全文获取类型
收费全文 | 3558篇 |
免费 | 121篇 |
国内免费 | 2篇 |
专业分类
3681篇 |
出版年
2019年 | 45篇 |
2018年 | 54篇 |
2017年 | 58篇 |
2016年 | 73篇 |
2015年 | 48篇 |
2014年 | 59篇 |
2013年 | 375篇 |
2012年 | 99篇 |
2011年 | 115篇 |
2010年 | 77篇 |
2009年 | 76篇 |
2008年 | 130篇 |
2007年 | 104篇 |
2006年 | 107篇 |
2005年 | 108篇 |
2004年 | 90篇 |
2003年 | 109篇 |
2002年 | 118篇 |
2001年 | 58篇 |
2000年 | 45篇 |
1999年 | 56篇 |
1998年 | 40篇 |
1997年 | 45篇 |
1996年 | 44篇 |
1995年 | 37篇 |
1994年 | 46篇 |
1993年 | 56篇 |
1992年 | 40篇 |
1991年 | 56篇 |
1990年 | 46篇 |
1989年 | 36篇 |
1988年 | 44篇 |
1987年 | 46篇 |
1986年 | 40篇 |
1985年 | 41篇 |
1984年 | 68篇 |
1983年 | 46篇 |
1982年 | 58篇 |
1981年 | 59篇 |
1980年 | 39篇 |
1979年 | 48篇 |
1978年 | 44篇 |
1977年 | 58篇 |
1976年 | 52篇 |
1975年 | 51篇 |
1974年 | 56篇 |
1973年 | 53篇 |
1972年 | 30篇 |
1968年 | 30篇 |
1966年 | 39篇 |
排序方式: 共有3681条查询结果,搜索用时 15 毫秒
931.
Krystal Warmoth Mark Tarrant Charles Abraham Iain A. Lang 《Psychology, health & medicine》2018,23(4):465-474
Older adults’ negative beliefs about ageing are related to their health and functioning, but little is known about how perceptions of ageing (POA) relate to frailty status. This study aimed to explore the relationship between POA and frailty. Secondary analysis of data used were from the English Longitudinal Study of Ageing Waves 2 and 5. A POA score was based on participants’ responses to 12 statements using a five-point Likert scale at baseline, and a Frailty Index (FI) score was calculated for each participant for both waves. Multiple linear regression models were conducted to assess the relationship between POA and frailty cross-sectionally and longitudinally in models controlled for age, gender, depression symptoms, and socioeconomic status. Older adults with more negative POA had greater frailty (β = .12, p < .001). Negative POA predicted greater frailty 6 years later (β = .03, p < .05). Future work regarding the mechanisms of this relationship is needed to identify ways of intervening to improve health. 相似文献
932.
We investigated the role of self-motivated behaviour in promoting intergroup member contact for intergroup harmony. A multi-ethnic group of 68 freshmen students attending a Nigerian state university were participants (female = 43.8%; Mean age = 22.15 years, SD = 2.35 years; Igbo = 45.6%, Hausa/Fulani = 20.4%, Yoruba = 24.5%, and others = 9.5%). By religious affiliation, the students comprised Christians (62%) and Muslims (38%). The students took part in an intergroup contact learning assignment designed for them to interact with others outside their class cohort and from a different ethnic group to themselves. They completed measures of self-motivated behaviours defined by self-efficacy, self-interest, learning predisposition, as well as intergoup harmony. Tests of mediation revealed significant positive indirect effects of intergroup member contact on intergroup harmony through self-efficacy, self-interest, and learning behaviour. Self-motivated behaviour fully mediated the relationship between intergroup contact and intergroup harmony among students in Nigerian multi-ethnic settings. Self-motivated behaviour may facilitate peace-building and intergroup harmony, for management of intergroup relations, among Nigerian major ethnic groups premised on intergroup contact. 相似文献
933.
