全文获取类型
收费全文 | 22505篇 |
免费 | 63篇 |
国内免费 | 2篇 |
专业分类
22570篇 |
出版年
2022年 | 12篇 |
2021年 | 17篇 |
2020年 | 37篇 |
2019年 | 42篇 |
2018年 | 3501篇 |
2017年 | 2852篇 |
2016年 | 2282篇 |
2015年 | 229篇 |
2014年 | 133篇 |
2013年 | 262篇 |
2012年 | 635篇 |
2011年 | 2449篇 |
2010年 | 2550篇 |
2009年 | 1511篇 |
2008年 | 1774篇 |
2007年 | 2245篇 |
2006年 | 114篇 |
2005年 | 294篇 |
2004年 | 254篇 |
2003年 | 195篇 |
2002年 | 122篇 |
2001年 | 72篇 |
2000年 | 90篇 |
1999年 | 63篇 |
1998年 | 63篇 |
1997年 | 45篇 |
1996年 | 32篇 |
1995年 | 28篇 |
1994年 | 31篇 |
1993年 | 27篇 |
1992年 | 30篇 |
1991年 | 21篇 |
1990年 | 31篇 |
1989年 | 16篇 |
1988年 | 26篇 |
1987年 | 26篇 |
1986年 | 24篇 |
1985年 | 34篇 |
1984年 | 42篇 |
1983年 | 33篇 |
1982年 | 37篇 |
1981年 | 41篇 |
1980年 | 26篇 |
1979年 | 34篇 |
1978年 | 30篇 |
1977年 | 22篇 |
1976年 | 27篇 |
1975年 | 15篇 |
1974年 | 22篇 |
1973年 | 17篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
Hyperactive and comparison boys participated in 5-week summer enrichment programs that included classroom activities and structured assessments of peer interaction patterns. During the 3rd and 4th weeks of these programs, a double-blind, methylphenidate-placebo crossover design was implemented within the hyperactive group. Three heterogeneous indicators of everyday behaviors were obtained: number of negative incidents noted by staff, quality of handwriting, and number of times the teacher called the boys' names aloud in the classroom. Medication effects emerged for each of these indicators. When hyperactive boys were taking placebos, they were involved in more negative incidents, their handwriting was poorer, and their names were called more frequently than when the boys were taking methylphenidate. Interrelationships among the measures suggest moderate cross-situational generality of medication responsiveness. Discussion focused on the bandwidth of medication effects and the need to examine the social ramifications of child treatments.This research was supported in part by NIMH grant 29475 and NIDA grant 01070. We gratefully acknowledge the participation of the data coders and the many summer school staff. Special thanks go to Mike Berlin, Barry E. Collins, and Sharon Dotemoto. Methylphenidate and placebo were supplied by Ciba-Geigy, Summit, New Jersey. 相似文献
62.
Male-female differences in self-disclosure were found as a function of sex stereotyping of topic content. Men disclosed less than women on “feminine” topics, which emphasized personal concerns and sensitivities. Men and women did not differ in disclosure on “neutral” topics, considered appropriate for both sexes to discuss. Men and women did not differ in disclosure on “masculine” topics (emphasizing assertiveness) in two of three experiments. Theoretical mechanisms that might mediate sex differences in self-disclosure were considered. 相似文献
63.
A sample of 77 subjects responded to a questionnaire designed to collect information about their perceptions of the role of school psychologists. The results indicate that overall the respondents had a fairly accurate sense of what a school psychologist does, although they overestimated the importance of psychotherapy as one of the school psychologist's functions. It is recommended that school psychologists more clearly specify their function when dealing with members of the general public. 相似文献
64.
Howard S. Hock Barbara Throckmorton Elizabeth Webb Alan Rosenthal 《Memory & cognition》1981,9(5):461-471
The three experiments reported in this study were each conducted in two phases. The first phase of Experiment 1 involved a same-different comparison task requiring “same” responses for both mixed-case (e.g., MAIN main) and pure-case (e.g., near near) pairs. This was followed by Phase 2, a surprise recognition test in which a graphemic effect on word retention was indicated by the superior recognition accuracy obtained for pure-case compared with mixed-case pairs. The first phases of Experiments 2 and 3 involved pronounceability and imageability judgment tasks, respectively. Graphemic retention was assessed by contrasting recognition accuracy for letter strings presented, during Phase 2, in their original Phase 1 case, with letter strings presented, during Phase 2, in. a graphemically dissimilar new case. The experiments provided evidence that there was minimal retention of the graphemic representations from which the phonemic representations of words are generated and, further, that the locus of this effect is probably postlexical. Nonwords were recognized more accurately than words in all three experiments. The latter result was attributed to differences between nonwords and words in both graphemic retention and semantic distinctiveness. 相似文献
65.
