全文获取类型
收费全文 | 12013篇 |
免费 | 505篇 |
国内免费 | 6篇 |
出版年
2023年 | 67篇 |
2022年 | 61篇 |
2021年 | 122篇 |
2020年 | 217篇 |
2019年 | 252篇 |
2018年 | 332篇 |
2017年 | 307篇 |
2016年 | 370篇 |
2015年 | 243篇 |
2014年 | 332篇 |
2013年 | 1308篇 |
2012年 | 562篇 |
2011年 | 556篇 |
2010年 | 408篇 |
2009年 | 417篇 |
2008年 | 581篇 |
2007年 | 562篇 |
2006年 | 500篇 |
2005年 | 431篇 |
2004年 | 466篇 |
2003年 | 423篇 |
2002年 | 413篇 |
2001年 | 178篇 |
2000年 | 195篇 |
1999年 | 185篇 |
1998年 | 188篇 |
1997年 | 157篇 |
1996年 | 107篇 |
1995年 | 146篇 |
1994年 | 143篇 |
1993年 | 131篇 |
1992年 | 123篇 |
1991年 | 111篇 |
1990年 | 109篇 |
1989年 | 106篇 |
1988年 | 110篇 |
1987年 | 107篇 |
1986年 | 85篇 |
1985年 | 101篇 |
1984年 | 116篇 |
1983年 | 97篇 |
1982年 | 110篇 |
1981年 | 115篇 |
1980年 | 104篇 |
1979年 | 102篇 |
1978年 | 109篇 |
1977年 | 89篇 |
1976年 | 93篇 |
1975年 | 64篇 |
1974年 | 76篇 |
排序方式: 共有10000条查询结果,搜索用时 168 毫秒
801.
Surprisingly little research examines whether and how category advertising norms influence the effectiveness of comparative advertising. To address this void, the present research investigates if the persuasiveness of a particular comparative advertisement depends on whether or not it is viewed as a typical tactic that conforms to category advertising norms. Results from experiments 1 and 2 indicate that a comparative advertisement used in violation of category norms results in a persuasion penalty that is evidenced by a reduction in the ad's impact on brand attitudes. This effect of category norms on persuasion is shown to be mediated by evaluations of the comparative advertisement's appropriateness in the product category. A final experiment confirms this persuasion penalty with respect to consumers holding conformity-based motives. However, this penalty is found to be reversed for individuals seeking counter-conformity in the marketplace, who respond more favorably to a comparative advertisement when it violates rather than conforms to category norms. 相似文献
802.
Michael L. Sulkowski Diana K. Joyce Eric A. Storch 《Journal of child and family studies》2012,21(6):938-947
Millions of youth who attend schools in the United States suffer from clinically significant anxiety. Left untreated, these students often experience significant disruptions in their academic, social, and family functioning. Fortunately, promising treatments exist for childhood anxiety that are amenable for delivery in school settings. However, educational law and new service delivery paradigms such as response-to-intervention (RtI) affect the delivery of anxiety interventions. In light of extant laws and practices that govern education, this article discusses the provision of supportive services to address childhood anxiety. Specifically, this article reviews how RtI, the Individuals with Disabilities Education Improvement Act, and Section?504 of the Rehabilitation Act guide service delivery and subsequently impact school-based anxiety treatments. Suggestions are provided to address childhood anxiety within a framework that allows for graduated and fluid service delivery. 相似文献
803.
Michael L. Bloomquist Gerald J. August Susanne S. Lee Timothy F. Piehler Marcia Jensen 《Journal of child and family studies》2012,21(3):368-383
A variety of predictors of parent participation in prevention programming have been identified in past research, but few studies
have investigated how those predictors may vary by implementation context. Patterns of parent participation were examined
in the Early Risers Conduct Problems Prevention Program using two family-focused service delivery models: a community center
model (Center) and an in-home outreach-based model (Outreach). An ethnically diverse sample of Kindergarten through second
grade students (n = 246) displaying elevated levels of aggression were recruited for the study and randomly assigned to either
the Center (n = 121) or Outreach (n = 125) models. In both delivery models, participants and their families completed an assortment
of baseline measures and received family skills and child skills intervention components and family- and school-based case
management. Parents in the Center model demonstrated greater overall participation in family-focused components of the intervention.
Parent motivation with parent-focused expectancies for the intervention represented the strongest predictor of parent participation
across both delivery models. Family income differentially predicted parent participation across the two models, with low income
predicting greater participation in the Center model and lower participation in the Outreach model. A qualitative finding
emerged showing that parents receiving parent skills in the Center model via groups preferred to learn skills related to facilitating
overall family relationships, whereas parents receiving parent skills via individual Outreach meetings preferred to improve
a child’s behavior and emotion skills. Implications are discussed for the design of prevention programming in order to maximize
parent participation in high risk populations. 相似文献
804.
805.
A positive relationship between prior knowledge and item memory is a consistent finding in the literature. In the present
study, we sought to determine whether this relationship extends to episodic details that are present at the time of encoding,
namely source memory. Using a novel experimental design, we were able to show both between- and within-subjects effects of
prior knowledge on source memory. Specifically, the results revealed that the degree of prior knowledge positively predicted
memory for source specifying contextual details. In addition, by including two conditions in which attention was divided either
at encoding or retrieval, we were able to show that prior knowledge influences memory by affecting encoding processes. Overall,
the data suggest that a priori knowledge within a specific domain allows attentional resources to be allocated toward the
encoding of contextual details. 相似文献
806.