Dwight W. Irvin Stephen A. Crutchfield Charles R. Greenwood William D. Kearns Jay Buzhardt 《Behavior research methods》2018,50(3):890-901
Children’s movement is an important issue in child development and outcome in early childhood research, intervention, and practice. Digital sensor technologies offer improvements in naturalistic movement measurement and analysis. We conducted validity and feasibility testing of a real-time, indoor mapping and location system (Ubisense, Inc.) within a preschool classroom. Real-time indoor mapping has several implications with respect to efficiently and conveniently: (a) determining the activity areas where children are spending the most and least time per day (e.g., music); and (b) mapping a focal child’s atypical real-time movements (e.g., lapping behavior). We calibrated the accuracy of Ubisense point-by-point location estimates (i.e., X and Y coordinates) against laser rangefinder measurements using several stationary points and atypical movement patterns as reference standards. Our results indicate that activity areas occupied and atypical movement patterns could be plotted with an accuracy of 30.48 cm (1 ft) using a Ubisense transponder tag attached to the participating child’s shirt. The accuracy parallels findings of other researchers employing Ubisense to study atypical movement patterns in individuals at risk for dementia in an assisted living facility. The feasibility of Ubisense was tested in an approximately 90-min assessment of two children, one typically developing and one with Down syndrome, during natural classroom activities, and the results proved positive. Implications for employing Ubisense in early childhood classrooms as a data-based decision-making tool to support children’s development and its potential integration with other wearable sensor technologies are discussed. 相似文献
934.
A resurgence of interest in inner speech as a core feature of human experience has not yet coincided with methodological progress in the empirical study of the phenomenon. The present article reports the development and psychometric validation of a novel instrument, the Varieties of Inner Speech Questionnaire (VISQ), designed to assess the phenomenological properties of inner speech along dimensions of dialogicality, condensed/expanded quality, evaluative/motivational nature, and the extent to which inner speech incorporates other people’s voices. In response to findings that some forms of psychopathology may relate to inner speech, anxiety, depression, and proneness to auditory and visual hallucinations were also assessed. Anxiety, but not depression, was found to be uniquely positively related to both evaluative/motivational inner speech and the presence of other voices in inner speech. Only dialogic inner speech predicted auditory hallucination-proneness, with no inner speech variables predicting levels of visual hallucinations/disturbances. Directions for future research are discussed. 相似文献
935.
In the present review, we focus on how commonalities in the ontogenetic development of the auditory and tactile sensory systems may inform the interplay between these signals in the temporal domain. In particular, we describe the results of behavioral studies that have investigated temporal resolution (in temporal order, synchrony/asynchrony, and simultaneity judgment tasks), as well as temporal numerosity perception, and similarities in the perception of frequency across touch and hearing. The evidence reviewed here highlights features of audiotactile temporal perception that are distinctive from those seen for other pairings of sensory modalities. For instance, audiotactile interactions are characterized in certain tasks (e.g., temporal numerosity judgments) by a more balanced reciprocal influence than are other modality pairings. Moreover, relative spatial position plays a different role in the temporal order and temporal recalibration processes for audiotactile stimulus pairings than for other modality pairings. The effect exerted by both the spatial arrangement of stimuli and attention on temporal order judgments is described. Moreover, a number of audiotactile interactions occurring during sensory-motor synchronization are highlighted. We also look at the audiotactile perception of rhythm and how it may be affected by musical training. The differences emerging from this body of research highlight the need for more extensive investigation into audiotactile temporal interactions. We conclude with a brief overview of some of the key issues deserving of further research in this area. 相似文献
936.
Christopher A. D. Charles 《Sexuality & culture》2011,15(4):375-390
This article focuses on the sexual attraction motive for skin bleaching in Jamaica. Some captive Africans on plantations in
Jamaica altered their complexion. These Africans modeled the British in the colony who bleached their skin to protect the
“superior,” “sexy,” and ideal white skin from the “impurities” of interracial sex and the tropical climate. The beauty and
sexual attraction accorded to light skin was also evident in skin bleaching newspaper ads in the 1950s. The ads told women
that acquiring light complexion through skin bleaching would make them sexually attractive to men. The persistence of colorism
and its most blatant expression—skin bleaching—is also evident in contemporary Jamaica as expressed in some dancehall songs
which praise skin bleachers, and the explanatory narratives of skin bleachers that bleaching makes them pretty and sexually
attractive to potential spouses. Similar themes are reflected in the criticism that the browning Dancehall Queen Carlene was
deemed sexually attractive and choreographically talented only because of her brown physicality. Some spouses request that
their partner acquire the bleached physicality because they find it sexually attractive similar to many male clients in “massage
parlors” who only request female sex workers who bleach their skin. 相似文献
937.
