Purpose of the study: To answer the two existing controversies regarding attention and consciousness as brain processes. 1) Can one be aware of objects or events without attending to it? 2) Can one attend to objects or events without being aware of it? And also how top-down attention and awareness have opposing functions.

Methodology: This article is a systematic review of the relationship between visual attention and awareness. An extensive elaborate study on concepts relating to attention and consciousness dissociation has been done. In this article we also narrow it down to experimental design that requires independent manipulation of each. Which include top-down attention and awareness aspect of consciousness?

Main Findings: Many researches have been put forward supporting the independent nature of attention from awareness using sophisticated experimental and physiological shreds of evidence. On the other hand, some researches still stick to the contemporary common-sense notion of no awareness no attention. Our evaluation suggests an independent nature of attention and awareness.

Application: This article intends to give a clear perspective of the ongoing debate on the relationship between attention and consciousness. Simplification of both umbrella terms will give basis for building more empirical evidence.

Novelty: Further, this article put forward studies on both sides of debate aiming to bridge the gap to get a conclusive outlook in the future.


  1. Baars, B. J. (1997). Some Essential Differences between Consciousness and Attention, Perception, and Working Memory. Consciousness and Cognition, 371(6), 363–371. https://doi.org/10.1006/ccog.1997.0307
  2. Baars, B. J. (1999). Attention versus consciousness in the visual brain: differences in conception, phenomenology, behaviour, neuroanatomy, and physiology. The Journal of General Psychology, 126(3), 224–33. Retrieved from http://www.ncbi.nlm.nih.gov/pubmed/10443028. https://doi.org/10.1080/00221309909595364
  3. Block, N. (1996). How can we find the neural correlate of consciousness?. Trends in neurosciences, 19(11), 456-459. https://doi.org/10.1016/S0166-2236(96)20049-9
  4. Braun, J., &Julesz, B. (1998). Withdrawing attention at little or no cost: Detection and discrimination tasks. Perception & Psychophysics, 60(1), 1–23. https://doi.org/10.3758/BF03211915
  5. De Brigard, F., &Prinz, J. (2010). Attention and consciousness. Wiley Interdisciplinary Reviews: Cognitive Science, 1(1), 51-59. https://doi.org/10.1002/wcs.27
  6. De Brigard, F. (2010). Consciousness, Attention and Commonsense. Journal of Consciousness Studies, 17(9–10), 189–201.
  7. Dehaene, S., &Naccache, L. (2001). Towards a cognitive neuroscience of consciousness : basic evidence and a workspace framework. Cognition, 79(3), 1–37. https://doi.org/10.1016/S0010-0277(00)00123-2
  8. Chica, A. B., & Bartolomeo, P. (2012). Attentional routes to conscious perception. Frontiers in Psychology, 3(January), 1–12. https://doi.org/10.3389/fpsyg.2012.00001
  9. Cohen, M. A., Alvarez, G. A., & Nakayama, K. (2011). Natural-Scene Perception Requires Attention. Psychological Science, 22(9), 1165–1172. https://doi.org/10.1177/0956797611419168
  10. Cohen, M. A., Cavanagh, P., Chun, M. M., & Nakayama, K. (2012). The attentional requirements of consciousness. Trends in Cognitive Sciences, 16(8), 411–417. https://doi.org/10.1016/j.tics.2012.06.013
  11. Eimer, M., &Grubert, A. (2014). Report Spatial Attention Can Be Allocated Rapidly and in Parallel to New Visual Objects. Current Biology, 24(2), 193–198. https://doi.org/10.1016/j.cub.2013.12.001
  12. Eimer, M., &Grubert, A. (2015). A dissociation between selective attention and conscious awareness in the representation of temporal order information. Consciousness and Cognition, 35(4), 274–281. https://doi.org/10.1016/j.concog.2015.01.001
