Nonconscious Learning From Crowded Sequences

Can people learn complex information without conscious awareness? Implicit learning—learning without awareness of what has been learned—has been the focus of intense investigation over the last 50 years. However, it remains controversial whether complex knowledge can be learned implicitly. In the research reported here, we addressed this challenge by asking participants to differentiate between sequences of symbols they could not perceive consciously. Using an operant-conditioning task, we showed that participants learned to associate distinct sequences of crowded (nondiscriminable) symbols with their respective monetary outcomes (reward or punishment). Overall, our study demonstrates that sensitivity to sequential regularities can arise through the nonconscious temporal integration of perceptual information.

[1]  D H Brainard,et al.  The Psychophysics Toolbox. , 1997, Spatial vision.

[2]  Simon van Gaal,et al.  Unconscious Activation of the Prefrontal No-Go Network , 2010, The Journal of Neuroscience.

[3]  M. Carrasco,et al.  Nonconscious fear is quickly acquired but swiftly forgotten , 2012, Current Biology.

[4]  Axel Cleeremans,et al.  Implicit sequence learning: The truth is in the details , 1998 .

[5]  Sid Kouider,et al.  Preference Is Biased by Crowded Facial Expressions , 2011, Psychological science.

[6]  Patrick Cavanagh,et al.  Semantic Priming From Crowded Words , 2012, Psychological science.

[7]  D. Shanks,et al.  Characteristics of dissociable human learning systems , 1994, Behavioral and Brain Sciences.

[8]  Axel Cleeremans,et al.  Can sequence learning be implicit? New evidence with the process dissociation procedure , 2001, Psychonomic bulletin & review.

[9]  H. Aarts,et al.  Learning of predictive relations between events depends on attention, not on awareness , 2011, Consciousness and Cognition.

[10]  D. Shanks.  Learning: from association to cognition. , 2010, Annual review of psychology.

[11]  Sid Kouider,et al.  Nonconscious Influences from Emotional Faces: A Comparison of Visual Crowding, Masking, and Continuous Flash Suppression , 2012, Front. Psychology.

[12]  Michael A. Stadler,et al.  Handbook of implicit learning , 1998 .

[13]  V. Lamme,et al.  How Awareness Changes the Relative Weights of Evidence During Human Decision-Making , 2011, PLoS biology.

[14]  J. Changeux,et al.  Experimental and Theoretical Approaches to Conscious Processing , 2011, Neuron.

[15]  Sid Kouider,et al.  Multi-feature objects elicit nonconscious priming despite crowding. , 2011, Journal of vision.

[16]  A. Reber.  Implicit learning of artificial grammars , 1967 .

[17]  Stanislas Dehaene,et al.  The cognitive architecture for chaining of two mental operations , 2009, Cognition.

[18]  Ludovic Ferrand,et al.  The masked repetition priming effect dissipates when increasing the inter-stimulus interval: Evidence from word naming , 1996 .

[19]  D G Pelli,et al.  The VideoToolbox software for visual psychophysics: transforming numbers into movies. , 1997, Spatial vision.

[20]  Richard L. Abrams,et al.  Three Cognitive Markers of Unconscious Semantic Activation , 1996, Science.

[21]  E. Robertson.  The Serial Reaction Time Task: Implicit Motor Skill Learning? , 2007, The Journal of Neuroscience.

[22]  M. Nissen,et al.  Attentional requirements of learning: Evidence from performance measures , 1987, Cognitive Psychology.

[23]  R. Dolan,et al.  Subliminal Instrumental Conditioning Demonstrated in the Human Brain , 2008, Neuron.

[24]  Aaron R. Seitz,et al.  Rewards Evoke Learning of Unconsciously Processed Visual Stimuli in Adult Humans , 2009, Neuron.

[25]  Emmanuel Dupoux,et al.  Subliminal speech perception and auditory streaming , 2008, Cognition.

[26]  S. Dehaene,et al.  Levels of processing during non-conscious perception: a critical review of visual masking , 2007, Philosophical Transactions of the Royal Society B: Biological Sciences.

[27]  Z. Dienes,et al.  Implicit learning: Below the subjective threshold , 1997 .

[28]  J. van Leeuwen,et al.  Sequence Learning , 2001, Lecture Notes in Computer Science.

[29]  D. Shanks,et al.  The role of awareness in Pavlovian conditioning: empirical evidence and theoretical implications. , 2002, Journal of experimental psychology. Animal behavior processes.

[30]  P. Cavanagh,et al.  Attentional resolution and the locus of visual awareness , 1996, Nature.