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81.
Recently it has been claimed by Livingstone and Hubel that, of three anatomically and functionally distinct visual channels (the magnocellular, parvocellular interblob, and blob channels), only the magnocellular channel is involved in the processing of stereoscopic depth. Since the magnocellular system shows little overt colour opponency, the reported loss of the ability to resolve random-dot stereograms defined only by colour contrast seems consistent with this view. However, Julesz observed that reversed-contrast stereograms could be fused if correlated colour information was added. In the present study, 'noise' (non-corresponding) pixels were injected into random-dot stereograms in order to increase fusion time. All six subjects tested were able to achieve stereopsis in less than three minutes when there was only correspondence in colour and not in luminance, and three when luminance contrast was completely reversed. This ability depends on information about the direction of colour contrast, not just the presence of chromatic borders. When luminance and chromatic contrast are defined in terms of signal-to-noise ratios at the photoreceptor mosaic, chromatic information plays at least as important a role in stereopsis as does luminance information, suggesting that the magnocellular channel is not uniquely involved. 相似文献
82.
Fernandez S Malcarne VL Malacrne VL Wilfley DE McQuaid J 《Cultural diversity & ethnic minority psychology》2006,12(3):403-419
The factor structure of the Bulimia Test--Revised (BULIT-R) was investigated using confirmatory factor analysis (CFA) and exploratory factor analysis (EFA). The sample consisted of 2,671 female college students (African American, Asian American, Caucasian American, and Latino American). Reliability coefficients were excellent across groups. African Americans scored significantly lower on the BULIT-R than Caucasian Americans. Across groups, CFA and EFA results suggest a six-factor solution is most appropriate. Consistent across groups were factors representing bingeing, body image, purging, and extreme weight loss behaviors, while few differences were observed across groups. These findings suggest that the measure is reliable and valid for use with diverse ethnic groups. Future research should focus on culturally salient psychological correlates of disordered eating in diverse ethnic groups. 相似文献
83.
This study examined the relationship between the similarity and accuracy of team mental models and compared the extent to which each predicted team performance. The relationship between team ability composition and team mental models was also investigated. Eighty-three dyadic teams worked on a complex skill task in a 2-week training protocol. Results indicated that although similarity and accuracy of team mental models were significantly related, accuracy was a stronger predictor of team performance. In addition, team ability was more strongly related to the accuracy than to the similarity of team mental models and accuracy partially mediated the relationship between team ability and team performance, but similarity did not. 相似文献
84.
The present study aimed at investigating to what extent sensorimotor synchronization is related to (i) musical specialization, (ii) perceptual discrimination, and (iii) the movement’s trajectory. To this end, musicians with different musical expertise (drummers, professional pianists, amateur pianists, singers, and non-musicians) performed an auditory and visual synchronization and a cross-modal temporal discrimination task. During auditory synchronization drummers performed less variably than amateur pianists, singers and non-musicians. In the cross-modal discrimination task drummers showed superior discrimination abilities which were correlated with synchronization variability as well as with the trajectory. These data suggest that (i) the type of specialized musical instrument affects synchronization abilities and (ii) synchronization accuracy is related to perceptual discrimination abilities as well as to (iii) the movement’s trajectory. Since particularly synchronization variability was affected by musical expertise, the present data imply that the type of instrument improves accuracy of timekeeping mechanisms. 相似文献
85.
Mark S. Edwards Jennifer S. Burt Ottmar V. Lipp 《British journal of psychology (London, England : 1953)》2010,101(2):325-343
We investigated selective attention for masked and unmasked, threat, and positively valenced words, in high trait anxious (HTA) and low trait anxious (LTA) individuals using the emotional Stroop colour‐naming task. State anxiety was varied within participants through the threat of electric shock. To investigate whether the sequencing of the state anxiety manipulation affected colour‐naming latencies, the ordering of the shock threat and shock safe conditions was counterbalanced across participants. The results indicated that the ordering of the state anxiety manipulation moderated masked and unmasked threat bias effects. Specifically, relative to LTA individuals, HTA individuals showed a threat interference effect, but this effect was limited to those who performed under the threat of shock in the later stages of the experiment. Irrespective of exposure mode and state anxiety status, all individuals showed interference for threat in the early stages of the experiment, relative to a threat facilitation effect in the later stages of the experiment. For the unmasked trials alone, the data also revealed a significant threat interference effect for the HTA group relative to the LTA group in the shock threat condition, and this effect was evident irrespective of shock threat order. The results are discussed with respect to the automatic nature of emotional processing in anxiety. 相似文献
86.
