Yang Cheng-Ta, Hsu Yung-Fong, Huang Hsin-Yi, Yeh Yei-Yu
Department of Psychology and Institute of Cognitive Science, National Cheng Kung University, Tainan, Taiwan.
Acta Psychol (Amst). 2011 Nov;138(3):377-89. doi: 10.1016/j.actpsy.2011.09.003. Epub 2011 Oct 4.
This study tests the effect of relative saliency on perceptual comparison and decision processes in the context of change detection in which distinct visual mechanisms process two features (e.g., luminance and orientation). Townsend and Nozawa's (1995) systems factorial technology was used to investigate the process architecture and stopping rule when deciding whether luminance or orientation of a Gabor patch had changed. Experiment 1 found individual differences in decision strategies when we did not control relative saliency. One group of participants adopted co-active processing, and the other group adopted serial self-terminating processing to detect the change signals. When Experiment 2 eliminated the relative saliency, all but one observer adopted parallel processing and followed a self-terminating rule. These results support the relative saliency hypothesis and highlight the fact that observers adopt different change-detection strategies for two features, especially when relative saliency exists between the two feature dimensions.
本研究在变化检测的背景下测试了相对显著性对感知比较和决策过程的影响，其中不同的视觉机制处理两种特征（例如亮度和方向）。采用汤森德和野泽（1995）的系统因子技术来研究在判断一个加博尔斑块的亮度或方向是否发生变化时的过程架构和停止规则。实验1发现，在我们不控制相对显著性时，决策策略存在个体差异。一组参与者采用并行处理，另一组采用串行自终止处理来检测变化信号。当实验2消除相对显著性时，除一名观察者外，所有观察者都采用并行处理并遵循自终止规则。这些结果支持了相对显著性假说，并突出了这样一个事实，即观察者对两种特征采用不同的变化检测策略，尤其是当两个特征维度之间存在相对显著性时。
