全文获取类型
收费全文 | 8237篇 |
免费 | 394篇 |
国内免费 | 246篇 |
专业分类
8877篇 |
出版年
2024年 | 17篇 |
2023年 | 143篇 |
2022年 | 66篇 |
2021年 | 135篇 |
2020年 | 216篇 |
2019年 | 248篇 |
2018年 | 189篇 |
2017年 | 230篇 |
2016年 | 205篇 |
2015年 | 187篇 |
2014年 | 199篇 |
2013年 | 630篇 |
2012年 | 134篇 |
2011年 | 184篇 |
2010年 | 143篇 |
2009年 | 198篇 |
2008年 | 222篇 |
2007年 | 190篇 |
2006年 | 207篇 |
2005年 | 168篇 |
2004年 | 148篇 |
2003年 | 146篇 |
2002年 | 129篇 |
2001年 | 83篇 |
2000年 | 71篇 |
1999年 | 46篇 |
1998年 | 55篇 |
1997年 | 21篇 |
1996年 | 42篇 |
1995年 | 38篇 |
1994年 | 30篇 |
1993年 | 19篇 |
1992年 | 19篇 |
1990年 | 6篇 |
1989年 | 10篇 |
1988年 | 7篇 |
1987年 | 7篇 |
1985年 | 342篇 |
1984年 | 405篇 |
1983年 | 294篇 |
1982年 | 308篇 |
1981年 | 346篇 |
1980年 | 360篇 |
1979年 | 339篇 |
1978年 | 366篇 |
1977年 | 290篇 |
1976年 | 266篇 |
1975年 | 259篇 |
1974年 | 273篇 |
1973年 | 235篇 |
排序方式: 共有8877条查询结果,搜索用时 15 毫秒
911.
Stephen M. Schueller Eranda Jayawickreme Laura E.R. Blackie Marie J.C. Forgeard Ann Marie Roepke 《The journal of positive psychology》2015,10(1):53-63
People can experience positive changes even in the midst of adversity and loss. We investigated character strengths following three recent shooting tragedies. Using an Internet database of respondents to the Values in Action Inventory of Strengths (VIA-IS), we compared responses from three groups of participants (N?=?31,429) within close proximity of each event: those who completed it eight months prior to the event, and one month and two months after. Results suggested that for one of the events, participants who completed the VIA-IS after the event showed slightly different levels of self-reported character strengths compared to participants who completed the VIA-IS before the event, with some mean levels higher and others lower. The observed differences in character strengths were inconsistent across follow-up periods, and effect sizes were small (d values from –0.13 to 0.15). These findings raise questions about whether and how tragedies might catalyze differences in character strengths. 相似文献
912.
913.
Antonios Dakanalis Laura Favagrossa Massimo Clerici Antonio Prunas Fabrizia Colmegna M. Assunta Zanetti 《The Journal of psychology》2015,149(1):85-112
ABSTRACT. Although body dissatisfaction is recognized as the strongest risk factor for eating disturbances, a majority of young males are body dissatisfied, but do not concomitantly report severe levels of eating disorder symptomatology. The present investigation was designed to examine five theoretically relevant variables (i.e., body checking, emotional dysregulation, perfectionism, insecure-anxious attachment, and self-esteem) as potential moderators of the relationship between body dissatisfaction and two critical components of male eating disorder symptomatology: drive for muscularity and bulimic behaviors. Data collected from 551 Italian males between 18 and 28 years old were analyzed using latent structural equation modeling. The authors found that emotional dysregulation, body checking, insecure-anxious attachment and perfectionism intensified the relationship between body dissatisfaction and each criterion variable representing male eating disorder symptomatology; the interactions accounted respectively for an additional 2%, 7%, 4% and 5% of variance in drive for muscularity and for an additional 6%, 4%, 5%, and 2% of the variance in bulimic behaviors. By contrast self-esteem weakened this relationship and the interactions accounted for an additional 3% of the variance in both drive for muscularity and bulimic behaviors. Implications of these findings for prevention and treatment of male eating disturbances are discussed. 相似文献
914.
Longitudinal Impact of a Family Critical Time Intervention on Children in High-Risk Families Experiencing Homelessness: A Randomized Trial 下载免费PDF全文
Marybeth Shinn Judith Samuels Sean N. Fischer Amanda Thompkins Patrick J. Fowler 《American journal of community psychology》2015,56(3-4):205-216
A randomized trial compared effects of a Family Critical Time Intervention (FCTI) to usual care for children in 200 newly homeless families in which mothers had diagnosable mental illness or substance problems. Adapted from an evidence‐based practice to prevent chronic homelessness for adults with mental illnesses, FCTI combines housing and structured, time‐limited case management to connect families leaving shelter with community services. Families were followed at five time points over 24 months. Data on 311 children—99 ages 1.5–5 years, 113 ages 6–10 years, and 99 ages 11–16 years—included mother‐, teacher‐, and child‐reports of mental health, school experiences, and psychosocial well‐being. Analyses used hierarchical linear modeling to investigate intervention effects and changes in child functioning over time. Referral to FCTI reduced internalizing and externalizing problems in preschool‐aged children and externalizing for adolescents 11–16. The intervention led to declines in self‐reported school troubles for children 6–10 and 11–16. Both experimental and control children in all age groups showed reductions in symptoms over time. Although experimental results were scattered, they suggest that FCTI has the potential to improve mental health and school outcomes for children experiencing homelessness. 相似文献
915.