Across four studies we demonstrate that people in a position to provide help tend to underestimate the role that embarrassment plays in decisions about whether or not to ask for help. As a result, potential helpers may overestimate the likelihood that people will ask for help (Studies 1 and 2). Further, helpers may be less inclined to allocate resources to underutilized support programs than help-seekers because they are less likely to attribute low levels of use to help-seekers’ concerns with embarrassment (Study 3). Finally, helpers may misjudge the most effective means of encouraging help-seeking behavior - emphasizing the practical benefits of asking for help, rather than attempting to assuage help-seekers’ feelings of discomfort (Study 4). 相似文献
87.
Helena Cassol Charlotte Martial Jitka Annen Géraldine Martens Vanessa Charland-Verville Steve Majerus 《Memory (Hove, England)》2013,21(8):1122-1129
ABSTRACTNear-death experiences (NDEs) are usually associated with positive affect, however, a small proportion are considered distressing. We aimed to look into the proportion of distressing NDEs in a sample of NDE narratives, categorise distressing narratives according to Greyson and Bush’s classification (inverse, void or hellish), and compare distressing and “classical” NDEs. Participants wrote down their experience, completed the Memory Characteristics Questionnaire (assessing the phenomenology of memories) and the Greyson scale (characterising content of NDEs). The proportion of suicidal attempts, content and intensity of distressing and classical NDEs were compared using frequentist and Bayesian statistics. Distressing NDEs represent 14% of our sample (n?=?123). We identified 8 inverse, 8 hellish and 1 void accounts. The proportion of suicide survivors is higher in distressing NDEs as compared to classical ones. Finally, memories of distressing NDEs appear as phenomenologically detailed as classical ones. Distressing NDEs deserve careful consideration to ensure their integration into experiencers’ identity. 相似文献
88.
Stephen D. Edwards Gerard F. Borsten Louis M. Nene Stanley T. Kunene 《The Journal of psychology》2013,147(5):433-438
This study examined the effect of urbanization on 102 South African fathers' perceptions of their paternal responsibilities. Fathers were categorized as rural, transitional, or urban on the basis of a standardized interval measure of urbanization. Perceptions of paternal responsibilities were rank-ordered into three basic anthropologically sequential categories: breadwinner, governor, and family. Results indicated that rural, transitional, and urban fathers all viewed breadwinner responsibilities as most important but that urbanization had a significant effect on fathers' perceptions of their responsibilities. 相似文献
89.
Sharan L. Schwartzberg Scott A. Trudeau Vanessa Vega 《Occupational Therapy in Mental Health》2013,29(2):134-148
In today's penurious health care climate, occupational therapists must scrutinize their practice and substantiate their interventions in order to remain viable service providers. This article proposes a method of occupational therapy outcomes assessment in mental health care that is rooted in client-centered functional outcomes. Since little consensus exists on which instruments are most effective, this article begins with an outline of broadly accepted principles for assessment of patient outcomes in mental health. Next, we describe a practical method for selecting outcomes measures in interdisciplinary settings. Finally, we offer pragmatic solutions to address barriers to outcome assessment. 相似文献
90.
Claire Edwards 《Topoi》2013,32(2):189-196
Disabled people frequently find themselves in situations where their quality of life and wellbeing is being measured or judged by others, whether in decisions about health care provision or assessments for social supports. Recent debates about wellbeing and how it might be assessed (through subjective and/or objective measures) have prompted a renewed focus on disabled people’s wellbeing because of its seemingly ‘anomalous’ nature; that is, whilst to external (objective) observers the wellbeing of disabled people appears poor, based on subjective assessments, people with disabilities report a good quality of life. In this paper, I examine an article by the philosopher Dan Moller in which he seeks to explain this ‘disability paradox’. Despite agreeing with his analysis that there is more to what people value than happiness, his explanation reflects some of the difficulties presented in philosophical accounts which seek to understand the lives of disabled people: this includes an analysis which fails to problematise definitions of wellbeing and who has the ‘voice’ to do the defining; which negates the multiple identities and subject positions that disabled people occupy; and which lacks recognition of the social contexts which mediate disabled people’s lives. I suggest that there is a need to incorporate disabled people’s voices into research which deepens our empirical knowledge about the relationship between impairment and wellbeing, including the social circumstances that shape disabled people’s agency. 相似文献