Implicit Perception and Level of Processing in Object-Substitution Masking

Object-substitution masking (OSM) refers to reduced target discrimination when the target is surrounded by a sparse mask that does not overlap with the target in space but trails it in time. In four experiments, we used a novel paradigm to investigate the extent of processing of a masked target in OSM. We measured response-compatibility effects between target and mask, both when the offsets were simultaneous and when the offset of the mask was delayed. Evidence for both OSM and a dissociation between perception and awareness was found when detecting the match between the target and the mask required feature but not categorical analyses. Our results suggest that the locus of disruption in OSM is likely to be beyond feature analysis of the unreported target.

[1]  S J Luck,et al.  Spatial filtering during visual search: evidence from human electrophysiology. , 1994, Journal of experimental psychology. Human perception and performance.

[2]  James E. Hoffman,et al.  Object Substitution Masking Interferes With Semantic Processing , 2006, Psychological science.

[3]  John G. Taylor,et al.  A competition for consciousness? , 1996, Neurocomputing.

[4]  M. Shadlen,et al.  Exploring the Neurophysiology of Decisions , 1998, Neuron.

[5]  Keith A Hutchison,et al.  Masking by object substitution: dissociation of masking and cuing effects. , 2002, Journal of experimental psychology. Human perception and performance.

[6]  G. Woodman,et al.  Dissociations Among Attention, Perception, and Awareness During Object-Substitution Masking , 2003, Psychological science.

[7]  R. L. Valois,et al.  Temporal dynamics of chromatic tuning in macaque primary visual cortex , 1998, Nature.

[8]  M. Chun,et al.  The spatial gradient of visual masking by object substitution , 2001, Vision Research.

[9]  Ronald A. Rensink,et al.  Competition for consciousness among visual events: the psychophysics of reentrant visual processes. , 2000, Journal of experimental psychology. General.

[10]  Katherine M. Mathis,et al.  Gestalt grouping and common onset masking , 2002, Perception & psychophysics.

[11]  V. Lamme,et al.  The distinct modes of vision offered by feedforward and recurrent processing , 2000, Trends in Neurosciences.

[12]  J. Bullier.  Feedback connections and conscious vision , 2001, Trends in Cognitive Sciences.

[13]  J. Enns,et al.  Object Substitution: A New Form of Masking in Unattended Visual Locations , 1997 .

[14]  A. Cowey,et al.  Magnetically induced phosphenes in sighted, blind and blindsighted observers , 2000, Neuroreport.

[15]  M. Chun,et al.  Asymmetric object substitution masking. , 2001, Journal of experimental psychology. Human perception and performance.

[16]  M. Kutas,et al.  Reading senseless sentences: brain potentials reflect semantic incongruity. , 1980, Science.

[17]  Alejandro Lleras,et al.  How much like a target can a mask be? Geometric, spatial, and temporal similarity in priming: a reply to Schlaghecken and Eimer (2006). , 2006, Journal of experimental psychology. General.

[18]  A. F. Rossi,et al.  The representation of brightness in primary visual cortex. , 1996, Science.

[19]  S Kornblum,et al.  Dynamics of Single Neuron Activity in Monkey Primary Motor Cortex Related to Sensorimotor Transformation , 1997, The Journal of Neuroscience.

[20]  Thomas A Carlson,et al.  No Representation Without Awareness in the Lateral Occipital Cortex , 2007, Psychological science.

[21]  Á. Pascual-Leone,et al.  Fast Backprojections from the Motion to the Primary Visual Area Necessary for Visual Awareness , 2001, Science.

[22]  A. Mack.  Inattentional Blindness , 2003 .

[23]  Denis Cousineau,et al.  Confidence intervals in within-subject designs: A simpler solution to Loftus and Masson's method , 2005 .

[24]  J. Enns,et al.  What’s new in visual masking? , 2000, Trends in Cognitive Sciences.

[25]  S. T. Klapp,et al.  The negative compatibility effect: unconscious inhibition influences reaction time and response selection. , 2002, Journal of experimental psychology. General.

[26]  Tony Ro,et al.  Feedback Contributions to Visual Awareness in Human Occipital Cortex , 2003, Current Biology.

[27]  K L Shapiro,et al.  Temporary suppression of visual processing in an RSVP task: an attentional blink? . , 1992, Journal of experimental psychology. Human perception and performance.

[28]  J. Driver,et al.  Priming from the Attentional Blink: A Failure to Extract Visual Tokens but Not Visual Types , 1997 .

[29]  M. Eimer,et al.  Effects of masked stimuli on motor activation: behavioral and electrophysiological evidence. , 1998, Journal of experimental psychology. Human perception and performance.

[30]  Rolf Verleger,et al.  Qualitative differences between conscious and nonconscious processing? On inverse priming induced by masked arrows. , 2004, Journal of experimental psychology. General.

[31]  D. V. van Essen,et al.  Neuronal responses to static texture patterns in area V1 of the alert macaque monkey. , 1992, Journal of neurophysiology.

[32]  J. Enns,et al.  Negative compatibility or object updating? A cautionary tale of mask-dependent priming. , 2004, Journal of experimental psychology. General.

[33]  C. Moore,et al.  When the target becomes the mask: using apparent motion to isolate the object-level component of object substitution masking. , 2003, Journal of experimental psychology. Human perception and performance.

[34]  Michael Pilling,et al.  What is being masked in object substitution masking? , 2006, Journal of experimental psychology. Human perception and performance.

[35]  J. Schwarzbach,et al.  Different time courses for visual perception and action priming , 2003, Proceedings of the National Academy of Sciences of the United States of America.

[36]  H. Egeth,et al.  Perception without attention: evidence of grouping under conditions of inattention. , 1997, Journal of experimental psychology. Human perception and performance.