全文获取类型
收费全文 | 1894篇 |
免费 | 89篇 |
专业分类
1983篇 |
出版年
2023年 | 8篇 |
2021年 | 16篇 |
2020年 | 33篇 |
2019年 | 38篇 |
2018年 | 34篇 |
2017年 | 45篇 |
2016年 | 71篇 |
2015年 | 41篇 |
2014年 | 40篇 |
2013年 | 249篇 |
2012年 | 80篇 |
2011年 | 84篇 |
2010年 | 53篇 |
2009年 | 57篇 |
2008年 | 56篇 |
2007年 | 89篇 |
2006年 | 68篇 |
2005年 | 76篇 |
2004年 | 71篇 |
2003年 | 68篇 |
2002年 | 67篇 |
2001年 | 25篇 |
2000年 | 31篇 |
1999年 | 33篇 |
1998年 | 28篇 |
1997年 | 31篇 |
1996年 | 31篇 |
1995年 | 41篇 |
1994年 | 35篇 |
1993年 | 26篇 |
1992年 | 23篇 |
1991年 | 17篇 |
1990年 | 24篇 |
1989年 | 15篇 |
1988年 | 10篇 |
1987年 | 14篇 |
1986年 | 13篇 |
1985年 | 12篇 |
1984年 | 16篇 |
1983年 | 24篇 |
1982年 | 31篇 |
1981年 | 16篇 |
1980年 | 21篇 |
1979年 | 13篇 |
1978年 | 16篇 |
1977年 | 15篇 |
1976年 | 11篇 |
1975年 | 15篇 |
1974年 | 15篇 |
1973年 | 8篇 |
排序方式: 共有1983条查询结果,搜索用时 15 毫秒
71.
When head-movement parallax functioned as the sole veridical distance cue during exposure to spectacles that altered the eyes’ oculomotor adjustments, sizable adaptation was obtained. This result showed that a discrimination of the distances of 60 and 30 cm can be based on head-movement parallax. Using adaptation in demonstrating that head-movement parallax can serve as a distance cue circumvents the problem that the presence of accommodation normally presents when such a demonstration is attempted. The usual contamination of head-movement parallax with accommodation is avoided, because accommodation is altered by the spectacles and does pot function as a veridical cue along with head-movement parallax. 相似文献
72.
W.Curtis Banks Kenneth R Stitt Harriet Ann Curtis Gregory V McQuater 《Journal of experimental social psychology》1977,13(5):452-463
Two experiments were conducted to investigate the effects of positive and negative reinforcements upon black college students. In the first experiment subjects received either positive or negative reinforcement from a black or a white Evaluator. Behavioral change (compliance) was greater in response to negative reinforcement from a black Evaluator than in response to negative reinforcement from a white Evaluator, while there were no divergent effects of Evaluator's Race upon compliance with positive reinforcement. The same pattern obtained in subjects' self-evaluations. The second experiment offered a test of the hypothesis that the objectivity of black Evaluators was perceived as greater than that of white Evaluators, and that a manipulation aimed at equating the Evaluators on objectivity would attenuate the effects of Evaluator's Race upon compliance and self-evaluation in response to negative reinforcement. These hypotheses were generally supported by the results. 相似文献
73.
Mary Ann Records Raymond C. Heimbuch Kenneth K. Kidd 《Journal of Fluency Disorders》1977,2(4):271-282
A handedness questionnaire was administered to 446 stutterers and a control group. No significant male/female or stutterer/control effects were found, although both males and stutterers tended to be less right handed. The slight sex effect in handedness is consistent with previously reported studies and with cerebral structural and functional asymmetries. 相似文献
74.
Trudylee G. Rowbury Ann M. Baer Donald M. Baer 《Journal of applied behavior analysis》1976,9(1):85-104
Token-mediated access to play and snacks was made contingent on completion of academic tasks in the Baseline Experiment. This contingency produced stable completion rates that were subsequently doubled, and then tripled, for four deviant children in a special preschool. A reversal design demonstrated that the contingency was functional in maintaining the children's rates of task completion. The Guidance Experiment examined the role of a social event, teacher guidance, in the acquisition of task-completion skills, in a multiple-baseline-across-tasks design (with reversals). The analysis demonstrated that teacher guidance was an important supplement to the token-mediated contingency in establishing significant increases in task completions for a second group of three deviant children in the special class. The importance of teacher guidance was related to the difficulty level of the children's tasks. 相似文献
75.
Ann S. Masten 《International journal of psychology》2021,56(1):1-11
Interest in resilience is surging in research, policy and practice as threats from disasters rise and humanity confronts a global pandemic. This commentary highlights the importance of defining resilience for portability across system levels and disciplines in order to integrate knowledge and prepare adequately for the challenges posed to children and youth by multisystem disasters. A scalable definition of resilience is recommended: The capacity of a dynamic system to adapt successfully to challenges that threaten the function, survival or development of the system. Major determinants of adaptation among young people in the context of disaster are highlighted, including variations in adversity exposure dose, developmental timing, individual differences and the socio-ecological systems of children's lives that can be mobilised in response. Adaptation of children in disasters depends on the resilience of interconnected systems, including families, schools, communities and policy sectors. Implications of a multisystem perspective for disaster risk reduction and preparedness are discussed with a focus on nurturing the resilience of children and their societies for challenges in the near term and long into the future. 相似文献
76.
Burgess B. Edwin Mrug Sylvie Bray Leigh Ann Leon Kevin J. Troxler Robert Bradley 《Journal of religion and health》2021,60(3):1818-1831
Journal of Religion and Health - Religiosity and spirituality predict lower alcohol and other substance use in community samples of adolescents and adults. However, the roles of religiosity and... 相似文献
77.
We investigated ADHD symptoms and CU traits as predictors of violent media use in adolescence, controlling for delinquency and ODD symptoms. The effects on of disinhibition and arousal to negative stimuli, core characteristics of ADHD symptoms and CU traits, and of gender were investigated. At age 15, 88 adolescents, 50 % boys reported on CU traits, ADHD symptoms and delinquency. Parents rated the adolescents’ CU traits, ADHD‐ and ODD symptoms. At age 16, adolescents reported on their media habits and performed tests of disinhibition and arousal to negative stimuli. Boys had higher levels of CU traits and violent media use and girls had higher levels of arousal to negative pictures. CU traits and inattention symptoms predicted violent media use, the latter association applying only to boys, with CU traits being the strongest predictor. Low arousal to threat pictures explained variance in violent media use, above CU traits. Attraction to violent media seems affected by problem behaviors, with CU traits coming forth as especially important. 相似文献
78.
79.
The Health Humanities Consortium (HHC) was established in 2015 to “promote health humanities scholarship, education, and practice through transdisciplinary methods and theories that focus on the intersection of the arts and humanities, health, illness, and healthcare.” As the founding co-chairs of the HHC, we provide a history of the founding of this organization in this article, describing the journey of its creation, the choices and challenges it faced as a new organization, and our hopes for a rich future.
相似文献80.
Journal of Medical Humanities - 相似文献