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141.
H.Branch Coslett 《Brain and cognition》1998,37(3):527-544
Subjects with left neglect often fail to use and, in some instances, recognize the left side of the body. We performed a series of investigations to determine if this deficit is, at least in part, attributable to an impairment in the “body schema,” an internal three-dimensional, dynamic representation of the spatial and biomechanical properties of one's body. First, subjects were shown a series of pictures of a single hand and asked to determine if the stimulus was a right or left hand. Subjects with neglect but not other subjects with brain lesions identified pictures of left (contralesional) hands significantly less reliably than pictures of right hands. On the basis of evidence demonstrating that the identification of pictured hands involves the matching of the stimuli to an on-line mental representation of one's body, these data suggest that neglect may be associated with a disruption of, or failure to attend to, the body schema. Data from subsequent investigations contrasting patients with left neglect and Gerstmann's syndrome argue for a distinction between a body schema and a “body image,” or conceptual representation of the body which articulates with language. 相似文献
142.
Kleinman JT Gottesman RF Davis C Newhart M Heidler-Gary J Hillis AE 《Brain and cognition》2008,68(1):49-52
Hemispatial neglect is a common and disabling consequence of stroke. Previous reports examining the relationship between gender and the incidence of unilateral spatial neglect (USN) have included either a large numbers of patients with few neglect tests or small numbers of patients with multiple tests. To determine if USN was more common and/or severe in men or women, we examined a large group of patients (312 right-handed) within 24 hours of acute right hemisphere ischemic stroke. Multiple spatial neglect tasks were used to increase the sensitivity of neglect detection. No differences based upon gender were observed for the prevalence, severity, or a combined task measure of USN. 相似文献
143.
We study the process by which decision makers (DMs) aggregate probabilistic opinions from multiple, correlated sources with a special emphasis on the determinants of the DM's confidence, which is a predictor of the DM's willingness to accept the implications of the aggregation process. Our model assumes that (a) DM combines the advisors' opinions by weighting them according to the amount of information underlying them, and (b) the DM's confidence increases as a function of a variety of factors that reduce the variance of the aggregate. We report results of three studies that manipulate the predictive validity of the cues and their inter‐correlations. Most of the models' predictions are supported but, contrary to the model's prediction, the DMs' confidence is not sensitive to the inter‐cue correlation. The best predictors of the DMs' confidence are the perceived predictability of the event, the level of agreement among the advisors, and the advisors' self‐reports of confidence. This pattern of results is explained by the ‘system neglect’ hypothesis. Copyright © 2006 John Wiley & Sons, Ltd. 相似文献
144.
Smith AD Gilchrist ID Butler SH Muir K Bone I Reeves I Harvey M 《Brain and cognition》2007,64(2):150-157
Spatially lateralised deficits that typically define the hemispatial neglect syndrome have been shown to co-occur with other non-lateralised deficits of attention, memory, and drawing. However even a simple graphic task involves multiple planning components, including the specification of drawing start position and drawing direction. In order to investigate the influence of these factors in neglect we presented patients with a circle-copying task, and specified the drawing start point. The ability to draw from the instructed location was strongly related to tests that measure constructional abilities, but not related to start point laterality. In contrast, the direction in which patients drew the circle was affected by start point laterality: patients with neglect were less likely to draw in a typical direction when the cue was on the affected side of space and this was strongly related to severity of the neglect. Patients with neglect consistently produced circles that were smaller than the model; however, the scaling was not affected by the laterality of the start point, nor was the proportion of drawings correctly started at the cue. These findings demonstrate the complex relationship between neglect and even the simplest test for the syndrome. 相似文献
145.
Crossover by Line Length and Spatial Location 总被引:2,自引:0,他引:2
It is well known that line length has a systematic influence on line bisection error in neglect. Most patients with neglect misbisect long lines on the same side of true center as their brain lesion but then cross over on short lines, misbisecting them on the opposite side (i.e., crossover by line length). What is less recognized is that the spatial location of lines relative to the viewer can similarly induce a crossover effect when one considers line bisection error scores that have been averaged across individual line lengths. Patients with right hemisphere injury and neglect classically make averaged line bisection errors that fall right of true center on lines located either at midline or to the left of the viewer; however, we observed that the averaged line bisection error can fall left of true center when lines are located to the right of the viewer (i.e., crossover by spatial location). We hypothesized that crossover by both line length and spatial location stem from systematic errors in magnitude estimation, i.e., perceived line length. We tested predictions based on this hypothesis by examining how the crossover effect by line length is altered by the spatial location of lines along a horizontal axis relative to the viewer. Participants included patients with unilateral lesions of the right and left cerebral hemispheres and age-appropriate normal subjects. All groups demonstrated a crossover effect by line length at the midline location but the effect was altered by placing lines to the right and left of the viewer. In particular, patients with right hemisphere injury and neglect crossed-over across a broader range of line lengths when the lines were located to the right of the viewer rather than at either midline or left of the viewer. It is proposed that mental representations of stimulus magnitude are altered in neglect, in addition to mental representations of space, and that traditional accounts of neglect can be enhanced by including the psychophysical concept of magnitude estimation. 相似文献
146.
