Neuro-cognitive mechanisms of conscious and unconscious visual perception: From a plethora of phenomena to general principles

• Authors: Markus Kiefer , Ulrich Ansorge , John-Dylan Haynes , Fred Hamker , Uwe Mattler , Rolf Verleger , Michael Niedeggen

Abstracts

EN

Psychological and neuroscience approaches have promoted much progress in elucidating the cognitive and neural mechanisms that underlie phenomenal visual awareness during the last decades. In this article, we provide an overview of the latest research investigating important phenomena in conscious and unconscious vision. We identify general principles to characterize conscious and unconscious visual perception, which may serve as important building blocks for a unified model to explain the plethora of findings. We argue that in particular the integration of principles from both conscious and unconscious vision is advantageous and provides critical constraints for developing adequate theoretical models. Based on the principles identified in our review, we outline essential components of a unified model of conscious and unconscious visual perception. We propose thatawarenessrefers to consolidated visual representations, which are accessible to the entire brain and therefore globally available. However,visual awarenessnot only depends on consolidation within the visual system, but is additionally the result of a post-sensory gating process, which is mediated by higher-level cognitive control mechanisms. We further propose that amplification of visual representations by attentional sensitization is not exclusive to the domain of conscious perception, but also applies to visual stimuli, which remain unconscious. Conscious and unconscious processing modes are highly interdependent with influences in both directions. We therefore argue that exactly this interdependence renders a unified model of conscious and unconscious visual perception valuable. Computational modeling jointly with focused experimental research could lead to a better understanding of the plethora of empirical phenomena in consciousness research.

Keywords

EN

consciousness; visual awareness; unconscious cognition; subliminal perception; attention

• Publisher: Wyższa Szkoła Finansów i Zarządzania w Warszawie
• Journal: Advances in Cognitive Psychology
• Year: 2011
• Volume: 7
• Pages: 55-67

