
2017年 | 415篇 |
2016年 | 450篇 |
2015年 | 351篇 |
2014年 | 394篇 |
2013年 | 1985篇 |
2012年 | 653篇 |
2011年 | 664篇 |
2010年 | 408篇 |
2009年 | 407篇 |
2008年 | 520篇 |
2007年 | 566篇 |
2006年 | 487篇 |
2005年 | 450篇 |
2004年 | 441篇 |
2003年 | 428篇 |
2002年 | 460篇 |
2001年 | 757篇 |
2000年 | 726篇 |
1999年 | 562篇 |
1998年 | 238篇 |
1997年 | 217篇 |
1996年 | 246篇 |
1992年 | 468篇 |
1991年 | 461篇 |
1990年 | 445篇 |
1989年 | 421篇 |
1988年 | 441篇 |
1987年 | 393篇 |
1986年 | 406篇 |
1985年 | 406篇 |
1984年 | 331篇 |
1983年 | 296篇 |
1982年 | 231篇 |
1981年 | 230篇 |
1979年 | 374篇 |
1978年 | 265篇 |
1977年 | 226篇 |
1976年 | 215篇 |
1975年 | 291篇 |
1974年 | 376篇 |
1973年 | 380篇 |
1972年 | 302篇 |
1971年 | 297篇 |
1970年 | 293篇 |
1969年 | 266篇 |
1968年 | 361篇 |
1967年 | 321篇 |
1966年 | 305篇 |
排序方式: 共有10000条查询结果,搜索用时 8 毫秒
941.
Judged distance in a large open field, scaled by the method of magnitude estimation, is related to physical distance by a power function with an exponent smaller than unity. The exponents obtained with two ranges of distance were not affected by the availability of a standard. The mean exponent for all 80 individual power functions was 0.86, with a standard deviation of 0.11. 相似文献
942.
Quantitative amino acid determination in the serum and cerebrospinal fluid in endogenous depressions
B Dreves P Wiechert K Ernst 《Psychiatrie, Neurologie, und medizinische Psychologie》1983,35(7):409-415
The levels of 20 amino acids were measured in the plasma and cerbrospinal fluid of 41 patients with endogenic depressions. The plasma levels of 12 amino acids were found to be significantly lower in the patients than in the control group, but cerebrospinal fluid levels were significantly lower only in the case of taurine, glutamine, phenylalanine and aginine. Comparison of the same amino acid levels in treated and non-treated patients showed that serine and alpha-aminobutyric acid serum concentrations were higher in the nontreated patients. The tyrosine and phenylalanine levels in the cerebrospinal fluid of the patients who had received medicamentous treatment were higher than in the other group. 相似文献
943.
Two kinds of causal inference rules which are widely used by social scientists are investigated. Two conceptions of causation also widely used are explicated — the INUS and probabilistic conceptions of causation. It is shown that the causal inference rules which link correlation, a kind of partial correlation, and a conception of causation areinvalid. It is concluded anew methodology is required for causal inference. 相似文献
944.
Three experiments are reported that investigate the weighting attached to logic and belief in syllogistic reasoning. Substantial belief biases were observed despite controls for possible conversions of the premises. Equally substantial effects of logic were observed despite controls for two possible response biases. A consistent interaction between belief and logic was also recorded; belief bias was more marked on invalid than on valid syllogisms. In all experiments, verbal protocols were recorded and analyzed. These protocols are interpreted in some cases as providing rationalizations for prejudiced decisions and, in other cases, as reflecting a genuine process of premise to conclusion reasoning. In the latter cases, belief bias was minimal but still present. Similarly, even subjects who focus primarily on the conclusion are influenced to an extent by the logic. Thus a conflict between logic and belief is observed throughout, but at several levels of extent. 相似文献
945.
The capacity to selectively attend to only one of multiple, spatially separated, simultaneous sound sources—the “cocktail party” effect—was evaluated in normal subjects and in those with anterior temporal lobectomy using common environmental sounds. A significant deficit in this capacity was observed for those stimuli located on the side of space contralateral to the lobectomy, a finding consistent with the hypothesis that within each anterior temporal lobe is a mechanism that is normally capable of enhancing the perceptual salience of one acoustic stimulus on the opposite side of space, when other sound sources are present on that side. Damage to this mechanism also appears to be associated with a deficit of spatial localization for sounds contralateral to the lesion. 相似文献
946.
A left-handed patient with a right thalamic hemorrhage and disordered speech is described. Sequential examinations and aphasia testing were done during a 1-year follow-up period and the results are reported. This case supports those authors who have described characteristics they feel are helpful in diagnosing disordered speech associated with thalamic lesions. Paucity of speech, reduced voice volume, anomia, some paraphasia, and severe dysgraphia were present, but comprehension and repetition were relatively preserved. She showed modest improvement with time. This case also confirms that thalamic involvement in speech is a dominant, rather than a specifically left hemispheric function. 相似文献
947.
A nationwide survey of a stratified sample of 461 Army ROTC college cadets and 470 of their non-ROTC schoolmates was conducted in order to investigate sex and racial differences in military-related perceptions and attitudes. This article focuses on survey findings dealing with sex differences in respondents' military socialization, knowledge of ROTC and the Army, attitudes toward ROTC and the Army, and behavioral intentions with respect to a military career. Female cadets had (1) fewer military socializing influences, (2) less accurate knowledge about ROTC and the Army, (3) more favorable attitudes toward ROTC and the Army, and (4) less favorable intentions regarding military service than male cadets. Findings 2, 3, and 4 were also obtained in the noncadet schoolmate group; however, in this group, there were no significant sex differences in military socializing influences. A model based on these findings is developed as a starting point for attempts to account for the higher attrition rates of women in the military. 相似文献
948.
The differential outcome of 100 psychiatric inpatients distinguished by the presence/absence of secondary alcoholism was examined in shortterm closed group psychotherapy. Alcoholics did not differ from the general sample in outcome, but displayed distinct active/aggressive personality features. Group outcome was not affected by the presence/absence of alcoholic members. 相似文献
949.
Johanna Beyts Gertrude Frcka Irene Martin A.B. Levey 《Personality and individual differences》1983,4(3):275-283
An experiment is described in which the effects of Psychoticism and Extraversion on classical eyelid conditioning were examined using a balanced design involving two levels of paraorbital shock intensity and two levels of response threshold. Questionnaire measures of Anxiety and Impulsivity were also analysed together with subjective ratings of the UCS. Results were broadly consistent with Eysenck's personality theory in that subjects scoring high on Psychoticism demonstrated lower levels of conditioning. 相似文献
950.
SAREE J. PRATOMTHONG STANLEY B. BAKER 《Journal of counseling and development : JCD》1983,61(8):466-469
Suggestions are presented for overcoming traditional customs and governmental problems that are currently obstacles to the growth and development of guidance and counseling in Thailand. 相似文献