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51.
Richard?Guest Nick?DonnellyEmail author Michael?Fairhurst Jonathan?Potter 《Behavior research methods》2004,36(2):347-354
Figure copying is often used to detect visuospatial neglect (VSN) in brain-damaged patients. We describe algorithms that enable
the computation of parameters for describing figure-copying performance. The researcher can readily implement these algorithms
on a computer using image analysis software, and they provide information on goodness-of-fit, relative to a standard model,
as well as on dynamic aspects of subjects’ performance in completing figure copies. To demonstrate the clinical utility of
these algorithms, preliminary results from a group of right-hemisphere brain-damaged patients, some of whom have VSN, are
compared with those for age-matched controls. 相似文献
52.
The military has a well-defined population with suicide prevention programs that have been recognized as possible models for civilian suicide prevention efforts. Monitoring prevention programs requires accurate reporting. In civilian settings, several studies have confirmed problems in the reporting and classification of suicides. This analysis evaluated whether suicides were underreported or misclassified under accident or undetermined manner of death in the military system. We reviewed all 1998 and 1999 military deaths using official death reports and compared these data with additional sources, most importantly the DoD Medical Mortality Registry. We assessed for evidence of expressed suicidal intent and past psychiatric history among deaths classified as undetermined and accidents due to gunshot, overdose, drowning, falls, or asphyxia. Using sources other than official records, we found 17% more suicides than were reported, and an additional 4% of deaths that were suspicious for suicide. This study suggests that reporting and classification errors may account for 21% additional suicides in the military. These findings are comparable to rates seen in civilian studies and add to the literature regarding the problems inherent in using administrative death classification data for medical surveillance purposes. 相似文献
53.
McMorris T Tallon M Williams C Sproule J Draper S Swain J Potter J Clayton N 《Perceptual and motor skills》2003,97(2):590-604
The primary purpose was to examine the effect of incremental exercise on a noncompatible response time task. Participants (N=9) undertook a 4-choice noncompatible response time task under 3 conditions, following rest and during exercise at 70% and 100% of their maximum power output. Reaction and movement times were the dependent variables. Maximum power output had been previously established on an incremental test to exhaustion. A repeated-measures multivariate analysis of variance yielded a significant effect of exercise intensity on the task, observation of the separate univariate repeated-measures analyses of variance showed that only movement time was significantly affected. Post hoc Tukey tests indicated movement time during maximal intensity exercise was significantly faster than in the other two conditions. The secondary purpose of the study was to assess whether increases in plasma concentrations of adrenaline and nor-adrenaline during exercise and power output would act as predictor variables of reaction and movement times during exercise. Catecholamine concentrations were based on venous blood samples taken during the maximum power output test. None of the variables were significant predictors of reaction time. Only power output was a significant predictor of movement time (R2 = .24). There was little support for the notion that peripheral concentrations of catecholamines directly induce a central nervous system response. 相似文献
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In two experiments, we examined the representation, treatment, and attention devoted to the members of reference (i.e., club members) and nonreference (i.e., not club members) categories. Consistent with prior work on category interrelatedness (e.g., Goldstone, 1996; Goldstone, Steyvers, and Rogosky, 2003), the findings reveal the existence of asymmetric representations for reference and nonreference categories, which, however, decreased as expertise and familiarity with the categories increased (Experiments 1 and 2). Participants also more readily judged two reference exemplars as being the same than they did two nonreference exemplars (Experiment 1) and were better at detecting reference than nonreference exemplars in a set of novel, category-unspecified exemplars (Experiment 2). These findings provide evidence for the existence of a feature asymmetry in the representation and treatment of exemplars from reference and nonreference categories. Membership in a reference category acts as a salient feature, thereby increasing the perceived similarity and detection of faces that belong in the reference, in comparison with the nonreference, category. 相似文献
56.
The Internet as a popular media is not even one decade old. From its early days of wide access, concern with the dangers posed
to children and teens has been a staple of news media and moral entrepreneurs. Concern with sexual predators, “cyberporn”
(or “pornographic” material housed on “nodes” of the World Wide Web) became media-induced moral panics of the mid- and late-1990s.
This paper examined the Internet and children in the context of the United States and Australia. Studies of children’s access
to the Internet and it’s effects were examined. Particular attention was paid to the aspects of Internet danger as a form
of “urban legend” aimed at middle-class parents who are able to provide access to the technology required to access the “dangers”
of the Web. The intersection of urban mythology, technological change, and morals campaigns of the 1990s was explored. The
role played by concern with the Internet in the on-going history of moral movements and parental responsibility was discussed. 相似文献
57.
Findings on both attractiveness and memory for faces suggest that people should perceive more similarity among attractive
than among unattractive faces. A multidimensional scaling approach was used to test this hypothesis in two studies. In Study
1, we derived a psychological face space from similarity ratings of attractive and unattractive Caucasian female faces. In
Study 2, we derived a face space for attractive and unattractive male faces of Caucasians and non-Caucasians. Both studies
confirm that attractive faces are indeed more tightly clustered than unattractive faces in people’s psychological face spaces.
These studies provide direct and original support for theoretical assumptions previously made in the face space and face memory
literatures. 相似文献
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