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241.
The priming of popout (PoP) (Maljkovic & Nakayama, 1994, 1996) increases the speed of attentional deployment to subsequent targets having the same feature characteristic and relative position, it lasts for approximately 5-8 trials, and is cumulative. Here we establish PoP as an example of short-term implicit memory by showing that it is qualitatively different from explicit memory. Using a post-cued recall procedure embedded in the stream of search task trials, we show that explicit memory is not selective as is PoP and is of much shorter duration. As such we argue that explicit memory is unlikely to account for the properties of PoP. In examining the decay of PoP, we find that: PoP is not evident after a 90sec delay, it does not show passive decay over much shorter intervals (1-3sec), and it gets decremented by attentional deployments to visually dissimilar stimuli, the size of the decrement being related to task difficulty. The results, taken together, suggest that PoP reflects a functionally beneficial memory system, specialized for the rapid and automatic selection of items for focal attention and saccadic eye movements. 相似文献
242.
Véronique Salvano-Pardieu Brian Wink Alain Taliercio Roger Fontaine Ken I. Manktelow Walter H. Ehrenstein 《Visual cognition》2013,21(4):591-616
Findings that illusory contours can facilitate visual detection of a subthreshold real line (Dresp & Bonnet, 1995) were not replicated, when line-induced instead of edge-induced illusory contour stimuli were used (Salvano-Pardieu et al., 2006). Rather, the results of the latter study supported the importance of spatial cues. The present study was designed to investigate whether spatial cueing might also facilitate detection of targets superimposed on edge-induced illusory contours. In Experiment 1, a target line was superimposed on the illusory contour of a Kanizsa square, presented between dots with a precise or distant location to the target, or on a homogeneous field (control). Detection of the target was poorest for the control, followed by the distant-dots and Kanizsa conditions, whereas it was best for precisely cueing dots. Experiment 2 replicated the conditions in Experiment 1 (Kanizsa, precisely cueing dots, and control) with additional controls for possible luminance effects. The two new conditions matched the Kanizsa condition for overall luminance and preciseness of spatial cueing without generating illusory contours. Performance was best in the dot condition and worst in the control, but the same across the Kanizsa and matched luminance conditions. In Experiments 3 and 4, the stimuli presented were matched more closely to those used by Dresp and Bonnet, but still the results confirmed those obtained in our Experiments 1 and 2. Together, these experiments strongly suggest that detection is also facilitated by spatial cueing rather than subthreshold summation, in the case of edge-induced illusory contours. 相似文献
243.
Daniel C. Richardson Michael J. Spivey Lawrence W. Barsalou Ken McRae 《Cognitive Science》2003,27(5):767-780
Previous research has shown that na_ve participants display a high level of agreement when asked to choose or drawschematic representations, or image schemas, of concrete and abstract verbs [Proceedings of the 23rd Annual Meeting of the Cognitive Science Society, 2001, Erlbaum, Mawhah, NJ, p. 873]. For example, participants tended to ascribe a horizontal image schema to push, and a vertical image schema to respect. This consistency in offline data is preliminary evidence that language invokes spatial forms of representation. It also provided norms that were used in the present research to investigate the activation of spatial image schemas during online language comprehension. We predicted that if comprehending a verb activates a spatial representation that is extended along a particular horizontal or vertical axis, it will affect other forms of spatial processing along that axis. Participants listened to short sentences while engaged in a visual discrimination task (Experiment 1) and a picture memory task (Experiment 2). In both cases, reaction times showed an interaction between the horizontal/vertical nature of the verb's image schema, and the horizontal/vertical position of the visual stimuli. We argue that such spatial effects of verb comprehension provide evidence for the perceptual–motor character of linguistic representations. 相似文献
244.
245.