Contributors

author

Markus Kiefer

• Department of Psychiatry, University of Ulm, Germany

author

Ulrich Ansorge

• Department of Psychology, University of Vienna, Austria

author

John-Dylan Haynes

• Bernstein Center for Computational Neuroscience, Berlin, Germany

author

Fred Hamker

• Department of Computer Science, Technical University Chemnitz, Germany

author

Uwe Mattler

• Department of Psychology, University of Göttingen, Germany

author

Rolf Verleger

• Department of Neurology, University of Lübeck, Germany

author

Michael Niedeggen

• Department of Psychology, Free University of Berlin, Germany

References

• Ansorge, U., Fuchs, I., Khalid, S., & Kunde, W. (2011). No conflict control in the absence of awareness.Psychological Research, 75, 351-365.
• Ansorge, U., Heumann, M., & Scharlau, I. (2002). Influences of visibility, intentions, and probability in a peripheral cuing task.Consciousness and Cognition, 11, 528-545.
• Ansorge, U., & Horstmann, G. (2007). Preemptive control of attentional capture by colour: Evidence from trial-by-trial analyses and orderings of onsets of capture effects in reaction time distributions.Quarterly Journal of Experimental Psychology, 60, 952-975.
• Ansorge, U., Horstmann, G., & Scharlau, I. (2010). Top-down contingent attentional capture during feed-forward visual processing.Acta Psychologica, 135, 123-126.
• Ansorge, U., Horstmann, G., & Scharlau, I. (2011). Top-down contingent feature-specific orienting with and without awareness of the visual input.Advances in Cognitive Psychology, 7, 108-119.
• Ansorge, U., Horstmann, G., & Worschech, F. (2010). Attentional capture by masked color singletons.Vision Research, 50, 2015-2027.
• Ansorge, U., Kiefer, M., Khalid, S., Grassl, S., & König, P. (2010). Testing the theory of embodied cognition with subliminal words.Cognition, 116, 303-320.
• Ansorge, U., Kiss, M., & Eimer, M. (2009). Goal-driven attentional capture by invisible colours.Psychonomic Bulletin & Review, 16, 648-653.
• Ansorge, U., & Neumann, O. (2005). Intentions determine the effect of invisible metacontrast-masked primes: Evidence for top-down contingencies in a peripheral cueing task.Journal of Experimental Psychology: Human Perception & Performance, 31, 762-777.
• Bachmann, T. (1994).Psychophysiology of visual masking: The fine structure of conscious experience.Commack, NY: Nova Science Publishers.
• Bachmann, T. (2007). Binding binding: Departure points for a different version of the perceptual retouch theory.Advances in Cognitive Psychology, 3, 41-55.
• Block, N. (1995). On a confusion about a function of consciousness.Behavioral and Brain Sciences, 18, 227-287.
• Bode, S., & Haynes, J. D. (2008). Decoding sequential stages of task preparation in the human brain.NeuroImage, 45, 606-613.
• Botvinick, M. M., Braver, T. S., Barch, D. M., Carter, C. S., & Cohen, J. D. (2001). Conflict monitoring and cognitive control.Psychological Review, 108, 624-652.
• Breitmeyer, B. G. (2007). Visual masking: Past accomplishments, present status, future developments.Advances in Cognitive Psychology, 3, 9-20.
• Breitmeyer, B. G., & Ganz, L. (1976). Implications of sustained and transient channels for theories of visual pattern masking, saccadic suppression, and information processing.Psychological Review, 83, 1-36.
• Breitmeyer, B. G., Koc, A., Ziegler, R., & Öğmen, H. (2008). Functional hierarchies of nonconscious visual processing.Vision Research, 48, 1509-1513.
• Breitmeyer, B. G., & Öğmen, H. (2006).Visual masking: Time slices through conscious and unconscious vision.Oxford: Oxford University Press.
• Breitmeyer, B. G., & Tapia, E. (2011). Roles of contour and surface processing in microgenesis of object perception and visual consciousness.Advances in Cognitive Psychology, 7, 68-81.
