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171.
Abstract— In a hierarchical stage account of vision, figure-ground assignment is thought to be completed before the operation of focal spatial attention. Results of previous studies have supported this account by showing that unpredictive, exogenous spatial precues do not influence figure-ground assignment, although voluntary attention can influence figure-ground assignment. However, in these studies, attention was not summoned directly to a region in a figure-ground display. In three experiments, we addressed the relationship between figure-ground assignment and visuospatial attention. In Experiment 1, we replicated the finding that exogenous precues do not influence figure-ground assignment when they direct attention outside of a figure-ground stimulus. In Experiment 2, we demonstrated that exogenous attention can influence figure-ground assignment if it is directed to one of the regions in a figure-ground stimulus. In Experiment 3, we demonstrated that exogenous attention can influence figure-ground assignment in displays that contain a Gestalt figure-ground cue; this result suggests that figure-ground processes are not entirely completed prior to the operation of focal spatial attention. Exogenous spatial attention acts as a cue for figure-ground assignment and can affect the outcome of figure-ground processes. 相似文献
172.
Objects can control the focus of attention, allowing features on the same object to be selected more easily than features on different objects. In the present experiments, we investigated the perceptual processes that contribute to such object-based attentional effects. Previous research has demonstrated that object-based effects occur for single-region objects but not for multiple-region objects under some conditions (Experiment 1, Watson & Kramer, 1999). Such results are surprising, because most objects in natural scenes are composed of multiple regions. Previous findings could therefore limit the usefulness of an object-based selection mechanism. We explored the generality of these single-region selection results by manipulating the extent to which different (i.e., multiple) regions of a single object perceptually grouped together. Object-based attentional effects were attenuated when multiple regions did not group into a single perceptual object (Experiment 1). However, when multiple regions grouped together based on (1) edge continuation (Experiments 2 and 3) or (2) part and occlusion cues (Experiment 4), we observed object-based effects. Our results suggest that object-based attention is a robust process that can select multiple-region objects, provided the regions of such objects cohere on the basis of perceptual grouping cues. 相似文献
173.
Janine Stevenson Joan Haliburn Shaun Halovic Anthony Korner Loyola McLean 《Psychoanalytic Psychotherapy》2013,27(4):351-367
Background: The key features of short-term dynamic interpersonal psychotherapy (STDIP) are outlined along with the background of its development. Preliminary data demonstrating functional improvement in a small case series of patients is presented.Methods: Nineteen patients were evaluated at commencement and end of therapy in a pilot study. Instruments used were the Childhood Trauma Questionnaire (CTQ); Beck Depression Inventory (BDI); Brief Symptom Inventory (BSI); COPE (Coping Style Questionnaire); Relationship Styles Questionnaire (RSQ) and Social Adjustment Scale-Self Report (SAS-SR).Results: This cohort had significantly elevated scores on the CTQ. They demonstrated substantial improvement on measures including the BDI, and several subscales of BSI, COPE, RSQ and SAS-SR.Conclusions: The small numbers and naturalistic design preclude firm conclusions however the results suggest that STDIP can be used to successfully treat patients, notwithstanding a history of childhood trauma. 相似文献
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Edouard Machery Ron Mallon Shaun Nichols Stephen P. Stich 《Philosophy and phenomenological research》2013,86(3):618-635
We have recently presented evidence for cross‐cultural variation in semantic intuitions and explored the implications of such variation for philosophical arguments that appeal to some theory of reference as a premise. Devitt (2011) and Ichikawa and colleagues (forthcoming) offer critical discussions of the experiment and the conclusions that can be drawn from it. In this response, we reiterate and clarify what we are really arguing for, and we show that most of Devitt’s and Ichikawa and colleagues’ criticisms fail to address our concerns. 相似文献
176.
In this study, we examine the role of trust perceptions on psychological well-being and salivary cortisol levels of adolescents who were exposed to pervasive, noninterpersonal trauma, displacement, and relocation caused by Hurricane Katrina. Compared to demographically matched controls, affected adolescents reported higher perceptions of other people's trustworthiness, decreased externalizing behaviors, increased internalizing behaviors, greater desire for consolation from others, and lower cortisol activity. Follow-up analyses suggested that the relation between hurricane exposure and lower self-esteem might be mediated partly by increased trustworthiness perceptions. These results suggest that adolescents might respond to different types of stressors with varying patterns of distress and the manner in which the stressors alter trust processing might predict the development of internalizing or externalizing behaviors. 相似文献
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Visual attention can be configured for specific stimulus features (feature search mode) or it can be non-specifically set for salient pop-outs (singleton detection mode). Additionally, monetary rewards have been shown to bias attention toward specific features, but it is unknown whether secondary reinforcers (images of US$) can shape global attention via search modes. In a between-group study, we trained participants to value one search mode over the other. In a testing phase, a salient distractor captured the attention of the value-singleton group; however, the value feature group was completely unaffected. This suggests that rewards automatically bias global attention mechanisms and potentially mediate the handoff between stimulus-driven and goal-directed attentional control. 相似文献
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