Niall Galbraith Ken Manktelow Neil Morris 《British journal of psychology (London, England : 1953)》2008,99(1):29-44
Previous studies (e.g. Moller & Husby, 2000 ; Blackwood et al., 2004 ) have revealed that delusional thinking is accompanied by an exaggerated focus upon the self and upon stimuli that are perceived to be related to the self. The objective was to examine whether those high in subclinical delusional ideation exhibit a heightened tendency for self‐reference. Using a mixed design, healthy individuals, classified into high‐ and low‐scoring groups on the Peters et al. Delusions Inventory ( Peters, Day, & Garety, 1996 ), were compared on everyday reasoning tasks across three experiments. High‐PDI scorers, in contrast to the low‐PDI group, rated self‐referent objections to everyday arguments as stronger than other‐referent objections and formulated more self‐referent assertion‐based objections to everyday arguments. The findings support the notion that subclinical delusional ideation is linked to a self‐reference bias, which is evident in the sort of everyday thinking that people engage in when forming or evaluating their beliefs and which may contribute to delusion formation. 相似文献
246.
Nearly all studies on perception and cognition have used discrete responses to infer internal cognitive processes. In the current study, we demonstrate that visually-guided manual reaching can provide new opportunities to access internal processes over time. In each trial, participants were required to compare a single digit Arabic number presented on the center square with the standard, 5. Participants were asked to reach and touch one of three squares on the screen with their index finger while their hand movement trajectories were recorded: the left square for 1-4, the center for 5, and the right for 6-9. Direct evidence for an analogue representation of numbers was found in early as well as in later portions of hand trajectories, showing systematic shifts in position for small differences in numerical magnitude. 相似文献
247.
The aim of this study was to assess the impact of the Newfoundland and Labrador groundfish moratorium on the health and social wellness of two communities severely affected by the industry collapse. A qualitative study was conducted involving individual and group interviews with residents from communities in which differences (as indexed primarily by economic and demographic statistics) were observed. Using the concept of social capital and its associated themes of help and support, trust, leadership, and civic engagement, it was observed that the ‘high crisis community’ also demonstrated negative alterations in social and political characteristics which may have compromised its capacity to cope with the crisis and translated into detriments in resident wellness. Among a variety of identified challenges, out‐migration appeared to be the greatest threat as it has translated into an assortment of negative realities. The utility of social capital as a framework for understanding community crises is also discussed. 相似文献
248.
Ken Laidlaw Susan McAlpine 《Journal of Rational-Emotive & Cognitive-Behavior Therapy》2008,26(4):250-262
This paper discusses the treatment of depression in older adults (over age 65) using cognitive therapy techniques first developed
by Beck and colleagues. The focus of this paper concerns whether modifications of CBT are required in order to ensure maximal
efficacy and discusses what modifications may be suitable by advocating conceptual and theoretical reasons for their adoption.
Some important contextual factors may need to be taken account of when working with older people such as dealing with expectancies
about lifespan, the likelihood of chronic physical illness and longevity and chronicity of the personal history of problems.
It is our contention that much more has been written about outcome in CBT with older people than has been written about psychotherapy
process issues. This paper aims to address this perceived gap in the literature. 相似文献
249.
250.
The under‐diagnosis and inappropriate treatment of depression in primary care has become a serious public health problem despite the development of many clinical guidelines to guide recognition and treatment of the disorder. This study aims to investigate decision‐making processes and to identify factors which influence general practitioners' (GPs) prescribing decisions and how these factors differ from those the guidelines recommend. Brunswik's lens model, from Social Judgement Theory (SJT), was employed to explore individual treatment decision policies of 40 GPs in the Grampian region of Scotland for 20 case vignettes. These individual policies were then aggregated and compared with those derived from guideline recommendations; important differences emerged between the two in the utilization of cues and there was considerable variation between GPs' policies. Guidelines placed more importance on the duration of symptoms whereas GPs gave weight also to particular symptoms, such as ‘thoughts of suicide’ and ‘sleep disturbance’ and patient treatment preference. GPs prescribed antidepressants at a greater rate than was recommended by the guidelines. The findings have important implications for implementation strategies, which maybe developed to accompany clinical guidelines. Copyright © 2002 John Wiley & Sons, Ltd. 相似文献