147.
Anne Hurley 《Journal of Child Psychotherapy》2017,43(2):192-207
This article considers narcissistic states in babies and young children with some reference to the myth of Narcissus in Ovid’s Metamorphosis. The object-seeking character of babies from the beginning of life is elaborated in connection with selected research from mother–baby interaction. This forms the backdrop to a discussion of withdrawal into illusions of self-sufficiency and denial of dependence in adverse circumstances. Two clinical cases are discussed in some depth. One boy whose superiority, self-reliance and pseudo maturity is prompted by anxieties around separation as he approaches starting school is considered within the parameters of ordinary transient narcissism. The lengthy psychotherapy of another child, who developed entrenched narcissistic defences as a response to traumatic, abusive and neglectful experiences in early life, and who needed considerable help, is described in greater detail. Some links are made with difficulties associated with the emergence from narcissistic functioning and encountering the pain of separation and loss. 相似文献
148.
Everybody Will Win,and All Must Be Hired: Comparing Additivity Neglect with the Nonselective Superiority Bias 下载免费PDF全文
Two streams of research looking at referent‐dependent judgments from slightly different angles are subadditivity research and research on the nonselective superiority bias. Both biases violate basic formal constraints: the probabilities of a set of exclusive events cannot add up to more than 100%, and a set of attractive candidates cannot all be rated as superior to the group mean. We examine in three experiments how these two biases are related, by asking the same participants to perform both kinds of tasks on the same material. Both biases appear to be widespread, even for sets where all alternatives are presented together, but they differ in the way they are affected by response format and experimental setup. Thus, presenting participants with an unbiased set of ratings will reduce but not normalize their probability estimates of the same alternatives; while presenting them with an unbiased (additive) set of probabilities will make most alternatives appear inferior to the group mean, inverting the superiority bias. Self‐reports reveal that additivity neglect and the nonselective superiority bias can be based on two main response‐strategies: (i) considering each alternative independently or (ii) comparing alternatives, while neglecting their complementarity. In both cases, assessments will be the outcome of a compromise between the perceived “absolute” merits of each alternative, its standing relative to referents, and properties of the response scale. Copyright © 2015 John Wiley & Sons, Ltd. 相似文献
149.
在一般攻击模型(GAM)和个体-环境交互作用模型的视角下,采用儿童心理虐待与忽视量表、青少年道德推脱问卷和攻击行为问卷对696名青少年进行调查,以探讨心理虐待与忽视对青少年攻击行为的影响以及道德推脱在其中的作用机制。结果发现:(1)心理虐待与忽视与青少年攻击行为和道德推脱均呈显著正相关,道德推脱与青少年攻击行为也呈显著正相关;(2)道德推脱在心理虐待与忽视和青少年攻击行为之间起着部分中介作用,道德推脱的中介作用不存在性别差异,但存在显著的年龄差异,在初中组中,道德推脱在心理虐待与忽视和青少年攻击行为间的中介作用为部分中介,而在高中组中为完全中介;(3)道德推脱在心理虐待与忽视和青少年攻击行为之间的调节作用不显著,道德推脱的调节作用不存在年龄差异,但存在显著的性别差异,在男生组中,道德推脱在心理虐待与忽视和青少年攻击行为间的调节作用不显著,而在女生组中显著。 相似文献
150.
Weddell RA 《Brain and cognition》2004,55(3):497-506
The Sprague effect is well-established-small tectal lesions restore visual orientation in the hemianopic field of animals with extensive unilateral geniculo-striate lesions. Studies of human midbrain visual functions are rare. This man with a midbrain tumour developed left-neglect through subsequent right frontal damage. Bilateral orientation returned after clear evidence of damage to the superior colliculus contralateral to the cortical lesion (showing the Sprague effect extends to man). Sustained right-neglect developed after probable additional damage to right superior colliculus. The regulation of spatial attention by tecto-pulvinar circuits is discussed, and it is argued that the reduced right tecto-pulvinar activity (consequent to the additional right collicular damage) was offset by over-compensatory increase in thalamic reticular nucleus (TRN) suppression of left pulvinar activity. 相似文献