全文获取类型
收费全文 | 16875篇 |
免费 | 809篇 |
国内免费 | 15篇 |
出版年
2021年 | 132篇 |
2020年 | 225篇 |
2019年 | 241篇 |
2018年 | 357篇 |
2017年 | 359篇 |
2016年 | 366篇 |
2015年 | 281篇 |
2014年 | 309篇 |
2013年 | 1318篇 |
2012年 | 569篇 |
2011年 | 644篇 |
2010年 | 371篇 |
2009年 | 349篇 |
2008年 | 472篇 |
2007年 | 451篇 |
2006年 | 394篇 |
2005年 | 334篇 |
2004年 | 338篇 |
2003年 | 318篇 |
2002年 | 323篇 |
2001年 | 700篇 |
2000年 | 699篇 |
1999年 | 461篇 |
1998年 | 180篇 |
1997年 | 173篇 |
1996年 | 139篇 |
1995年 | 135篇 |
1993年 | 138篇 |
1992年 | 360篇 |
1991年 | 321篇 |
1990年 | 345篇 |
1989年 | 334篇 |
1988年 | 317篇 |
1987年 | 288篇 |
1986年 | 310篇 |
1985年 | 298篇 |
1984年 | 235篇 |
1983年 | 200篇 |
1979年 | 190篇 |
1978年 | 161篇 |
1975年 | 187篇 |
1974年 | 241篇 |
1973年 | 197篇 |
1972年 | 203篇 |
1971年 | 167篇 |
1970年 | 149篇 |
1969年 | 198篇 |
1968年 | 202篇 |
1967年 | 161篇 |
1966年 | 182篇 |
排序方式: 共有10000条查询结果,搜索用时 46 毫秒
291.
To determine whether actual responses of potential comforters in the community differ according to cause of death, 83 college students participated in a structured, individual interview. They were asked demographic questions about themselves, the bereaved, and the deceased, and then about various aspects of how they, and others in the community, responded to the death. Students were grouped by their reports of the cause of death (suicide, homicide, accident, natural anticipated death, or natural unanticipated death). When the death was by suicide or homicide, others were perceived as relatively less supportive of the bereaved person. When the death was by suicide, respondents themselves tended more to blame the bereaved person. When the death was by homicide, the bereaved person was perceived as reacting relatively worse. Potential comforters were relatively more shocked when the death was by homicide or accident. 相似文献
292.
The self-consciousness scale of Fenigstein, Scheier, and Buss (1975) was subjected to internal and external consistency tests based on the classical test theory model. The scale was found to have five underlying dimensions: two for private self-consciousness (viz., self-reflectiveness and internal state awareness), two for public self-consciousness, and one for social anxiety. The confirmatory factor analysis procedures employed by Burnkrant and Page (1984) are shown to be fallible as indicators of unidimensionality. Theoretical implications of newly identified dimensions in the public self-consciousness subscale are discussed. 相似文献
293.
Ono K 《Journal of the experimental analysis of behavior》1987,47(3):261-271
Twenty undergraduate students were exposed to single response-independent schedules of reinforcer presentation, fixed-time or variable-time, each with values of 30 and 60 s. The reinforcer was a point on a counter accompanied by a red lamp and a brief buzzer. Three color signals were presented, without consistent relation to reinforcer or to the subjects' behavior. Three large levers were available, but the subjects were not asked to perform any particular behavior. Three of the 20 subjects developed persistent superstitious behavior. One engaged in a pattern of lever-pulling responses that consisted of long pulls after a few short pulls; the second touched many things in the experimental booth; the third showed biased responding called sensory superstition. However, most subjects did not show consistent superstitious behavior. Reinforcers can operate effectively on human behavior even in the absence of a response-reinforcer contingency and can, in some cases, shape stable superstitious patterns. However, superstitious behavior is not a consistent outcome of exposure of human subjects to response-independent reinforcer deliveries. 相似文献
294.
McIntire KD Cleary J Thompson T 《Journal of the experimental analysis of behavior》1987,47(3):279-285
Two cynomolgous macaques categorized six colors into two groups of three after conditional discrimination training (zero-delay symbolic match-to-sample). The procedures resulted in the establishment of relations among the elements of each set-relations that were not specifically trained and that can be characterized by the properties of reflexivity, symmetry, and transitivity. Each set of colors was related to a characteristic pattern of responding: One response pattern involved temporal duration (press and hold the response keys); the second response pattern entailed repeated pressing and releasing of the response keys (fixed ratio 8). Six combinations of two colors were trained, three combinations from each set. After discriminative performance stabilized for each monkey, they were tested with 10 additional color combinations, all of which differed from the training combinations. The conditional relations established between test combinations can be characterized as stimulus equivalence. The training procedures were analogous to the procedure of using category names, and have implications for understanding the function of language in the formation of equivalence classes. 相似文献
295.
296.
297.
298.
Tacit knowledge in managerial success 总被引:2,自引:0,他引:2
299.
300.
The past fifteen years, in particular, have seen a major increase in the extent to which both adolescents and young adults are engaging in sexual intercourse. While several studies call attention to the increasing incidence among college/university students, the concomitant shifts in the sociopsychological realms of sexuality are also important dimensions which impact upon sexual concerns of youth. Hence, the purposes of this study are to examine the behaviors, attitudes, and concerns of students who have engaged in coitus, as well as any changes they seek in their sex lives. The sample consisted of 123 never-married male and 205 never-married female undergraduate students from a state university. The data were obtained by utilizing an anonymous questionnaire administered to volunteers during regular university classes. Among the coitally active, 67.4% of males were psychologically satisfied after their first sexual experience, but only 28.3% of females. In contrast, 80.9% of males and 28.3% of females reported current psychological satisfaction with their sexual experiences. Significant differences between genders focused on male dissatisfaction with infrequent opportunities for sexual intercourse, lack of variety of sex partners, and insufficient oral-genital stimulation, whereas females expressed concerns relating to lack of stimulation to their breasts, painful sexual intercourse, lack of orgasm during sexual intercourse, and feelings of guilt and fear. An increasing awareness of current sexual behaviors, attitudes, and concerns of university students can help family life educators to meet student needs as they react to changes in interpersonal relationships, families, and society. 相似文献