Asymmetries in preattentive line detection

We tested the relative contribution of absolute orientation and collinearity to asymmetries in preattentive line detection. Subjects reported the location of a single line that was tilted by 16 deg against the orientation of the background lines. Perceptual pop-out strength was quantified as the threshold presentation time to correctly locate the salient element. We found that (1) threshold times were significantly shorter in vertical than in oblique background lines and that (2) threshold times were significantly shorter in collinear than in non-collinear background lines. Our data suggest that the sensitivity of preattentive processes for orientation gradients is modulated by both collinearity and absolute orientation.

[1]  A. Watson,et al.  Quest: A Bayesian adaptive psychometric method , 1983, Perception & psychophysics.

[2]  H. Nothdurft.  Feature analysis and the role of similarity in preattentive vision , 1992, Perception & psychophysics.

[3]  A Treisman,et al.  Feature analysis in early vision: evidence from search asymmetries. , 1988, Psychological review.

[4]  D. Foster,et al.  Horizontal—vertical filters in early vision predict anomalous line-orientation identification frequencies , 1991, Proceedings of the Royal Society of London. Series B: Biological Sciences.

[5]  David J. Field,et al.  Contour integration by the human visual system: Evidence for a local “association field” , 1993, Vision Research.

[6]  B. Julesz,et al.  Human factors and behavioral science: Textons, the fundamental elements in preattentive vision and perception of textures , 1983, The Bell System Technical Journal.

[7]  R. Browse,et al.  Micropattern properties and presentation conditions influencing visual texture discrimination , 1987, Perception & psychophysics.

[8]  D. Foster,et al.  Asymmetries in oriented-line detection indicate two orthogonal filters in early vision , 1991, Proceedings of the Royal Society of London. Series B: Biological Sciences.

[9]  B. S. Rubenstein,et al.  Spatial variability as a limiting factor in texture-discrimination tasks: implications for performance asymmetries. , 1990, Journal of the Optical Society of America. A, Optics and image science.

[10]  H. Nothdurft.  Orientation sensitivity and texture segmentation in patterns with different line orientation , 1985, Vision Research.

[11]  J. Bergen,et al.  Texture segregation and orientation gradient , 1991, Vision Research.

[12]  H C Nothdurft,et al.  Texton segregation by associated differences in global and local luminance distribution , 1990, Proceedings of the Royal Society of London. B. Biological Sciences.

[13]  Lewis O. Harvey,et al.  Efficient estimation of sensory thresholds , 1986 .

[14]  D Sagi,et al.  Where practice makes perfect in texture discrimination: evidence for primary visual cortex plasticity. , 1991, Proceedings of the National Academy of Sciences of the United States of America.

[15]  U. Polat,et al.  Lateral interactions between spatial channels: Suppression and facilitation revealed by lateral masking experiments , 1993, Vision Research.

[16]  H. Nothdurft.  Sensitivity for structure gradient in texture discrimination tasks , 1985, Vision Research.