Charles J. Abaté 《Science and engineering ethics》2011,17(3):583-596
Should engineering ethics be taught? Despite the obvious truism that we all want our students to be moral engineers who practice virtuous professional behavior, I argue, in this article that the question itself obscures several ambiguities that prompt preliminary resolution. Upon clarification of these ambiguities, and an attempt to delineate key issues that make the question a philosophically interesting one, I conclude that engineering ethics not only should not, but cannot, be taught if we understand “teaching engineering ethics” to mean training engineers to be moral individuals (as some advocates seem to have proposed). However, I also conclude that there is a justification to teaching engineering ethics, insofar as we are able to clearly identify the most desirable and efficacious pedagogical approach to the subject area, which I propose to be a case study-based format that utilizes the principle of human cognitive pattern recognition. 相似文献
938.
Spence C 《Attention, perception & psychophysics》2011,73(4):971-995
In many everyday situations, our senses are bombarded by many different unisensory signals at any given time. To gain the most veridical, and least variable, estimate of environmental stimuli/properties, we need to combine the individual noisy unisensory perceptual estimates that refer to the same object, while keeping those estimates belonging to different objects or events separate. How, though, does the brain “know” which stimuli to combine? Traditionally, researchers interested in the crossmodal binding problem have focused on the roles that spatial and temporal factors play in modulating multisensory integration. However, crossmodal correspondences between various unisensory features (such as between auditory pitch and visual size) may provide yet another important means of constraining the crossmodal binding problem. A large body of research now shows that people exhibit consistent crossmodal correspondences between many stimulus features in different sensory modalities. For example, people consistently match high-pitched sounds with small, bright objects that are located high up in space. The literature reviewed here supports the view that crossmodal correspondences need to be considered alongside semantic and spatiotemporal congruency, among the key constraints that help our brains solve the crossmodal binding problem. 相似文献
939.
Abstract Three experiments explored concreteness effects in memory for words following imagery-related orienting tasks. Predictions from dual coding and relational-distinctive explanations of concreteness and imagery effects were contrasted. Of particular interest were differences in the magnitudes of concreteness effects in an item-specific imagery task (timed image generation) and a relational imagery task (rating of relative imageability). The effects of restricted-range (high and medium-imagery) versus full-range (high, medium and low-imagery) materials were also considered as a means to evaluate the effects of relative item distinctiveness on concreteness effects. The results demonstrated the importance of relational information in the production of concreteness effects and indicated that imagery alone is an insufficient explanation of concreteness effects. At the same time, they revealed the need for a more comprehensive theoretical account of the role of mental imagery in memory, as neither model under consideration could account for all of the present findings. 相似文献
940.
Viviane Valdes Anne E. Berens Charles A. Nelson III 《International journal of psychology》2021,56(5):729-738
To current study aimed to estimate the point prevalence and identify correlates of postpartum depression (PPD) in a sample of mothers in Dhaka. A total of 235 participants from low- and middle-SES neighbourhoods in Dhaka completed the Edinburgh Postnatal Depression Scale (EPDS) and other assessments of socioeconomic and psychological factors at 24 weeks postpartum. Regression models were fit to explore potential correlates of PPD. The estimated prevalence of high PPD risk in the current sample is 24.3%. In multivariable linear regression models, recent life events, perceived stress and household resources (e.g., access to cooking gas, telephone, furniture, electricity, television, etc.) were significantly associated with PPD. The association of social support with PPD when controlling for other variables was sensitive to the choice of social support measure, highlighting an important methodological issue. The point prevalence of PPD among poor, urban mothers in Bangladesh ranges from 12.3 to 28.5%, with psychological risk factors and household resources as strong correlates. 相似文献