全文获取类型
收费全文 | 1516篇 |
免费 | 53篇 |
出版年
2021年 | 8篇 |
2020年 | 31篇 |
2019年 | 25篇 |
2018年 | 28篇 |
2017年 | 34篇 |
2016年 | 44篇 |
2015年 | 37篇 |
2014年 | 26篇 |
2013年 | 192篇 |
2012年 | 61篇 |
2011年 | 66篇 |
2010年 | 29篇 |
2009年 | 42篇 |
2008年 | 53篇 |
2007年 | 49篇 |
2006年 | 51篇 |
2005年 | 43篇 |
2004年 | 52篇 |
2003年 | 46篇 |
2002年 | 57篇 |
2001年 | 28篇 |
2000年 | 16篇 |
1999年 | 23篇 |
1998年 | 21篇 |
1997年 | 20篇 |
1996年 | 26篇 |
1995年 | 23篇 |
1994年 | 21篇 |
1993年 | 29篇 |
1992年 | 16篇 |
1991年 | 28篇 |
1990年 | 19篇 |
1989年 | 17篇 |
1988年 | 24篇 |
1987年 | 19篇 |
1986年 | 17篇 |
1985年 | 22篇 |
1984年 | 13篇 |
1983年 | 25篇 |
1982年 | 23篇 |
1981年 | 25篇 |
1980年 | 15篇 |
1979年 | 14篇 |
1978年 | 19篇 |
1977年 | 19篇 |
1976年 | 14篇 |
1975年 | 8篇 |
1974年 | 8篇 |
1973年 | 7篇 |
1972年 | 5篇 |
排序方式: 共有1569条查询结果,搜索用时 15 毫秒
71.
Procedures for observing, coding, and analyzing parent-infant interactions are described. Sample data are presented to illustrate the outcome of these procedures and the manner in which developmental issues can be addressed using the hardware and software systems described. 相似文献
72.
73.
74.
OBJECTIVE: The premise that pessimistic health appraisals compromise well-being whereas optimistic appraisals are compensatory was examined in a longitudinal study of 232 community-dwelling older adults (ages 79-98 years). DESIGN: Subjective health (SH) appraisals were contrasted with objective health (OH) to identify realists, whose ratings were congruent (SH = OH), distinguishing them from health pessimists (SH < OH) and health optimists (SH > OH), whose ratings were incongruent. Analyses of covariance were used to examine group differences 2 years later on well-being and health care. MAIN OUTCOME MEASURES: Outcome measures were psychological well-being (life satisfaction, positive and negative emotions), functional well-being (objective and perceived physical activity, activity restriction), and health care (health care management, hospital admissions, length of hospital stays). RESULTS: Compared with realists, pessimists had significantly poorer outcomes and optimists had better outcomes. Because perceived control (PC) was weaker among pessimists and stronger among optimists, supplemental analysis determined whether PC differences explained these findings. When accounting for PC, many pessimism and optimism effects became nonsignificant, yet effects on functional well-being remained unchanged. CONCLUSION: Findings have implications for older adults at risk of functional decline. 相似文献
75.
Judith L. Lauter 《Brain and cognition》1984,3(3):259-280
Recent experience with attempts to test relatively simple patterns such as three-tone sequences in a traditional dichotic-listening paradigm indicates that when such sequences are used for both target and contralateral interference, performance tends to be low in both ears and not useful for measuring or comparing ear advantages in various target conditions. It is reported that tests with a variety of sounds presented contralaterally to three-element patterns show that several such sounds can (1) allow performance in at least one ear to remain above floor values, (2) result in performance in at least one ear that is below ceiling, and (3) reveal ear advantages that are similar in direction and magnitude to those seen with the traditional dichotic paradigm. 相似文献
76.
Judith A. Geoghegan 《Journal of Employment Counseling》1980,17(2):326-327
77.
78.
Curiosity – broadly defined as the desire to acquire new information – enhances learning and memory in adults. In addition, interest in the information (i.e., when the information is processed) can also facilitate later memory. To date, it is not known how states of pre‐information curiosity and post‐information interest enhance memory in childhood and adolescence. We used a trivia paradigm in which children and adolescents (N = 60, 10–14 years) encoded trivia questions and answers associated with high or low curiosity. States of high pre‐answer curiosity enhanced later memory for trivia answers in both children and adolescents. However, higher positive post‐answer interest enhanced memory for trivia answers beyond the effects of curiosity more strongly in adolescents than in children. These results suggest that curiosity and interest have positive effects on learning and memory in childhood and adolescence, but might need to be harnessed in differential ways across child development to optimize learning. 相似文献
79.
80.
Over the last 15 years, researchers have been increasingly interested in understanding the nature and development of children’s selective trust. Three meta‐analyses were conducted on a total of 51 unique studies (88 experiments) to provide a quantitative overview of 3‐ to 6‐year‐old children’s selective trust in an informant based on the informant’s epistemic or social characteristics, and to examine the relation between age and children’s selective trust decisions. The first and second meta‐analyses found that children displayed medium‐to‐large pooled effects in favor of trusting the informant who was knowledgeable or the informant with positive social characteristics. Moderator analyses revealed that 4‐year‐olds were more likely to endorse knowledgeable informants than 3‐year‐olds. The third meta‐analysis examined cases where two informants simultaneously differed in their epistemic and social characteristics. The results revealed that 3‐year‐old children did not selectively endorse informants who were more knowledgeable but had negative social characteristics over informants who were less knowledgeable but had positive social characteristics. However, 4‐ to 6‐year‐olds consistently prioritized epistemic cues over social characteristics when deciding who to trust. Together, these meta‐analyses suggest that epistemic and social characteristics are both valuable to children when they evaluate the reliability of informants. Moreover, with age, children place greater value on epistemic characteristics when deciding whether to endorse an informant’s testimony. Implications for the development of epistemic trust and the design of studies of children’s selective trust are discussed. 相似文献