全文获取类型
收费全文 | 1957篇 |
免费 | 127篇 |
出版年
2021年 | 22篇 |
2020年 | 30篇 |
2019年 | 36篇 |
2018年 | 46篇 |
2017年 | 64篇 |
2016年 | 49篇 |
2015年 | 43篇 |
2014年 | 45篇 |
2013年 | 180篇 |
2012年 | 74篇 |
2011年 | 69篇 |
2010年 | 54篇 |
2009年 | 59篇 |
2008年 | 95篇 |
2007年 | 71篇 |
2006年 | 63篇 |
2005年 | 72篇 |
2004年 | 71篇 |
2003年 | 60篇 |
2002年 | 56篇 |
2001年 | 61篇 |
2000年 | 67篇 |
1999年 | 58篇 |
1998年 | 33篇 |
1997年 | 28篇 |
1996年 | 29篇 |
1995年 | 25篇 |
1994年 | 20篇 |
1993年 | 24篇 |
1992年 | 24篇 |
1991年 | 26篇 |
1990年 | 22篇 |
1989年 | 21篇 |
1988年 | 18篇 |
1987年 | 28篇 |
1986年 | 15篇 |
1985年 | 19篇 |
1984年 | 18篇 |
1981年 | 12篇 |
1980年 | 13篇 |
1979年 | 18篇 |
1978年 | 12篇 |
1977年 | 15篇 |
1976年 | 13篇 |
1974年 | 19篇 |
1971年 | 14篇 |
1968年 | 12篇 |
1967年 | 12篇 |
1966年 | 18篇 |
1965年 | 14篇 |
排序方式: 共有2084条查询结果,搜索用时 15 毫秒
151.
152.
153.
Sean Lauer Lori Wilkinson Miu Chung Yan Rick Sin A. Ka Tat Tsang 《Journal of International Migration and Integration》2012,13(1):1-19
Finding a job has become a critical challenge to many youth. Immigrant youth, who have been a key part of the global migrants, are particularly vulnerable when entering the job market of the host country due to various structural barriers. However, in both public policy discourse and research, their labour market experience tends to be overlooked. In this paper, we report the employment experience of recently arrived immigrant youth based on an analysis of the LSIC and findings of in-depth interviews of 82 immigrant youth in four cities in Canada. Our results reveal that recently arrived immigrant youth tend to work in lower-skilled employment, experience significant delays in finding employment, have difficulties with foreign credential recognition, and have fewer means to access to job markets. 相似文献
154.
The roles of belief in a just world (BJW) and discrimination against ones' group in perceptions of personal discrimination were examined. Female participants (n = 63) were personally discriminated against in a laboratory setting. We manipulated whether the experimenter appeared to discriminate against other participants, which presumably made the presence of personal discrimination less ambiguous, or did not appear to discriminate against others, which presumably made personal discrimination more ambiguous. In the no group discrimination condition, but not in the group discrimination condition, participants' perceptions of being personally discriminated against depended on individual differences in BJW: Women with a strong BJW perceived less personal discrimination than those with a weak BJW. Also, strong BJW women in the group discrimination condition perceived less personal discrimination than strong BJW women in the no group discrimination condition. 相似文献
155.
Aimee Harris T. Mary Foster Joshua Levine William Temple 《Journal of the experimental analysis of behavior》2012,98(3):295-309
Domestic hens responded under multiple fixed‐ratio fixed‐ratio schedules with equal fixed ratios. One component provided immediate reinforcement and the other provided reinforcement after a delay, signaled by the offset of the key light. The components were presented quasirandomly so that all four possible transitions occurred in each session. The delay was varied over 0, 4, 8, 16, and 32 s with fixed‐ratio 5 schedules, and over 0, 8 and 32 s with fixed‐ratio 1, 15 and 40 schedules. Main effects of fixed‐ratio value and delay duration were detected on between‐ratio pauses. Pauses were longer when the multiple‐schedule stimulus correlated with a delayed‐reinforcer component was presented, with the longest pauses occurring at the transition from a component with an immediate reinforcer to one with a delayed reinforcer. Pause durations were shortest during immediate components. Overall, both the presence or absence of a delay in the upcoming component, and the presence or absence of a delay in the preceding component affected pause length, but the upcoming delay had the larger effect. Thus changes in delay had similar effects to past reports of the effects of changes in response force, response requirement, and reinforcer magnitude in multiple fixed‐ratio fixed‐ratio schedules. 相似文献
156.
