Cue combination in a combined feature contrast detection and figure identification task
Cue combination in a combined feature contrast detection and figure identification task
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DOI：
10.1016/j.visres.2006.07.009
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发表时间：
2006-11-01
期刊：
影响因子：
1.8
通讯作者：
Hagemann, Cordula
中科院分区：
文献类型：
--
作者：
Meinhardt, Guenter;Persike, Malte;Hagemann, Cordula
目标人物定义的空间频率，方向或两个线索的特征对比度被检测到的Gabor随机场和它们的形状被确定在一个双重任务的范例。性能提高，增加功能对比度和强烈的相关性，这两项任务。受试者表现出显着更好的组合线索比单一线索。由于线索总和的改善是强于预测的独立功能的具体机制的假设，并增加与单一线索实现的性能水平，直到它是有限的天花板效应。此外，线索总和之间的任务也有很强的相关性：当有好处，由于额外的线索在特征对比度检测，也有好处的数字识别。对于相同的性能水平，实现与单一的线索，线索总和一般较大的图形识别比在功能对比度检测，表示更多的好处时，涉及的形状和表面形成的过程。我们的研究结果表明，线索组合改善空间形式完成和图形-背景分离在嘈杂的环境中，因此导致更稳定的物体视觉。(c)2006爱思唯尔有限公司保留所有权利。
Target figures defined by feature contrast in spatial frequency, orientation or both cues had to be detected in Gabor random fields and their shape had to be identified in a dual task paradigm. Performance improved with increasing feature contrast and was strongly correlated among both tasks. Subjects performed significantly better with combined cues than with single cues. The improvement due to cue summation was stronger than predicted by the assumption of independent feature specific mechanisms, and increased with the performance level achieved with single cues until it was limited by ceiling effects. Further, cue summation was also strongly correlated among tasks: when there was benefit due to the additional cue in feature contrast detection, there was also benefit in figure identification. For the same performance level achieved with single cues, cue summation was generally larger in figure identification than in feature contrast detection, indicating more benefit when processes of shape and surface formation are involved. Our results suggest that cue combination improves spatial form completion and figure-ground segregation in noisy environments, and therefore leads to more stable object vision. (c) 2006 Elsevier Ltd. All rights reserved.