• Bridgeman, B. (1971). Metacontrast and lateral inhibition.Psychological Review, 78, 528-539.
• Bridgeman, B. (2007). Common-onset masking simulated with a distributed-code model.Advances in Cognitive Psychology, 3, 33-40.
• Brown, L. L., Schneider, J. S., & Lidsky, T. I. (1997). Sensory and cognitive functions of the basal ganglia.Current Opinion in Neurobiology, 7, 157-163.
• Bruchmann, M., Hintze, P., & Mota, S. (2011). The effects of spatial and temporal cueing on metacontrast masking.Advances in Cognitive Psychology, 7, 132-141.
• Carr, T. H., & Dagenbach, D. (1990). Semantic priming and re-petition priming from masked words: Evidence for a center-surround attentional mechanism in perceptual recognition.Journal of Experimental Psychology: Learning, Memory, and Cognition, 16, 341-350.
• Chalmers, D. J. (1995). Facing up to the problem of consciousness.Journal of Consciousness Studies, 2, 200-219.
• Crick, F., & Koch, C. (1990). Towards a neurobiological theory of consciousness.Seminar in the Neurosciences, 2, 263-275.
• Damian, M. F. (2001). Congruity effects evoked by subliminally presented primes: Automaticity rather than semantic processing.Journal of Experimental Psychology: Human Perception & Performance, 27, 154-165.
• Dehaene, S., Changeux, J. P., Naccache, L., Sackur, J., & Sergent, C. (2006). Conscious, preconscious, and subliminal processing: A testable taxonomy.Trends in Cognitive Sciences, 10, 204-211.
• Dehaene, S., Kerszberg, M., & Changeux, J. P. (1998). A neuronal model of a global workspace in effortful cognitive tasks.Proceedings of the National Academy of Sciences USA, 95, 14529-14534.
• Dehaene, S., & Naccache, L. (2001). Towards a cognitive neuroscience of consciousness: Basic evidence and a workspace framework.Cognition, 79, 1-37.
• Dehaene, S., Naccache, L., LeClec'H, G., Koechlin, E., Mueller, M., Dehaene-Lambertz, G., et al. (1998). Imaging unconscious priming.Nature, 395, 597-600.
• Dehaene, S., Sergent, C., & Changeux, J. P. (2003). A neuronal network model linking subjective reports and objective physiological data during conscious perception.Proceedings of the National Academy of Sciences USA, 100, 8520-8525.
• Dennett, D. C., & Kinsbourne, M. (1992). Time and the observer: The where and when of consciousness in the brain.Behavioral and Brain Sciences, 15, 183-247.
• Eckstein, D., & Perrig, W. J. (2007). The influence of intention on masked priming: A study with semantic classification of words.Cognition, 104, 345-376.
• Engel, A. K., Fries, P., König, P., Brecht, M., & Singer, W. (1999). Temporal binding, binocular rivalry, and consciousness.Consciousness and Cognition, 8, 128-151.
• Enns, J. T., & Di Lollo, V. (2000). What's new in visual masking.Trends in Cognitive Sciences, 4, 345-352.
• Fisch, L., Privman, E., Ramot, M., Harel, M., Nir, Y., Kipervasser, S., et al. (2009). Neural "ignition": Enhanced activation linked to perceptual awareness in human ventral stream visual cortex.Neuron, 64, 562-574.
• Greenwald, A. G., Draine, S. C., & Abrams, R. L. (1996). Three cognitive markers of unconscious semantic activation.Science, 273, 1699-1702.
• Hamker, F. H. (2005). The reentry hypothesis: The putative interaction of the frontal eye field, ventrolateral prefrontal cortex, and areas V4, IT for attention and eye movement.Cerebral Cortex, 15, 431-447.
• Hamker, F. H. (2007). The mechanisms of feature inheritance as predicted by a systems-level model of visual attention and decision making.Advances in Cognitive Psychology, 3, 111-123.
• Haynes, J. D., Deichmann, R., & Rees, G. (2005). Eye-specific effects of binocular rivalry in the human lateral geniculate nucleus.Nature, 438, 496-499.
• Haynes, J. D., Driver, J., & Rees, G. (2005). Visibility reflects dynamic changes of effective connectivity between V1 and fusiform cortex.Neuron, 46, 811-821.