Schechter JC Brennan PA Cunningham PB Foster SL Whitmore E 《Journal of abnormal child psychology》2012,40(6):913-922
Stress and hypothalamic-pituitary-adrenal (HPA) axis dysregulation have been associated with externalizing behavior in adolescence, but few studies have examined these factors in a treatment context. This study investigated the relationship between stress, cortisol, and externalizing behavior among 120 adolescent males (mean age?=?15) receiving Multisystemic Therapy (MST). To examine the differential relationship of cortisol with various types of stressors, self-report measures assessed lifetime stress, current episodic stress, and daily hassles. Morning and afternoon cortisol samples were collected to examine whether the relationship between stress and treatment outcome depended on the youth's biological stress levels. Regression analyses indicated that awakening cortisol levels moderated the relationship between daily hassles and externalizing behaviors at post-treatment. More specifically, higher levels of daily hassles predicted worse outcomes only among adolescents with high levels of morning cortisol. In addition, lifetime stressors and afternoon measures of cortisol interacted to predict changes in caretaker reports of externalizing problems and youth arrests following treatment; lifetime stressors were positively associated with externalizing behavior when adolescents had low levels of afternoon cortisol. Implications for theory and future directions for evidence-based treatment are discussed. 相似文献
157.
James Thompson 《Personality and individual differences》2012,53(2):157-161
An evaluation is presented of Lynn’s work on national differences in personality, race differences in intelligence, national IQs & economic development, correlates of national IQs, the Flynn effect, sex differences, eugenics and dysgenics, race differences in psychopathic personality, and intelligence of the Jews. 相似文献
158.
The purpose of this study was to test a model based on Social Cognitive Career Theory (Lent, Brown, & Hackett, 1994) that placed perceived social status as an antecedent of career-related learning experiences, self-efficacy, and outcome expectations. Gender was included in the present model and results indicated that gender related as expected to differential exposure to career-related learning experiences in Holland's (1997) RIASEC domains. After controlling for the effects of gender, results demonstrated that perceived social status related positively to learning experiences in the Investigative, Enterprising, and Conventional areas among 380 college students. Further, these enhanced learning experiences mediated the relationships between perceived social status and self-efficacy, and between perceived social status and outcome expectations, for the Investigative, Enterprising, and Conventional areas. These findings highlight the importance of perceived social status as a predictor of exposure to different types of career-related learning experiences that subsequently shape students' self-efficacy, outcome expectations, and (presumably) interests in particular RIASEC areas. Results are discussed in terms of exposure to career-related learning experiences in RIASEC domains with differing levels of prestige and implications of these results for developing interventions to enhance the learning experiences of students who report lower levels of perceived social status are presented. 相似文献
159.
Campbell JI Thompson VA 《Journal of experimental psychology. Learning, memory, and cognition》2012,38(1):118-129
Retrieval-induced forgetting (RIF) is a widely studied phenomenon of human memory, but RIF of arithmetic facts remains relatively unexplored. In 2 experiments, we investigated RIF of simple addition facts (2 + 3 = 5) from practice of their multiplication counterparts (2 × 3 = 6). In both experiments, robust RIF expressed in response times occurred only for high-strength small-number addition facts with sums ≤ 10, indicating that RIF from multiplication practice was interference dependent. RIF of addition-fact memory was produced by multiplication retrieval (2 × 3 = ?) but not multiplication study (2 × 3 = 6), supporting an inhibitory mechanism of RIF in arithmetic memory. Finally, RIF occurred with multiplication practiced in word format (three × four) and addition tested later in digit format (3 + 4), which provides evidence that digit and written-word formats for arithmetic accessed a common semantic retrieval network. The results support the view that addition and multiplication facts are stored in an interrelated semantic network and that RIF of competing addition facts is an intrinsic process of multiplication fact retrieval. 相似文献
160.
Kam CM Greenberg MT Bierman KL Coie JD Dodge KA Foster ME Lochman JE McMahon RJ Pinderhughes EE;Conduct Problems Prevention Research Group 《Journal of abnormal child psychology》2011,39(3):365-377
This longitudinal study examined processes that mediate the association between maternal depressive symptoms and peer social
preference during the early school years. Three hundred and fifty six kindergarten children (182 boys) and their mothers participated
in the study. During kindergarten, mothers reported their level of depressive symptomatology. In first grade, teachers rated
children’s emotion regulation at school and observers rated the affective quality of mother-child interactions. During second
grade, children’s social preference was assessed by peer nomination. Results indicated that mothers’ level of depressive symptomatology
negatively predicted their child’s social preference 2 years later, controlling for the family SES and teacher-rated social
preference during kindergarten. Among European American families, the association between maternal depressive symptoms and
social preference was partially mediated by maternal warmth and the child’s emotion regulation. Although the relation between
maternal depressive symptoms and children peer preference was stronger among African American families than Europrean American
families, its mediation by the maternal warmth and child’s emotion regulation was not found in African American families. 相似文献