+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Attention without awareness: Attentional modulation of perceptual grouping without awareness



Attention without awareness: Attentional modulation of perceptual grouping without awareness



Attention Perception and Psychophysics 80(3): 691-701



Perceptual grouping is the process through which the perceptual system combines local stimuli into a more global perceptual unit. Previous studies have shown attention to be a modulatory factor for perceptual grouping. However, these studies mainly used explicit measurements, and, thus, whether attention can modulate perceptual grouping without awareness is still relatively unexplored. To clarify the relationship between attention and perceptual grouping, the present study aims to explore how attention interacts with perceptual grouping without awareness. The task was to judge the relative lengths of two centrally presented horizontal bars while a railway-shaped pattern defined by color similarity was presented in the background. Although the observers were unaware of the railway-shaped pattern, their line-length judgment was biased by that pattern, which induced a Ponzo illusion, indicating grouping without awareness. More importantly, an attentional modulatory effect without awareness was manifested as evident by the observer's performance being more often biased when the railway-shaped pattern was formed by an attended color than when it was formed by an unattended one. Also, the attentional modulation effect was shown to be dynamic, being more pronounced with a short presentation time than a longer one. The results of the present study not only clarify the relationship between attention and perceptual grouping but also further contribute to our understanding of attention and awareness by corroborating the dissociation between attention and awareness.

Accession: 051409145

Download citation: RISBibTeXText

PMID: 29280049

DOI: 10.3758/s13414-017-1474-7


Related references

Attentional modulation of sensorimotor processes in the absence of perceptual awareness. Proceedings of the National Academy of Sciences of the United States of America 103(27): 10520-10525, 2006

Can perceptual grouping unfold in the absence of awareness? Comparing grouping during continuous flash suppression and sandwich masking. Consciousness and Cognition 60: 37-51, 2018

Attentional tuning resets after failures of perceptual awareness. Plos one 8(4): E60623, 2013

Neural mechanisms of attentional modulation of perceptual grouping by collinearity. Neuroreport 16(6): 567-570, 2005

Perceptual grouping without awareness: superiority of Kanizsa triangle in breaking interocular suppression. Plos one 7(6): E40106, 2012

Attentional modulation of perceptual grouping in human visual cortex: ERP studies. Human Brain Mapping 26(3): 199-209, 2005

Illusory Form Perception and Perceptual Grouping Operations under Conditions of Restricted Visual Awareness. Spanish Journal of Psychology 21: E42, 2018

Awareness as a perceptual model of attention. Cognitive Neuroscience 2(2): 125-127, 2011

Subjective discriminability of invisibility: a framework for distinguishing perceptual and attentional failures of awareness. Consciousness and Cognition 19(4): 1045-1057, 2010

The attentional blink: past, present, and future of a blind spot in perceptual awareness. Neuroscience and Biobehavioral Reviews 34(6): 947-957, 2010

Meta-Attention: The Development of Awareness of the Attentional Process. Journal of General Psychology 106(1): 27-33, 1982

Attentional modulation of perceptual grouping in human visual cortex: functional MRI studies. Human Brain Mapping 25(4): 424-432, 2005

Binding, spatial attention and perceptual awareness. Nature Reviews Neuroscience 4(2): 93-102, 2003

Dissociating the Neural Basis of Conceptual Self-Awareness from Perceptual Awareness and Unaware Self-Processing. Cerebral Cortex 27(7): 3768-3781, 2017

An attentional blink in the absence of spatial attention: a cost of awareness?. Psychological Research 2018:, 2018