全文获取类型
收费全文 | 1713篇 |
免费 | 60篇 |
专业分类
1773篇 |
出版年
2023年 | 11篇 |
2022年 | 8篇 |
2020年 | 21篇 |
2019年 | 21篇 |
2018年 | 32篇 |
2017年 | 36篇 |
2016年 | 44篇 |
2015年 | 46篇 |
2014年 | 34篇 |
2013年 | 165篇 |
2012年 | 64篇 |
2011年 | 66篇 |
2010年 | 46篇 |
2009年 | 49篇 |
2008年 | 72篇 |
2007年 | 63篇 |
2006年 | 70篇 |
2005年 | 52篇 |
2004年 | 60篇 |
2003年 | 66篇 |
2002年 | 65篇 |
2001年 | 25篇 |
2000年 | 23篇 |
1999年 | 29篇 |
1998年 | 37篇 |
1997年 | 38篇 |
1996年 | 25篇 |
1995年 | 33篇 |
1994年 | 31篇 |
1993年 | 34篇 |
1992年 | 32篇 |
1991年 | 23篇 |
1990年 | 26篇 |
1989年 | 21篇 |
1988年 | 18篇 |
1987年 | 21篇 |
1986年 | 17篇 |
1985年 | 21篇 |
1984年 | 16篇 |
1983年 | 24篇 |
1982年 | 15篇 |
1981年 | 26篇 |
1980年 | 23篇 |
1979年 | 25篇 |
1978年 | 16篇 |
1977年 | 13篇 |
1976年 | 21篇 |
1975年 | 10篇 |
1974年 | 7篇 |
1973年 | 7篇 |
排序方式: 共有1773条查询结果,搜索用时 0 毫秒
101.
102.
This study examines the prevalence, stability, and contextual correlates of peer victimization in a sample of African-American, Hispanic, and non-Hispanic White urban elementary school-age children. A total of 1956 children (40% African-American, 42% Hispanic, and 18% White) attending any 1 of 14 public elementary schools located in one large and one mid-sized Midwestern city participated in this study. Peer ratings of victimization were obtained at two points in time, separated by a 2-year period. Findings revealed that risk for being victimized by peers varied by ethnicity and by school context. Hispanic children had lower victimization scores than did either African-American or White children. These findings, however, were moderated by school context, such that attending ethnically integrated schools was associated with a significantly higher risk of victimization for White children and a slightly lower risk of victimization for African-American children and did not affect the risk of victimization for Hispanic children. In addition, African-American children were less likely than Hispanic and White children to be repeatedly victimized by peers over time. The importance of considering ethnicity and context in explaining peer victimization is discussed and suggestions for preventive interventions and future research are provided. 相似文献
103.
The effect of sentence priming on picture naming was investigated across the lifespan, from age 3 to 87 years. Names that are normally acquired before 3 years of age were presented in auditory contexts that were semantically congruent, incongruent, or neutral in relation to each picture and its name. Sentential priming was present at all age levels. Facilitation (neutral vs. congruent) was significantly by 4 years of age and did not vary significantly with age. Interference (incongruent vs. neutral) was significant at all age levels, but changed nonmonotonically with age (largest in the youngest children, stable from young adulthood through age 70, with a small increase in the oldest participants). We conclude that picture naming is a useful tool for the investigation of sentential priming effects across the lifespan and that it can reveal potentially interesting developmental changes in the effects of sentential context on word retrieval. 相似文献
104.
105.
Brief multiple-stimulus-without-replacement (MSWO) preference assessments were conducted with 3 adolescent boys with emotional-behavioral disorders in the context of their public school educational program. The reinforcing effects of stimuli identified as high, medium, and low preference were then evaluated using an alternating treatments design in which, following an initial baseline, stimuli were delivered contingent on on-task behavior. High-preference stimuli produced the highest percentages of on-task behavior for all 3 participants. 相似文献
106.
Sixty-two first and second grade students (28 boys, 34 girls) were exposed to one of three commercial videotapes in which either all-boys (traditional condition) or all-girls (nontraditional) were playing with a toy. Participants in the control condition were exposed to nontoy commercials. After exposure to one of the conditions participants performed a toy sort where they were asked if six toys, including the two manipulated toys, were for boys, girls, or both boys and girls. Participants in the nontraditional condition were more likely to report that the manipulated toys were for both boys and girls than were participants in the traditional condition, who were more likely to report that the manipulated toys were for boys. This effect was stronger for boys than for girls. 相似文献
107.
Zimmerman IL Castilleja NF 《Mental retardation and developmental disabilities research reviews》2005,11(3):238-246
The PLS-4 (Preschool Language Scale, 4th edition) is a psychometrically sound instrument constructed to assess language skills in children from birth to 6 years 11 months. It is a useful diagnostic and research tool that can be used to identify current comprehension and expressive language skills and can measure changes in language skills over time. The test is individually administered and includes tasks that assess skills in the areas of preverbal behaviors, as well as linguistic skills in the areas of semantics, morphology, syntax, integrative language skills, and preliteracy skills. Extensive reliability and validity evidence are presented. The test has been used extensively in research examining language development of young children from different home environments, children with identified medical conditions, and children participating in a variety of habilitation and intervention programs. Both the previous edition (PLS-3) and the new PLS-4 English and Spanish editions are used extensively in clinical, medical, and research settings to examine developmental language patterns of infants, toddlers, and preschoolers. 相似文献
108.
Two previous studies found that life stress and parental alcoholism were not as highly related to distress for Hispanic adolescents as they were for European American adolescents (M. Barrera Jr., S. A. Li, and L. Chassin, 1993, 1995). Those findings could be interpreted as evidence of Hispanic youths' resilience, but limitations of the stress measure and the homogeneity of the Hispanic sample threatened this interpretation. The present study improved on those previous studies by using a new measure of uncontrollable stressors and a more heterogeneous Mexican American sample. Participants in this study were 175 Mexican American and 59 European American adolescents and their parents. Unlike the previous studies, results did not show that Mexican American adolescents were more resilient to parental problem drinking or life stress than were European American adolescents. Overall, life stress was related to adolescents', mothers', and fathers' reports of adolescents' psychological distress above and beyond the effects of ethnicity and socioeconomic factors. 相似文献
109.
Plucker JA Robinson NM Greenspon TS Feldhusen JF McCoach DB Subotnik RF 《The American psychologist》2004,59(4):268-9; author reply 269-71
110.
Johansson B Hofer SM Allaire JC Maldonado-Molina MM Piccinin AM Berg S Pedersen NL McClearn GE 《Psychology and aging》2004,19(1):145-156
Change in cognitive abilities was assessed over a 6-year period in a sample of monozygotic and same-sex dizygotic twin pairs (N = 507 individuals), aged 80 and older (mean age = 83.3 years: SD = 3.1). who remained nondemented over the course of the study. Latent growth models (LGMs) show that chronological age and time to death are consistent predictors of decline in measures of memory, reasoning, speed, and verbal abilities. Multivariate LGM analysis resulted in weak and often negative correlations among rates of change between individuals within twin pairs, indicating greater differential change within twin pairs than occurs on average across twin pairs. These findings highlight several challenges for estimating genetic sources of variance in the context of compromised health and mortality-related change. 相似文献