全文获取类型
收费全文 | 766篇 |
免费 | 41篇 |
出版年
2023年 | 3篇 |
2022年 | 6篇 |
2021年 | 7篇 |
2020年 | 15篇 |
2019年 | 16篇 |
2018年 | 19篇 |
2017年 | 19篇 |
2016年 | 26篇 |
2015年 | 21篇 |
2014年 | 28篇 |
2013年 | 85篇 |
2012年 | 38篇 |
2011年 | 41篇 |
2010年 | 16篇 |
2009年 | 27篇 |
2008年 | 43篇 |
2007年 | 37篇 |
2006年 | 39篇 |
2005年 | 31篇 |
2004年 | 32篇 |
2003年 | 21篇 |
2002年 | 23篇 |
2001年 | 7篇 |
2000年 | 8篇 |
1999年 | 12篇 |
1998年 | 10篇 |
1997年 | 8篇 |
1996年 | 14篇 |
1995年 | 7篇 |
1994年 | 7篇 |
1993年 | 13篇 |
1992年 | 6篇 |
1991年 | 9篇 |
1990年 | 7篇 |
1989年 | 10篇 |
1988年 | 5篇 |
1987年 | 4篇 |
1986年 | 7篇 |
1985年 | 6篇 |
1984年 | 10篇 |
1983年 | 2篇 |
1982年 | 9篇 |
1981年 | 11篇 |
1980年 | 9篇 |
1979年 | 4篇 |
1978年 | 9篇 |
1977年 | 4篇 |
1974年 | 3篇 |
1971年 | 2篇 |
1967年 | 5篇 |
排序方式: 共有807条查询结果,搜索用时 15 毫秒
141.
142.
143.
144.
145.
Sarah E. Ritvo Suzanne E. MacDonald 《Journal of the experimental analysis of behavior》2020,113(2):419-434
Empirical investigations of humans, pigeons, rats, and monkeys have indicated that these species will select free over forced choice, even when faced with identical outcomes. However, the same has yet to be quantitatively confirmed in nonhuman great apes. This experiment is the first systematic investigation of preference for free or forced choice in great apes using a paradigm in which extraneous variables are highly controlled. Three orangutans were given a choice of one of two virtual routes, one that provided a choice and one that did not via a touchscreen computer program. Choice of either route was rewarded with the same type and quantity of food. Initial results indicated a preference for free choice across all three participants. However, in two control conditions, orangutans' preferences varied, suggesting a weaker tendency to exercise choice than species previously tested. We suggest further investigation of preference for free and forced choice in orangutans and other great apes through alternative experimental paradigms that focus on increasing the fidelity of free and forced choice options. 相似文献
146.
147.
148.
This study examines whether the first group member to advocate a position in the group publically has disproportionate influence on the group decision, and whether group discussion by computer mail or face-to-face determines the extent of the first advocate's influence. Possible explanations of first advocacy influence were tested in an experiment that allowed simultaneous observation of three independent variables: (1) assignment of first advocate (self-selected/randomly assigned), (2) early discussion before advocacy (discussion/no discussion), and (3) mode of communication (face-to-face/electronic mail). It was assumed that a first advocate effect exists if the group choice is closer to the first advocates' stated positions than to the group's average pregroup preferences. An “influence” hypothesis predicts that first advocates who self-select will be closer to the group decision than average pregroup preferences because these are first advocates most likely to persuade other members of the group. A “listening” hypothesis predicts that first advocates who hear an early group discussion will be closer to the group decision than average pregroup preferences because these first advocates are able to anticipate the group decision as a result of listening to what is communicated in group discussion. The results indicated strong support for the “listening” hypothesis. When groups held early discussions before someone advocated a position, the first advocate effect was observed; when groups did not hold early discussions but began their task by having someone advocate a position, there was no first advocate effect. The data suggest that the content and tone of electronic group discussions was qualitatively different from face-to-face group discussions, but the process of group decision making in both conditions was about the same. The implications of these results for group discussion and computer-mediated group decision making in organizations are discussed. 相似文献
149.
James T. Yoe Ph.D. Suzanne Santarcangelo Ph.D. Margaret Atkins B.S.W. John D. Burchard Ph.D. 《Journal of child and family studies》1996,5(1):23-37
Over the past decade, there has been a dramatic shift in the provision of mental health services to children, adolescents, and their families. This shift has been marked by a movement away from restrictive treatment options toward the development of comprehensive community-based systems of care designed to keep the most challenging children in their homes, schools, and communities. Based on a model of intensive case management referred to as Wraparound Care, Vermont's statewide approach emphasizes aggressive outreach, use of the least restrictive treatment options, and care that is flexible, unconditional, and child- and family-centered. We chart the development of Vermont's Wraparound Care Initiative and present residential, educational, and behavioral outcome data for a cohort of 40 youth receiving Wraparound Care over a 12-month period. The results showed that after 12-months, youth who had been previously removed from their homes or were at imminent risk of such removal, were residing in significantly less restrictive community-based living arrangements and exhibiting significantly fewer problem behaviors than at intake. These results are discussed in light of recent national studies and previous studies on similar cohorts of Vermont youth receiving Wraparound Care. 相似文献
150.
Miron Zuckerman C. Raymond Knee Suzanne C. Kieffer Laird Rawsthome Laura M. Bruce 《Journal of personality》1996,64(2):435-464
ABSTRACT Scales were constructed to measure perceived control over controllable events (realistic control) and perceived control over uncontrollable events (unrealistic control). Internal reliability, test-retest reliability, and discriminant validity of both scales were adequate. Study 1 measured perceived personal control over hassles that judges rated on general controllability. For hassles very high in controllability, perceived personal control was related to belief in realistic control but not to belief in unrealistic control; for hassles very low in controllability, perceived personal control was related to belief in unrealistic control but not to belief in realistic control. Study 2 showed that participants high in unrealistic control belief (but not those high in realistic control belief) persevered more on a task that was in part uncontrollable. Study 3 showed that the combination of low realistic control belief and high unrealistic control belief predicted poorer future health, particularly for participants who have reported the experience of many negative events and/or hassles. The conditions under which unrealistic control results in maladaptive outcomes are discussed. 相似文献