• Haynes, J. D., Sakai, K., Rees, G., Gilbert, S., Frith, C., & Passingham, R. E. (2007). Reading hidden intentions in the human brain.Current Biology, 17, 323-328.
• Held, B., Ansorge, U., & Müller, H. (2010). Masked singleton effects.Attention, Perception, & Psychophysics, 72, 2069-2086.
• Hesselmann, G., Niedeggen, M., Sahraie, A., & Milders, M. (2006). Specifying the distractor inhibition account of attention-induced motion blindness.Vision Research, 46, 1048-1056.
• Hopfinger, J. B., Buonocore, M. H., & Mangun, G. R. (2000). The neural mechanisms of top-down attentional control.Nature Neuroscience, 3, 284-291.
• Hopfinger, J. B., Woldorff, M. G., Fletcher, E. M., & Mangun, G. R. (2001). Dissociating top-down attentional control from selective perception and action.Neuropsychologia, 39, 1277-1291.
• Hulme, O. J., Friston, K. F., & Zeki, S. (2009). Neural correlates of stimulus reportability.Journal of Cognitive Neuroscience, 21, 1602-1610.
• Janson, J., & Kranczioch, C. (2011). Good vibrations, bad vibrations: Oscillatory brain activity in the attentional blink.Advances in Cognitive Psychology, 7, 92-107.
• Jaśkowski, P., Skalska, B., & Verleger, R. (2003). How the self controls its "automatic pilot" when processing subliminal information.Journal of Cognitive Neuroscience, 15, 911-920.
• Karnath, H. O., Ferber, S., & Himmelbach, M. (2001). Spatial awareness is a function of the temporal not the posterior parietal lobe.Nature, 411, 950-953.
• Karnath, H. O., Fruhmann Berger, M., Kuker, W., & Rorden, C. (2004). The anatomy of spatial neglect based on voxelwise statistical analysis: A study of 140 patients.Cerebral Cortex, 14, 1164-1172.
• Kessler, K., Schmitz, F., Gross, J., Hommel, B., Shapiro, K., & Schnitzler, A. (2005). Target consolidation under high temporal processing demands as revealed by MEG.NeuroImage, 26, 1030-1041.
• Khalid, S., König, P., & Ansorge, U. (in press). Sensitivity of different measures of the visibility of masked primes: Influences of prime-response and prime-target relations.Consciousness & Cognition.
• Kiefer, M. (2002). The N400 is modulated by unconsciously perceived masked words: Further evidence for an automatic spreading activation account of N400 priming effects.Cognitive Brain Research, 13, 27-39.
• Kiefer, M. (2007). Top-down modulation of unconscious "automatic" processes: A gating framework.Advances in Cognitive Psychology, 3, 289-306.
• Kiefer, M., Adams, S., & Zovko, M. (2012). Attentional sensitization of unconscious visual processing: Top-down influences on masked priming.Advances in Cognitive Psychology.
• Kiefer, M., & Brendel, D. (2006). Attentional modulation of unconscious "automatic" processes: Evidence from event-related potentials in a masked priming paradigm.Journal of Cognitive Neuroscience, 18, 184-198.
• Kiefer, M., & Martens, U. (2010). Attentional sensitization of unconscious cognition: Task sets modulate subsequent masked semantic priming.Journal of Experimental Psychology: General, 139, 464-489.
• Kiefer, M., & Spitzer, M. (2000). Time course of conscious and unconscious semantic brain activation.NeuroReport, 11, 2401-2407.
• Kiesel, A., Kunde, W., & Hoffmann, J. (2007). Mechanisms of subliminal response priming.Advances in Cognitive Psychology, 3, 307-315.
• Kiesel, A., Kunde, W., Pohl, C., Berner, M. P., & Hoffmann, J. (2009). Playing chess unconsciously.Journal of Experimental Psychology: Learning, Memory, and Cognition, 35, 292-298.
• Klotz, W., & Neumann, O. (1999). Motor activation without conscious discrimination in metacontrast masking.Journal of Experimental Psychology: Human Perception and Performance, 25, 976-992.
• Koch, C., & Tsuchiya, N. (2007). Attention and consciousness: Two distinct brain processes.Trends in Cognitive Sciences, 11, 16-22.