  13. Elliott, J. C., Baird, B., &Giesbrecht, B. (2016). Consciousness isn’t all-or-none: Evidence for partial awareness during the attentional blink. Consciousness and Cognition, 40, 79–85. https://doi.org/10.1016/j.concog.2015.12.003
  14. Fei-Fei, L., Koch, C., &Perona, P. (2005). Why does natural scene categorization require little attention ? Exploring attentional requirements for natural and synthetic stimuli. Visual Cognition, 12(6), 893–924. https://doi.org/10.1080/13506280444000571
  15. Grubert, A., Grubert, A., &Eimer, M. (2016). Rapid Parallel Attentional Target Selection in Single-Color and Multiple-Color Visual Search Rapid Parallel Attentional Target Selection in Single-Color and Multiple-Color Visual Search. Journal of Experimental Psychology Human Perception & Performance, 41(1), 86–101. http://doi.org/10.1037/xhp0000019
  16. Houtkamp, R., & Braun, J. (2010). Cortical response to task-relevant stimuli presented outside the primary focus of attention. Journal of cognitive neuroscience, 22(9), 1980-1992. https://doi.org/10.1162/jocn.2009.21327
  17. Iwasaki, S. (1993). Spatial attention and two modes of visual consciousness. Cognition, 49(3), 211-233. https://doi.org/10.1016/0010-0277(93)90005-G
  18. James, W. (1890). The principles of psychology, Vol. 2. NY, US: Henry Holt and Company. https://doi.org/10.1037/10538-000
  19. Jensen, M. S., Yao, R., Street, W. N., & Simons, D. J. (2011). Change blindness and inattentional blindness. Wiley Interdisciplinary Reviews: Cognitive Science, 2(5), 529-546. https://doi.org/10.1002/wcs.130
  20. Jennings, C. D. (2015). Consciousness without Attention. Journal of the American Philosophical Association, 1(2), 276–295. https://doi.org/10.1017/apa.2014.14
  21. Kentridge, R. W., Heywood, C. A., &Weiskrantz, L. (1999). Attention without awareness in blindsight. Proceedings of the Royal Society of London B: Biological Sciences, 266(1430), 1805–1811. https://doi.org/10.1098/rspb.1999.0850
  22. Koch, C. (2013). Chapter 51 – The Neuroscience of Consciousness. In Fundamental Neuroscience (pp. 1091–1103). https://doi.org/10.1016/B978-0-12-385870-2.00051-2
  23. Koch, C., & Tsuchiya, N. (2006). Attention and consciousness : Two distinct brain processes, 11(1). https://doi.org/10.1016/j.tics.2006.10.012
  24. Lamme, V. A. F. (2003). Why visual attention and awareness are different. Trends in Cognitive Sciences, 7(1), 12–18. https://doi.org/10.1016/S1364-6613(02)00013-X
  25. Lamme, V. A. F. (2004). Separate neural definitions of visual consciousness and visual attention ; a case for phenomenal awareness. Neural Networks, 17(5), 861–872. https://doi.org/10.1016/j.neunet.2004.02.005
  26. Li, F. F., Vanrullen, R., Koch, C., &Perona, P. (2002). Rapid natural scene categorization in the near absence of attention. Proceedings of the National Academy of Sciences, 99(14), 9596–9601. https://doi.org/10.1073/pnas.092277599
  27. Lu, S., Cai, Y., Shen, M., Zhou, Y., & Han, S. (2012). Alerting and orienting of attention without visual awareness. Consciousness and Cognition, 21(2), 928–938. https://doi.org/10.1016/j.concog.2012.03.012
  28. Mack, A., & Rock, I. (1999). Inattentional blindness. Psyche, 5(3). https://doi.org/10.7551/mitpress/3707.001.0001
  29. Mack, A. (2003). Inattentional Blindness: Looking Without Seeing. Current Directions in Psychological Science, 12(5), 180–184. https://doi.org/10.1111/1467-8721.01256
  30. Marchetti, G. (2012). Against the view that consciousness and attention are fully dissociable. Frontiers in psychology, 3, 36. https://doi.org/10.3389/fpsyg.2012.00036
  31. Marchetti, G. (2018). Consciousness : a unique way of processing information. Cognitive Processing, 19(3), 435–464. h https://doi.org/10.1007/s10339-018-0855-8
  32. Merikle, P. M., & Joordens, S. (1997). Parallels between Perception without Attention and Perception without Awareness. Consciousness and Cognition, 236(6), 219–236. https://doi.org/10.1006/ccog.1997.0310