Ageism has resulted in overstated expectations regarding the inevitable deterioration in human capabilities, such as visual perception, with age (Rowe and Kahn in Science, 237, 143?C149, 1987; Grant in Health and Social Work, 21, 9?C15, 1996). Human visual perception, however, is of a largely constructive nature, evidenced in the complementary interactions between top-down inputs (e.g., expectations) and bottom-up stimuli (Engel et al. in National Review of Neuroscience, 2(10), 704?C716, 2001; Miller and Cohen in, Annual Review of Neuroscience, 24, 167-202, 2001). Based on this constructive nature, we hypothesized that visual perception may be better than is typically expected. In three experiments, we demonstrated the malleability of visual acuity using a conditioning procedure involving manipulations in bottom-up stimuli. Experimental groups read a book excerpt with one letter in decreased font size, while the control groups read the same book excerpt with all letters in the same font size. Experiment 1 (N?=?112) examined whether visual acuity could be enhanced for a specific letter. Experiment 2 (N?=?70) assessed whether visual acuity could be enhanced for a non-conditioned letter, while Experiment 3 (N?=?108) evaluated whether the visual conditioning effects would transfer to all non-conditioned letters. Visual acuity for experimental groups was significantly better than that in the control groups, speaking to the general malleability of our visual sense. 相似文献
807.
We investigated the use of space in the comprehension of the concept of quantity in text. Previous work has suggested that the right-left axis is useful in spatial representations of number and quantity, while linguistic evidence points toward use of the up-down axis. In Experiment 1, participants read sentences containing quantity information and pressed buttons in either (1) an up and a down position or (2) a left and a right position. In Experiment 2, the participants pressed buttons in either (1) up and down positions or (2) left and right positions, but heard the sentences rather than reading them. We found spatial compatibility effects for the up-down axis, but not for the right-left axis. Additionally, the spatial compatibility effect was observed whether or not the participants moved to make their responses. We discussed the results in the context of embodied approaches to the comprehension of quantity information. 相似文献
808.
Using two clinical samples of patients, the presented studies examined the construct validity of the recently revised Anxiety Sensitivity Index-3 (ASI-3). Confirmatory factor analyses established a clear three-factor structure that corresponds to the postulated subdivision of the construct into correlated somatic, social, and cognitive components. Participants with different primary clinical diagnoses differed from each other on the ASI-3 subscales in theoretically meaningful ways. Specifically, the ASI-3 successfully discriminated patients with anxiety disorders from patients with nonanxiety disorders. Moreover, patients with panic disorder or agoraphobia manifested more somatic concerns than patients with other anxiety disorders and patients with nonanxiety disorders. Finally, correlations of the ASI-3 scales with other measures of clinical symptoms and negative affect substantiated convergent and discriminant validity. Substantial positive correlations were found between the ASI-3 Somatic Concerns and body vigilance, between Social Concerns and fear of negative evaluation and socially inhibited behavior, and between Cognitive Concerns and depression symptoms, anxiety, fear of negative evaluation, and subjective complaints. Moreover, Social Concerns correlated negatively with dominant and intrusive behavior. Results are discussed with respect to the contribution of the ASI-3 to the assessment of anxiety-related disorders. 相似文献
809.
This study replicates and extends prior studies of the dimensionality, convergent, and external validity of African Self-Consciousness Scale scores with appropriate exploratory factor analysis methods and a large gender balanced sample (N = 348). Viable one- and two-factor solutions were cross-validated. Both first factors overlapped significantly and were labeled "Embracing African Heritage." The second subscale of the two-factor solution was labeled "Refusal to Deny African Heritage." Only the structural validity of the first factor of the two-factor solution was fully consistent with prior findings. Partial evidence of convergent validity was found for all factors, and only the second factor of the two-factor solution received external validity support. Implications for usage of the African Self-Consciousness Scale and recommendations for further investigation are discussed. 相似文献
810.
With increasing popularity, growth curve modeling is more and more often considered as the 1st choice for analyzing longitudinal data. Although the growth curve approach is often a good choice, other modeling strategies may more directly answer questions of interest. It is common to see researchers fit growth curve models without considering alterative modeling strategies. In this article we compare 3 approaches for analyzing longitudinal data: repeated measures analysis of variance, covariance pattern models, and growth curve models. As all are members of the general linear mixed model family, they represent somewhat different assumptions about the way individuals change. These assumptions result in different patterns of covariation among the residuals around the fixed effects. In this article, we first indicate the kinds of data that are appropriately modeled by each and use real data examples to demonstrate possible problems associated with the blanket selection of the growth curve model. We then present a simulation that indicates the utility of Akaike information criterion and Bayesian information criterion in the selection of a proper residual covariance structure. The results cast doubt on the popular practice of automatically using growth curve modeling for longitudinal data without comparing the fit of different models. Finally, we provide some practical advice for assessing mean changes in the presence of correlated data. 相似文献