• Kunde, W. (2003). Sequential modulations of stimulus-response correspondence effects depend on awareness of response conflict.Psychonomic Bulletin & Review, 10, 198-205.
• Kunde, W., Kiesel, A., & Hoffmann, J. (2003). Conscious control over the content of unconscious cognition.Cognition, 88, 223-242.
• Kunde, W., Reuss, H., & Kiesel, A. (2012). Consciousness and cognitive control.Advances in Cognitive Psychology.
• Lamme, V. A. (2003). Why visual attention and awareness are different.Trends in Cognitive Sciences, 7, 12-18.
• Leopold, D. A., & Logothetis, N. K. (1996). Activity changes in early visual cortex reflect monkeys' percepts during binocular rivalry.Nature, 379, 549-553.
• Luck, S. J., Vogel, E. K., & Shapiro, K. L. (1996). Word meanings can be accessed but not reported during the attentional blink.Nature, 383, 616-618.
• Mack, A., & Rock, I. (1998).Inattentional blindness.Cambridge, MA: MIT Press.
• Macknik, S. L., & Martinez-Conde, S. (2007). The role of feedback in visual masking and visual processing.Advances in Cognitive Psychology, 3, 125-152.
• Martens, U., Ansorge, U., & Kiefer, M. (2011). Controlling the unconscious: Attentional task sets modulate subliminal semantic and visuo-motor processes differentially.Psychological Science, 22, 282-291.
• Martens, U., & Kiefer, M. (2009). Specifying attentional top-down influences on subsequent unconscious semantic processing.Advances in Cognitive Psychology, 5, 56-68.
• Martinez-Trujillo, J. C., & Treue, S. (2004). Feature-based attention increases the selectivity o population responses in primate visual cortex.Current Biology, 14, 744-751.
• Mattler, U. (2003). Priming of mental operations by masked stimuli.Perception & Psychophysics, 65, 167-187.
• Mattler, U. (2005). Inhibition and decay of motor and non-motor priming.Perception & Psychophysics, 67, 285-300.
• Mattler, U. (2006). On the locus of priming and inverse priming effects.Perception & Psychophysics, 68, 975-991.
• Mattler, U., & Fendrich, R. (2010). Consciousness mediated by neural transition states: How invisibly rapid motions can become visible.Consciousness & Cognition, 19, 172-185.
• Mendola, J. D., Dale, A. M., Fischl, B., Liu, A. K., & Tootell, R. B. (1999). The representation of illusory and real contours in human cortical visual areas revealed by functional magnetic resonance imaging.The Journal of Neuroscience, 19, 8560-8572.
• Merikle, P. M., & Daneman, M. (1998). Psychological investigations of unconscious perception.Journal of Consciousness Studies, 5, 5-18.
• Merikle, P. M., Joordens, S., & Stolz, J. A. (1995). Measuring the relative magnitude of unconscious influences.Consciousness and Cognition, 4, 422-439.
• Michael, L., Kiefer, M., & Niedeggen, M. (2012). The influence of distracter and target features on distracter induced blindness.Advances in Cognitive Psychology.
• Middleton, F. A., & Strick, P. L. (2000). Basal ganglia and cerebellar loops: Motor and cognitive circuits.Brain Research Reviews, 31, 236-250.
• Naccache, L., Blandin, E., & Dehaene, S. (2002). Unconscious masked priming depends on temporal attention.Psychological Science, 13, 416-424.
• Nagel, T. (1974). What is it like to be a bat? ThePhilosophical Review, LXXXIII, 4, 435-450.
• Neely, J. H. (1991). Semantic priming effects in visual word recognition: A selective review of current findings and theories. In D. Besner & G. W. Humphreys (Eds.),Basic progresses in reading: Visual word recognition(pp. 264-333). Hillsdale, NJ: Lawrence Erlbaum Associates.
• Neumann, O. (1990). Direct parameter specification and the concept of perception.Psychological Research, 52, 207-215.
• Neumann, O., & Klotz, W. (1994). Motor responses to nonreportable, masked stimuli: Where is the limit of direct parameter specification? In C. Umiltá & M. Moscovitch (Eds.),Attention and performance 15: Conscious and nonconscious information processing.(pp. 123-150). Cambridge, MA: The MIT Press.
