Time course and robustness of ERP object and face differences

Conflicting results have been reported about the earliest “true” ERP differences related to face processing, with the bulk of the literature focusing on the signal in the first 200 ms after stimulus onset. Part of the discrepancy might be explained by uncontrolled low-level differences between images used to assess the timing of face processing. In the present experiment, we used a set of faces, houses, and noise textures with identical amplitude spectra to equate energy in each spatial frequency band. The timing of face processing was evaluated using face–house and face–noise contrasts, as well as upright-inverted stimulus contrasts. ERP differences were evaluated systematically at all electrodes, across subjects, and in each subject individually, using trimmed means and bootstrap tests. Different strategies were employed to assess the robustness of ERP differential activities in individual subjects and group comparisons. We report results showing that the most conspicuous and reliable effects were systematically observed in the N170 latency range, starting at about 130–150 ms after stimulus onset

Mapping HIV-related figures of risk in Europe’s blood donation regime

Grasping blood donation as contested grounds for enacting notions of belonging, responsibility and citizenship, this article analyses the role of donor deferral policies in the emergence of a European blood donation regime. We demonstrate how shifts in the moral economy of blood donation that followed from the outbreak of the human immunodeficiency virus (HIV) epidemic led to the prioritisation of donor deferral policies in efforts to enhance blood safety across Europe. We propose the notion "figures of risk" - condensed figurations of those understood to pose risks of HIV infection to themselves and to others - to describe the categories of persons implicated in changing European donor restriction policies. We explore how the Council of Europe’s annually revised Guide to the preparation, use and quality assurance of blood components, first published in 1992, came to legitimise and sustain increasingly contested deferral practices, which have produced shifting groups of persons as European ‘figures of risk’. Qualitative analyses of the Guide’s 19 editions reveal 3 dimensions through which these figures have become increasingly stabilised over time: in terms of their ontology, temporality and risk-related exceptionality. We conclude by asking how collectivising figurations of donors, framed through literature on ‘profiling’, shape notions of European citizenship

The temporal regimes of HIV/AIDS activism in Europe : chrono-citizenship, biomedicine and its others

HIV/AIDS is known to have fundamentally transformed fields of biomedical research, the governance of health, and state-citizen relations. Based on research that was developed to analyze these transformations within HIV/AIDS activism at the European-level, we offer the term chronocitizenship to describe the influence of time in constructs of citizenship. We argue that the temporal regime of biomedicine, or modes of governance that depend on biomedical understandings of time, have come to dominate HIV/AIDS narratives, policies and programs. Building on oral histories and three years of fieldwork in spaces of European-level networks and health-governing bodies, we suggest that citizenship in the field of HIV/AIDS has been defined through multiple, intersecting and, at times, antagonistic temporal regimes. To illustrate this, we expose the regime of loss, through which mourning, often denied space in the present, bears potential for new forms of subjectivity and community; the regime of sustainability, which centers the planning and surveillance of budgets over service provision in a climate unfriendly to human rights; and the regime of chronic crisis, in which persistence becomes a form of political agency against ongoing exclusion and disappointment. As we show, unearthing varied temporalities helps to denaturalize biomedical understandings of time, and invites a rethinking of the foundations needed to reach the ‘end of AIDS’ sought by civil society, UNAIDS and other health-governing bodies

Effects of aging on identifying emotions conveyed by point-light walkers

M.G. was supported by EC FP7 HBP (grant 604102), PITN-GA-011-290011 (ABC) FP7-ICT-2013-10/ 611909 (KOROIBOT), and by GI 305/4-1 and KA 1258/15-1, and BMBF, FKZ: 01GQ1002A. K.S.P. was supported by a BBSRC New Investigator Grant. A.B.S. and P.J.B. were supported by an operating grant (528206) from the Canadian Institutes for Health Research. The authors also thank Donna Waxman for her valuable help in data collection for all experiments described here.Peer reviewedPostprin

CUQI: cardiac ultrasound video quality index

Medical images and videos are now increasingly part of modern telecommunication applications, including telemedicinal applications, favored by advancements in video compression and communication technologies. Medical video quality evaluation is essential for modern applications since compression and transmission processes often compromise the video quality. Several state-of-the-art video quality metrics used for quality evaluation assess the perceptual quality of the video. For a medical video, assessing quality in terms of "diagnostic" value rather than "perceptual" quality is more important. We present a diagnostic-quality-oriented video quality metric for quality evaluation of cardiac ultrasound videos. Cardiac ultrasound videos are characterized by rapid repetitive cardiac motions and distinct structural information characteristics that are explored by the proposed metric. Cardiac ultrasound video quality index, the proposed metric, is a full reference metric and uses the motion and edge information of the cardiac ultrasound video to evaluate the video quality. The metric was evaluated for its performance in approximating the quality of cardiac ultrasound videos by testing its correlation with the subjective scores of medical experts. The results of our tests showed that the metric has high correlation with medical expert opinions and in several cases outperforms the state-of-the-art video quality metrics considered in our tests

Importance of the Physical Environment for Older People

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/111095/1/j.1532-5415.1985.tb05445.x.pd

Effects of aging on biological motion discrimination

Peer reviewedPreprin

Effects of aging on face identification and holistic face processing

AbstractSeveral studies have shown that face identification accuracy is lower in older than younger adults. This effect of aging might be due to age differences in holistic processing, which is thought to be an important component of human face processing. Currently, however, there is conflicting evidence as to whether holistic face processing is impaired in older adults. The current study therefore re-examined this issue by measuring response accuracy in a 1-of-4 face identification task and the composite face effect (CFE), a common index of holistic processing, in older adults. Consistent with previous reports, we found that face identification accuracy was lower in older adults than in younger adults tested in the same task. We also found a significant CFE in older adults that was similar in magnitude to the CFE measured in younger subjects with the same task. Finally, we found that there was a significant positive correlation between the CFE and face identification accuracy. This last result differs from the results obtained in a previous study that used the same tasks and which found no evidence of an association between the CFE and face identification accuracy in younger adults. Furthermore, the age difference was found with subtraction-, regression-, and ratio-based estimates of the CFE. The current findings are consistent with previous claims that older adults rely more heavily on holistic processing to identify objects in conditions of limited processing resources