Effect of short and long exposure duration and dual-tasking on a global-local task
Effect of short and long exposure duration and dual-tasking on a global-local task
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DOI：
10.1016/j.actpsy.2005.12.002
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发表时间：
2006-07-01
影响因子：
1.8
通讯作者：
Fernandes, Myra A.
中科院分区：
文献类型：
--
作者：
Andres, Allison J. D.;Fernandes, Myra A.
过去的研究已经证明了对视觉呈现的分层刺激的反应的整体优势，使得在不一致的试验中，整体形式干扰了对局部水平的反应[Kimchi，R.（1992年）。整体加工和全球/本地范式的首要性：一个批判性的评论。Psychological Bulletin，112，24-38].在实验1中，32名成年人进行交替块的全球或本地识别的层次字母刺激，其中的全球和本地的字母是一致的，不一致的，或中性的，并提出了在一个短（17毫秒）或长（100毫秒）的曝光时间。在这两个时期都表现出全球优势。在本地导向的任务，干扰不一致，相对于中性，试验观察到在两个曝光时间，但促进一致的试验，相对于中性试验，只有当刺激呈现在长曝光时间。在实验2中，全球或本地识别进行了另一组24名成年人在一个长或短的曝光时间，并在充分注意（FA）或双任务（DT）的条件下与数字监测任务。根据FA，我们再次发现显着的干扰，在两个曝光时间，但促进只有在长曝光时间。在DT条件下，在短时间内的易化和干扰模式保持不变。然而，在长时间内，双任务消除干扰RT，但不是错误的数据，而促进存在于两组数据。结果是符合感知帐户的全球优势，并建议，促进需要有意识地介导的过程，而干扰不。(c)2005 Elsevier B. V.保留所有权利。
Past research has demonstrated a global advantage in responses to visually presented hierarchical stimuli such that, on incongruent trials, the global form interferes with responses to the local level [Kimchi, R. (1992). Primacy of wholistic processing and global/local paradigm: A critical review. Psychological Bulletin, 112, 24-38]. In Experiment 1, 32 adults performed alternating blocks of global or local identification of hierarchical letter stimuli in which the global and local letters were congruent, incongruent, or neutral, and were presented at either a short (17 ms) or long (100 ms) exposure duration. A global advantage was demonstrated at both durations. In the local-directed task, interference on incongruent, relative to neutral, trials was observed at both exposure durations, but facilitation on congruent trials, relative to neutral trials, was present only when stimuli were presented at the long exposure duration. In Experiment 2, global or local identification was performed by another group of 24 adults at either a long or short exposure duration, and also under conditions of full attention (FA) or dual-task (DT) conditions with a digit-monitoring task. Under FA, we again found significant interference at both exposure durations, but facilitation only at the long exposure duration. Under DT conditions, the pattern of facilitation and interference at the short duration remained unchanged. At the long duration, however, dual-tasking eliminated interference in the RT but not error data, while facilitation was present in both sets of data. Results are in line with a perceptual account of the global advantage, and suggest that facilitation requires consciously-mediated processes, whereas interference does not. (c) 2005 Elsevier B.V. All rights reserved.