• Ng, J., Chan, H. Y., & Schlaghecken, F. (2012). Dissociating effects of subclinical anxiety and depression on cognitive control.Advances in Cognitive Psychology.
• Niedeggen, M., Hesselmann, G., Sahraie, A., Milders, M., & Blakemore, C. (2004). Probing the prerequisites for motion blindness.Journal of Cognitive Neuroscience, 16, 584-597.
• Niedeggen, M., Sahraie, A., Hesselmann, G., Milders, M., & Blakemore, C. (2002). Is experimental motion blindness due to sensory suppression? An ERP approach.Cognitive Brain Research, 13, 241-247.
• O'Reilly, R. C., & Frank, M. J. (2006). Making working memory work: A computational model of learning in the prefrontal cortex and basal ganglia.Neural Computation, 18, 283-328.
• Pessoa, L., Kastner, S., & Ungerleider, L. G. (2003). Neuroimaging studies of attention: From modulation of sensory processing to top-down control.The Journal of Neuroscience, 23, 3990-3998.
• Pins, D., & Ffytche, D. (2003). The neural correlates of conscious vision.Cerebral Cortex, 13, 461-474.
• Posner, M. I., & Driver, J. (1992). The neurobiology of selective attention.Current Opinion in Neurobiology, 2, 165-169.
• Posner, M. I., & Rothbart, M. K. (1998). Attention, self-regulation, and consciousness.Philosophical Transactions of the Royal Society London B, Biological Sciences, 353, 1915-1927.
• Proctor, R. W., & Vu, K.-P. L. (2002). Mixing incompatibly mapped location-irrelevant trials and location-relevant trials: Influence of stimulus mode on spatial compatibility effects.Memory & Cognition, 30, 281-293.
• Rees, G., Russell, C., Frith, C. D., & Driver, J. (1999). Inattentional blindness versus inattentional amnesia for fixated but ignored words.Science, 286, 2504-2507.
• Rensink, R. A., O'Regan, J. K., & Clark, J. J. (1997). To see or not to see: The need for attention to perceive changes in scenes.Psychological Science, 8, 368-373.
• Reuss, H., Pohl, C., Kiesel, A., & Kunde, W. (2011). Follow the sign! Top-down contingent attentional capture of masked arrow cues.Advances in Cognitive Psychology, 7, 82-91.
• Reynolds, J. H., Chelazzi, L., & Desimone, R. (1999). Competitive mechanisms subserve attention in macaque areas V2 and V4.The Journal of Neuroscience, 19, 1736-1753.
• Sahraie, A., Milders, M., & Niedeggen, M. (2001). Attention induced motion blindness.Vision Research, 41, 1613-1617.
• Scharlau, I., & Ansorge, U. (2003). Direct parameter specification of an attention shift: Evidence from perceptual latency priming.Vision Research, 43, 1351-1363.
• Scharlau, I., Ansorge, U., & Breitmeyer, B. G. (2006). Trends and styles in visual masking.Advances in Cognitive Psychology, 2, 1-5.
• Scharlau, I., & Horstmann, G. (2006). Perceptual latency priming and illusory linemotion: Facilitation by gradients of attention.Advances in Cognitive Psychology, 2, 87-97.
• Schmidt, T. (2002). The finger in flight: Real-time motor control by visually masked color stimuli.Psychological Science, 13, 112-118.
• Schmidt, T. (2007). Measuring unconscious cognition: Beyond the zero-awareness criterion.Advances in Cognitive Psychology, 3, 275-287.
• Schmidt, F., Haberkamp, A., & Schmidt, T. (2011). Dos and don'ts in response priming research.Advances in Cognitive Psychology, 120-131.
• Schmidt, T., & Vorberg, D. (2006). Criteria for unconscious cognition: Three types of dissociation.Perception & Psychophysics, 68, 489-504.
• Serences, J. T., Saproo, S., Scolari, M., Ho, T., & Muftuler, L. T. (2009). Estimating the influence of attention on population codes in human visual cortex using voxel-based tuning functions.NeuroImage, 44, 223-231.
• Shapiro, K. L., Arnell, K. M., & Raymond, J. E. (1997). The attentional blink.Trends in Cognitive Sciences, 8, 291-296.
• Singer, W. (1999). Neuronal synchrony: A versatile code for the definition of relations?Neuron, 24, 49-65.