Wolfgang Heinemann Fritz Pellander Antje Vogelbusch Barbara Wojtek 《European journal of social psychology》1981,11(1):1-25
Studied differences in verbal, nonverbal, and physiological responses during a confrontation with a male confederate role-playing either a physically handicapped (PH), homosexual (HS), or normal (NOR) person. One hundred and eight males from colleges of economics and engineering listened in a laboratory experiment to personal introductions by two confederates in succession. Whereas the first confederate always appeared normal, the second took one of the three roles mentioned. A further informal meeting with this confederate was arranged outside the laboratory; all subjects had taken a stereotype test before. Normative differences between PH and HS (p ≤ 0.05) are found on verbal measures including the stereotype test, self-rated emotion and consent to a further contact. General effects of deviance separating PH and HS from NOR (p ≤ 0.05) emerge on observed emotion, interpersonal distance during the informal meeting, and skin-resistance responses. The results largely confirm the hypotheses. They are interpreted as supporting a distinction between intended (action-type) components of behaviour which are strongly influenced by subjective norms, and unintended (reaction-type) components reflecting undifferentiated reactions to deviance. 相似文献
66.
Barbara N. Vosk Rex Forehand Rolando Figueroa 《Journal of psychopathology and behavioral assessment》1983,5(2):151-160
The purpose of this study was to assess the perceptions of emotions by accepted and rejected children. Peer ratings and peer sociometrics were used to identify accepted and rejected children. All children were administered a task specifically designed to measure their ability to perceive emotions. This task consisted of a series of videotaped interactions involving two individuals—either two adults or two children—portraying one of three affective states: happiness, sadness, and anger. After viewing each interaction, children were asked to identify what the person was feeling. In addition, teachers and peers rated the children on their ability to perceive emotions in others. The results indicated that accepted children obtained significantly higher scores than rejected children on the identification of emotions in the interactions. Teachers and peers also rated accepted children as better perceivers of emotions than rejected children. Implications of the results are discussed. 相似文献
67.
68.
Four different establishment programs (programmed traditional, delayed auditory feedback, pause, and gradual increase in length and complexity of utterance) for improving the fluency of school-age children who stutter were compared. The programs were carried out by eight public school clinicians with 16 children (eight elementary and eight junior-senior high school) in their respective schools. All four programs produced important improvement in the speech fluency of the 16 children. All the children demonstrated transfer of fluency to extratraining settings. The delayed auditory feedback program required the least therapy hours, but it was difficult for the clinicians to operate correctly. The gradual increase in length and complexity of utterance programs produced the best overall results. The transfer and maintenance programs provided for additional generalization and permanency of fluency. Follow-up revealed that the children continued their increased level of fluency. 相似文献
69.
This study investigated the degree and congruence of students' estimated and actual information about gender traditional and nontraditional occupations. Twenty-nine female and 29 male college students completed an instrument on which they rated how much they thought they knew about 18 male-dominant and 18 female-dominant occupations. They also completed an instrument measuring their actual knowledge of these and an additional wide variety of occupations. Results showed that subjects of each sex perceived themselves as less informed about nontraditional occupations. This result was much more pronounced for women than men. Each sex also tended to underestimate their actual knowledge of nontraditional occupations. Men and women did not differ in their actual knowledge, which was fairly limited for both sexes. 相似文献
70.
Irwin G. Sarason Barbara R. Sarason Gregory R. Pierce Edward N. Shearin Merlin H. Sayers 《Journal of applied social psychology》1991,21(11):896-918
A field experiment conducted in high schools throughout the country was aimed at increasing the number of high school students who donate blood. Special interventions that emphasized psychological or educational approaches to heightening motivation to donate, as well as a combined intervention, were compared with the usual approach taken at blood drives. Psychological interventions in which social learning principles (modeling, perceptions of social norms) played important roles either alone or in combination with an educational (informational) approach were more successful in stimulating blood donations than either an educational approach alone or the approaches traditionally followed by the participating local blood centers. The results demonstrated that use of social learning principles in designing interventions to strengthen socially relevant altruistic behavior could be valuable both practically and theoretically. 相似文献