Gay-Straight Alliances Vary on Dimensions of Youth Socializing and Advocacy: Factors Accounting for Individual and Setting-Level Differences 下载免费PDF全文
V. Paul Poteat Jillian R. Scheer Robert A. Marx Jerel P. Calzo Hirokazu Yoshikawa 《American journal of community psychology》2015,55(3-4):422-432
Gay‐Straight Alliances (GSAs) are school‐based youth settings that could promote health. Yet, GSAs have been treated as homogenous without attention to variability in how they operate or to how youth are involved in different capacities. Using a systems perspective, we considered two primary dimensions along which GSAs function to promote health: providing socializing and advocacy opportunities. Among 448 students in 48 GSAs who attended six regional conferences in Massachusetts (59.8 % LGBQ; 69.9 % White; 70.1 % cisgender female), we found substantial variation among GSAs and youth in levels of socializing and advocacy. GSAs were more distinct from one another on advocacy than socializing. Using multilevel modeling, we identified group and individual factors accounting for this variability. In the socializing model, youth and GSAs that did more socializing activities did more advocacy. In the advocacy model, youth who were more actively engaged in the GSA as well as GSAs whose youth collectively perceived greater school hostility and reported greater social justice efficacy did more advocacy. Findings suggest potential reasons why GSAs vary in how they function in ways ranging from internal provisions of support, to visibility raising, to collective social change. The findings are further relevant for settings supporting youth from other marginalized backgrounds and that include advocacy in their mission. 相似文献
916.
Michela Lenzi Alessio Vieno Gianmarco Altoè Luca Scacchi Douglas D. Perkins Rita Zukauskiene Massimo Santinello 《American journal of community psychology》2015,55(3-4):444-454
The findings on the association between Social Networking Sites and civic engagement are mixed. The present study aims to evaluate a theoretical model linking the informational use of Internet‐based social media (specifically, Facebook) with civic competencies and intentions for future civic engagement, taking into account the mediating role of civic discussions with family and friends and sharing the news online. Participants were 114 Italian high school students aged 14–17 years (57 % boys). Path analysis was used to evaluate the proposed theoretical model. Results showed that Facebook informational use was associated with higher levels of adolescent perceived competence for civic action, both directly and through the mediation of civic discussion with parents and friends (offline). Higher levels of civic competencies, then, were associated with a stronger intention to participate in the civic domain in the future. Our findings suggest that Facebook may provide adolescents with additional tools through which they can learn civic activities or develop the skills necessary to participate in the future. 相似文献
917.
The proposed assessment sheet aims to show in detail, which qualitative elements of motor performance are performed correctly in the 2nd month of life by children who in the 9th month reached the erect posture. Similar analysis was performed for the qualitative assessment in the 6th month. The prospective investigation of motor development involved a group of 109 children (40 girls and 69 boys). The study was based on the previously described quantity and quality assessment sheet of motor performance, validated for the 2nd and 6th month. Final investigation took place in the 9th month of life and was based on a neurological assessment.It could be shown that a completely correct assessment at the age of 2 months precludes future severe motor development disorders, especially cerebral palsy, although it does not rule out a slight delay. Prematurity and the analyzed risk factors, particularly IVH, impair the motor performance. The absence of axial symmetry, the shoulders protraction and improper position of the pelvis are the most important alarming features at the 2nd month. Distal elements observed in the prone position at the 6th month show a good prognosis for the motor performance in the 9th month. Any abnormalities, mainly related to the body axis and symmetry observed at 2 months of age should encourage one to put a child under observation. 相似文献
918.
Non‐Bayesian Noun Generalization in 3‐ to 5‐Year‐Old Children: Probing the Role of Prior Knowledge in the Suspicious Coincidence Effect 下载免费PDF全文
Gavin W. Jenkins Larissa K. Samuelson Jodi R. Smith John P. Spencer 《Cognitive Science》2015,39(2):268-306
It is unclear how children learn labels for multiple overlapping categories such as “Labrador,” “dog,” and “animal.” Xu and Tenenbaum (2007a) suggested that learners infer correct meanings with the help of Bayesian inference. They instantiated these claims in a Bayesian model, which they tested with preschoolers and adults. Here, we report data testing a developmental prediction of the Bayesian model—that more knowledge should lead to narrower category inferences when presented with multiple subordinate exemplars. Two experiments did not support this prediction. Children with more category knowledge showed broader generalization when presented with multiple subordinate exemplars, compared to less knowledgeable children and adults. This implies a U‐shaped developmental trend. The Bayesian model was not able to account for these data, even with inputs that reflected the similarity judgments of children. We discuss implications for the Bayesian model, including a combined Bayesian/morphological knowledge account that could explain the demonstrated U‐shaped trend. 相似文献
919.
AbstractIn this introduction to the issue Semiotic tools in early mathematical knowledge, we offer a theoretical perspective that provides meaning to the different contributions. We begin by reviewing three perspectives bearing an important influence on the study of mathematical development in childhood (the Piagetian, the information processing and the neonativist perspectives). Next, we underscore the need for developmental studies in this domain to consider the semiotic component, and hence the socio-cultural component, in depth. The contributions that form this volume — a theoretical article, five papers and four short reports of empirical studies and a review of an instructional approach — illustrate different ways of including the semiotic component in the study of children’s mathematical knowledge. 相似文献
920.
Michelle C. Muratori Carol Klose Smith 《Journal of counseling and development : JCD》2015,93(2):173-182
The authors highlight challenges that gifted individuals may encounter in their career development and propose a theory‐informed career counseling framework to help guide them through the process. Special consideration is given to issues that may be salient for gifted individuals in career counseling sessions. Uncontrollable factors that might influence their career decision making, including socioeconomic status, race, gender, and sexual orientation, are also addressed. 相似文献