• Śmigasiewicz, K., Shalgi, S., Hsieh, S., Möller, F., Jaffe, S., Chang, C. C., & Verleger, R. (2010). Left visual-field advantage in the dual-stream RSVP task and reading-direction: A study in three nations.Neuropsychologia, 48, 2852-2860.
• Song, J.-H., Rowland, J., McPeek, R. M., & Wade, A. R. (2011). Attentional modulation of fMRI responses in human V1 is consistent with distinct spatial maps for chomatically defined orientation and contrast.The Journal of Neusocience, 31, 12900-12905
• Tomita, H., Ohbayashi, M., Nakahara, K., Hasegawa, I., & Miyashita, Y. (1999). Top-down signal from prefrontal cortex in executive control of memory retrieval.Nature, 401, 699-703.
• Trapp, S., Schroll, H., & Hamker, F. (2012). Open and closed loops: A computational approach to attention and consciousness.Advances in Cognitive Psychology.
• Trevethan, C. T., Urquhart, J., Ward, R., Gentleman, D., & Sahraie, A. (2012). Evidence for perceptual learning with repeated stimulation after partial and total cortical blindness.Advances in Cognitive Psychology.
• Van Boxtel, J. J. A., Tsuchiya, N., & Koch, C. (2010). Consciousness and attention: On sufficiency and necessity.Frontiers in Psychology, 1, 217.
• Verleger, R., Jaśkowski, P., Aydemir, A., van der Lubbe, R. H., & Groen, M. (2004). Qualitative differences between conscious and nonconscious processing? On inverse priming induced by masked arrows.Journal of Experimental Psychology: General, 133, 494-515.
• Verleger, R., Möller, F., Kuniecki, M., Śmigasiewicz, K., Groppa, S., & Siebner, H. R. (2010). The left visual-field advantage in rapid visual presentation is amplified rather than reduced by posterior-parietal rTMS.Experimental Brain Research, 203, 355-365.
• Verleger, R., Sprenger, A., Gebauer, S., Fritzmannova, M., Friedrich, M., Kraft, S., & Jaśkowski, P. (2009). On why left events are the right ones: Neural mechanisms underlying the left-hemifield advantage in rapid serial visual presentation.Journal of Cognitive Neuroscience, 21, 474-488.
• Verleger, R., Żurawska vel Grajewska, B., & Jaśkowski, P. (2012). Time-course of hemispheric preference for processing contra-lateral relevant shapes: P1pc, N1pc, N2pc, N3pc.Advances in Cognitive Psychology.
• Vitay, J., & Hamker, F. H. (2010). A computational model of the influence of basal ganglia on memory retrieval in rewarded visual memory tasks.Frontiers in Computational Neuroscience, 4, 13.
• Vorberg, D., Mattler, U., Heinecke, A., Schmidt, T., & Schwarzbach, J. (2003). Different time courses for visual perception and action priming.Proceedings of the National Academy of Sciences USA, 100, 6275-6280.
• Vorberg, D., Mattler, U., Heinecke, A., Schmidt, T., & Schwarzbach, J. (2004). Invariant time-course of priming with and without awareness. In C. Kaernbach, E. Schröger, & H. Müller (Eds.),Psychophysics beyond sensation: Laws and invariants of human cognition(pp. 271-288). Mahwah, NJ: Erlbaum.
• Wolbers, T., Schoell, E. D., Verleger, R., Kraft, S., McNamara, A., Jaśkowski, P., & Büchel, C. (2006). Changes in connectivity profiles as a mechanism for strategic control over interfering subliminal information.Cerebral Cortex, 16, 857-864.
• Womelsdorf, T., & Fries, P. (2007). The role of neuronal synchronization in selective attention.Current Opinion in Neurobiology, 17, 154-160.
• Zeki, S. (2003). The disunity of consciousness.Trends in Cognitive Sciences, 7, 214-218.
• Zhang, D., Zhou, X., & Martens, S. (2009). The impact of negative attentional set upon target processing in RSVP: An ERP study.Neuropsychologia, 47, 2604-2614.
• Zirnsak, M., Beuth, F., & Hamker, F. H. (in press). Split of spatial attention as predicted by a systems-level model of visual attention.European Journal of Neuroscience.

Identifiers

DOI

10.2478/v10053-008-0090-4