The conflict adaptation (CA) effect refers to the reduction in the interference effect observed in conflict tasks that follow incongruent compared to congruent trials. It has been suggested that CA is caused by the exertion of flexible cognitive control, supported by many behavioral and neuroimaging studies; however, it remains unclear how conflict‐related features of the preceding trial are conveyed to subsequent trials for following adaptation. This review aims to summarize evidence supporting the top‐down modulation of the dorsolateral prefrontal cortex and passive short‐term maintenance in the posterior brain areas as mechanisms underlying CA, respectively, and to suggest a new integrated view of CA, including active maintenance in working memory. We review empirical evidences suggesting that both dorsolateral prefrontal cortex and posterior brain regions play critical roles in CA, rather than either top‐down modulation or passive maintenance alone. Although the active maintenance view of CA appears to explain many existing findings, empirical studies are required to directly test this view. 相似文献
Background: The aim of this paper is to shed light on the notion of fear and inter-personal working relationships, and to promote safe midwifery practice, by critically reflecting on our practice and being aware of fear appeals and the protection motivation theory (PMT).
Theory: PMT provides a general account of the impact of persuasive communication, emphasising the cognitive processes that mediate behaviour change and questions whether ‘fear appeals’ could influence behaviour. Discussion: It is possible that when a midwife decides on a particular care pathway, she determines the degree and perception of the four elements of the PMT; severity, vulnerability, response-efficacy and self-efficacy. If the midwife decides that both the degree of severity and her perception of vulnerability are high, whereas response and self-efficacy perceptions are low, she will probably decide against her original care pathway. For the PMT to be used safely, an appropriate judgement call is required and is based on full understanding of the situation, effective communication with the multidisciplinary team, full knowledge of the proposed care, and competence and confidence in the proposed care. Conclusion: By critically reflecting on their practice and using the PMT, the author believes that midwives will be able to work in partnership with obstetricians to provide safe and effective care within their sphere of practice and in the absence of fear. 相似文献
In our contemporary age, where a combination of individualism and mutual distrust is unhappily common among people and society is “liquid” and disoriented, so-called intermediate units (groups, associations) are a precious resource that promotes positive coexistence within organizations and in local communities, too. The present contribution describes an example of such an intermediate unit, the Talent Club, located in a peripheral neighborhood of a metropolitan area in northern Italy. This case study shows the development of positive living and working together in organizations and their transformation in the tool for community development and good coexistence. Qualitative and quantitative data show that the relational aspect is crucial because it promotes authentic exchange among people, supporting participation and social cohesion against self-referential habits and isolation. Although at present the Talent Club is mostly functioning in a affiliating coexistence among members, seeds of a more generative coexistence are clearly detectable. 相似文献
Are the effects of memory and attention on perception synergistic, antagonistic, or independent? Tested separately, memory and attention have been shown to affect the accuracy of orientation judgements. When multiple stimuli are presented sequentially versus simultaneously, error variance is reduced. When a target is validly cued, precision is increased. What if they are manipulated together? We combined memory and attention manipulations in an orientation judgement task to answer this question. Two circular gratings were presented sequentially or simultaneously. On some trials a brief luminance cue preceded the stimuli. Participants were cued to report the orientation of one of the two gratings by rotating a response grating. We replicated the finding that error variance is reduced on sequential trials. Critically, we found interacting effects of memory and attention. Valid cueing reduced the median, absolute error only when two stimuli appeared together and improved it to the level of performance on uncued sequential trials, whereas invalid cueing always increased error. This effect was not mediated by cue predictiveness; however, predictive cues reduced the standard deviation of the error distribution, whereas nonpredictive cues reduced “guessing”. Our results suggest that, when the demand on memory is greater than a single stimulus, attention is a bottom-up process that prioritizes stimuli for consolidation. Thus attention and memory are synergistic. 相似文献
Repeatedly encountering a visual search display with the target located at a fixed position relative to the distractors facilitates target detection, relative to novel displays – which is attributed to search guidance by (acquired) long‐term memory (LTM) of the distractor ‘context’ of the target. Previous research has shown that this ‘contextual cueing’ effect is severely impeded during learning when participants have to perform a demanding spatial working memory (WM) task concurrently with the search task, though it does become manifest when the WM task is removed. This has led to the proposal that search guidance by LT context memories critically depends on spatial WM to become ‘expressed’ in behaviour. On this background, this study, of two experiments, asked: (1) Would contextual cueing eventually emerge under dual‐task learning conditions if the practice on the task(s) is extended beyond the short training implemented in previous studies? and given sufficient practice, (2) Would performing the search under dual‐task conditions actually lead to an increased cueing effect compared to performing the visual search task alone? The answer is affirmative to both questions. In particular, Experiment 1 showed that a robust contextual cueing effect emerges within 360–720 dual‐task trials as compared to some 240 single‐task trials. Further, Experiment 2 showed that when dual‐ and single‐task conditions are performed in alternating trials blocks, the cueing effect for the very same set of repeated displays is significantly larger in dual‐task blocks than in single‐task blocks. This pattern of effects suggests that dual‐task practice eventually leads to direct, or ‘automatic’, guidance of visual search by learnt spatial LTM representations, bypassing WM processes. These processes are normally engaged in single‐task performance might actually interfere with direct LTM‐based search guidance. 相似文献
This special issue of the British Journal of Psychology brings together cutting edge research on a range of topics in visual working memory (VWM). In this commentary, we attempt to summarize common themes in current VWM research exemplified in this issue. The articles include several reviews of important topics as well as empirical papers covering three main themes. The first concerns the nature of mental representations of memoranda in the commonly used delayed estimation task, where both fine‐grained and broad categorical details appear to be represented, and their susceptibility to interference. The second concerns interactions between VWM representations, both those that produce individuation of representations and those that create an overarching ensemble structure. Finally, the third main topic concerns the use of VWM during visual search and in the learning of repeated configurations in search displays. The work presented here, and other work in the field, points to a rich interplay between representations in VWM but also between VWM and information in long‐term memory. Opportunities for further investigation are highlighted throughout. 相似文献