  33. Mole, C. (2008). Attention and Consciousness. Journal of Consciousness Studies, 15(4), 86–104.
  34. Mudrik, L., Faivre, N., & Koch, C. (2014). Information integration without awareness. Trends in Cognitive Sciences, 18(9), 488–496. https://doi.org/10.1016/j.tics.2014.04.009
  35. Overgaard, M. (2017). The Status and Future of Consciousness Research, 8(October), 8–11. https://doi.org/10.3389/fpsyg.2017.01719
  36. Posner, M. I. (1994). Attention: the mechanisms of consciousness. Proceedings of the National Academy of Sciences of the United States of America, 91(August), 7398–7403. https://doi.org/10.1073/pnas.91.16.7398
  37. Posner, M. I. (2008). Attentional Networks and the Semantics of Consciousness 1 Michael I. Posner University of Oregon, 1–7.
  38. Posner, M. (2012). Attentional networks and consciousness. Frontiers in psychology, 3, 64. https://doi.org/10.3389/fpsyg.2012.00064
  39. Phillips, I. (2018). The methodological puzzle of phenomenal consciousness. Philosophical Transactions of the Royal Society B: Biological Sciences, 373(1755), 20170347. https://doi.org/10.1098/rstb.2017.0347
  40. Reddy, L., Moradi, F., & Koch, C. (2007). Top-down biases win against focal attention in the fusiform face area. NeuroImage, 38(4), 730–739. https://doi.org/10.1016/j.neuroimage.2007.08.006
  41. Reddy, L., Reddy, L., & Koch, C. (2006). Face identification in the near-absence of focal attention, 46, 2336–2343. https://doi.org/10.1016/j.visres.2006.01.020
  42. Regan, J. K. O., & Noë, A. (2001). A sensorimotor account of vision and visual consciousness. Behavioural and Brain Sciences, 24(3), 939–1031. https://doi.org/10.1017/S0140525X01000115
  43. Rensink, R. A., & Columbia, B. (2009). Attention : Change Blindness and InattentionalBlindnes s, 1–13. https://doi.org/10.1016/B978-012373873-8.00006-2
  44. Shapiro, K. L., Raymond, J. E., & Arnell, K. M. (1997). The attentional blink. Trends in cognitive sciences, 1(8), 291-296. https://doi.org/10.1016/S1364-6613(97)01094-2
  45. Snyder, J. S., Gregg, M. K., Weintraub, D. M., & Alain, C. (2012). Attention, awareness, and the perception of auditory scenes. Frontiers in Integrative Neuroscience, 3(2), 1–17. https://doi.org/10.3389/fpsyg.2012.00015
  46. Taylor, J. G., & Fragopanagos, N. (2007). Resolving some confusions over attention and consciousness. Neural Networks, 20(9), 993-1003. https://doi.org/10.1016/j.neunet.2007.09.007
  47. Tallon-Baudry, C. (2012). On the neural mechanisms subserving consciousness and attention. Frontiers in Psychology. https://doi.org/10.3389/fpsyg.2011.00397
  48. Tsuchiya, N., & Koch, C. (2009). The relationship between consciousness and attention. The Neurology of Consciousness: Cognitive neuroscience and Neuropathology (pp. 63–78). https://doi.org/10.1016/B978-0-12-374168-4.00006-X
  49. VanBoxtel, J. J., Tsuchiya, N., & Koch, C. (2010). Consciousness and attention: on sufficiency and necessity. Frontiers in Psychology, 1, 217. https://doi.org/10.3389/fpsyg.2010.00217
  50. VanBoxtel, J. J., Tsuchiya, N., & Koch, C. (2010). Opposing effects of attention and consciousness on afterimages. Proceedings of the National Academy of Sciences, 107(19), 8883-8888. https://doi.org/10.1073/pnas.0913292107
  51. Van den Bussche, E., Hughes, G., Van Humbeeck, N., &Reynvoet, B. (2010). The relation between consciousness and attention: An empirical study using the priming paradigm. Consciousness and cognition, 19(1), 86-97. https://doi.org/10.1016/j.concog.2009.12.019
  52. Vanrullen, R., Reddy, L., & Koch, C. (1973). Visual Search and Dual Tasks Reveal Two Distinct Attentional Resources. Journal of Cognitive Neuroscience, 16(1), 4–14. https://doi.org/10.1162/089892904322755502
  53. Webb, T. W., Igelström, K. M., Schurger, A., & Graziano, M. S. A. (2016). Cortical networks involved in visual awareness independent of visual attention, 113(48), 13923–13928. https://doi.org/10.1073/pnas.1611505113