Relative salience affects the process of detecting changes in orientation and luminance

Cheng Ta Yang, Yung Fong Hsu, Hsin Yi Huang, Yei Yu Yeh

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)377-389
Number of pages13
JournalActa Psychologica
Issue number3
Publication statusPublished - Nov 2011
Externally publishedYes


  • Change detection
  • Comparison process
  • Decision process
  • Systems factorial technology

ASJC Scopus subject areas

  • Experimental and Cognitive Psychology
  • Developmental and Educational Psychology
  • Arts and Humanities (miscellaneous)


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