全文获取类型
收费全文 | 12687篇 |
免费 | 528篇 |
国内免费 | 2篇 |
出版年
2021年 | 74篇 |
2020年 | 135篇 |
2019年 | 167篇 |
2018年 | 236篇 |
2017年 | 260篇 |
2016年 | 262篇 |
2015年 | 200篇 |
2014年 | 262篇 |
2013年 | 1435篇 |
2012年 | 453篇 |
2011年 | 493篇 |
2010年 | 306篇 |
2009年 | 320篇 |
2008年 | 484篇 |
2007年 | 440篇 |
2006年 | 430篇 |
2005年 | 434篇 |
2004年 | 436篇 |
2003年 | 419篇 |
2002年 | 448篇 |
2001年 | 219篇 |
2000年 | 183篇 |
1999年 | 198篇 |
1998年 | 212篇 |
1997年 | 204篇 |
1996年 | 163篇 |
1995年 | 173篇 |
1994年 | 159篇 |
1993年 | 179篇 |
1992年 | 167篇 |
1991年 | 140篇 |
1990年 | 143篇 |
1989年 | 126篇 |
1988年 | 119篇 |
1987年 | 131篇 |
1986年 | 117篇 |
1985年 | 149篇 |
1984年 | 187篇 |
1983年 | 190篇 |
1982年 | 192篇 |
1981年 | 173篇 |
1980年 | 140篇 |
1979年 | 132篇 |
1978年 | 177篇 |
1977年 | 156篇 |
1976年 | 160篇 |
1975年 | 141篇 |
1974年 | 156篇 |
1973年 | 105篇 |
1972年 | 76篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
201.
John Douard 《Theoretical medicine and bioethics》1990,11(3):213-226
In the discussion of the responsibilities of society to the HIV infected and uninfected, a serious question seems to have been left out of the picture: To what extent are people who are not infected, have no special relationship to the infected and have no professional responsibilities for the care of AIDS patients under an obligation to come to the aid of people with the HIV? In this paper, I shall examine our responsibilities, as members of society, for the welfare of others to whom we may or may not have a special relationship. I shall argue that those responsibilities flow from the conditions that structure our transactions with others; conditions that make such transactions possible. 相似文献
202.
203.
John B. Pittenger 《Attention, perception & psychophysics》1990,48(2):124-130
Growth systematically changes the body proportions of both humans and animals so that the ratio of head height to body height decreases with age. Prior studies have demonstrated that body proportions provide effective information for age perception. To test the proposal that illustrators incorporate this information into their drawings, measurements were made of the head and body heights of 100 pairs of animals appearing in children’s picture books. In 93 pairs, the animal intended to be perceived as older had a smaller head-to-body ratio than did the younger animal. Ratings collected for 25 of these pairs showed that both perceived age and cuteness are significantly correlated with body proportions. The magnitudes of the correlations were only modest, suggesting that other aspects of the drawings influenced perceived age and cuteness. In addition, observers reported that body proportions are only one of a variety of factors influencing age and cuteness perception. As has been found in other studies, perceived age and cuteness were negatively correlated. 相似文献
204.
Young Children's Understanding of Thinking and Consciousness 总被引:2,自引:0,他引:2
John H. Flavell 《Current directions in psychological science》1993,2(2):40-40
205.
206.
Donna Y. Ford J. John Harris James M. Schuerger 《Journal of counseling and development : JCD》1993,71(4):409-417
A review of the literature suggests that a paucity of information exists regarding how culture-specific issues such as being both Black and gifted influence the psychological needs and personality development of gifted Black students. Stellar attempts, however, are currently underway to develop theories and perspectives of racial identity development among Black students. These theories and perspectives are discussed in an attempt to understand and address the psychological and social needs of gifted Black students. 相似文献
207.
Thomas W. Hosie John D. West James A. Mackey 《Journal of counseling and development : JCD》1993,71(3):355-359
The authors studied employment and roles of master's-level counselors in employee assistance programs (EAPs) and the services offered by different types of EAP organizations. The study focused on programs, workshops and seminars: assessment; counseling; consultation; and evaluation and marketing services offered by EAPs. Master's-level counselors were found to be similar to those with Master's of Social Work (MSW) degrees in employment rate and percentage of EAP staff. Both groups were the most frequently employed and constitute the greatest percentage of the professional mental health staff in EAPs. Also, counselors were found to be involved in all of the service areas studied within each type of EAP. Differences in counselors' roles among EAP types are discussed. 相似文献
208.
Joan Polansky John J. Horan Christine Hanish 《Journal of counseling and development : JCD》1993,71(5):488-492
The authors evaluated the separate and combined effects of study skills training and career counseling on student retention. Participants who were at high risk for dropping out of college were randomly assigned to one of four treatment or control conditions. The study-skills-alone treatment had a significant impact on retention; all of these participants continued their enrollment in the following two semesters. Career-counseling-alone and a combined (study skills plus career counseling) treatment did not register significant effects. Participants who received the study-skills-alone treatment also achieved significantly greater academic success; 88% had grade point averages (GPAs) equal to or greater than 2.0, whereas most other treatment and control participants had GPAs lower than 2.0 and were placed on academic probation. Issues relevant to the construct validity of these changes are discussed. 相似文献
209.
John E. Kurtz Leslie C. Morey Andrew J. Tomarken 《Journal of psychopathology and behavioral assessment》1993,15(3):255-266
The recent accumulation of self-report measures of borderline personality disorder (BPD) affords the opportunity to evaluate both the construct validity of the concept and the quality of these measures. This study examines the relationship among three recently developed self-report instruments for assessing BPD from the Personality Assessment Inventory (PAI; Morey, 1991), the MMPI Personality Disorders Scales (MPD; Morey, Waugh, & Blashfield, 1985), and the Bell Object Relations Inventory (BORI: Bell, Billington, & Becker, 1986). Data on the three measures were provided by 119 undergraduate subjects from a southeastern university. A correlational analysis addresses the convergence of these measures of BPD, their divergence from measures of different but related traits, and their independence from variance due to method. Application of the Campbell-Fiske (1959) criteria indicates adequate convergence for all the BPD measures but a lack of discriminant validity for the BORI scales. The fit of the data to a structural model of construct validity is tested using confirmatory factor analysis, and these results are consistent with the hypothesis of a latent borderline trait factor independent of measurement method factors. In sum, the construct validity of the borderline personality concept using self-report methodologies receives support, and a strong association between borderline personality and paranoid phenomena is also suggested. 相似文献
210.
Subjects (average age 21 years, recruited by personal contact and through a school) were presented with a spoken sentence on tape and then heard six speakers of the same sex, including the original speaker, say the same sentence. They were required to indicate which was the original speaker. The task was repeated with seven different sentences and sets of speakers. One group of subjects heard short sentences containing an average of 2.14 different vowel sounds and 6.28 syllables, another group heard short sentences containing an average of 6.14 vowel sounds (7.28 syllables) and a third group heard longer sentences containing an average of 6.28 vowel sounds (11.00 syllables). Accuracy of speaker identification improved significantly when more vowel sounds were heard, but increased sentence length had no significant effect on performance. Performance was significantly better when the listener was the same sex as the speaker than when the listener was of the other sex. 相似文献