Review of Philosophy and Psychology

, Volume 7, Issue 4, pp 701–714 | Cite as

Do Synesthetic Colors Grab Attention in Visual Search?

Article

Abstract

Recent research on synesthesia has focused on how the condition may depend on selective attention, but there is a lack of consensus on whether selective attention is required to bind colors to their grapheme inducers. In the present study, we used a novel change detection paradigm to examine whether synesthetic colors guide the subject’s attention to the location of the inducer or whether selective attention is required to act as a unique feature during visual search. If synesthetic experiences are elicited by inducers (e.g., digits) without selective attention, then a target that is distinct from the distractors by virtue of its unique synesthetic color should capture attention. This should lead to efficiency in the search that is analogous to the efficiency in searches involving unique display colors (e.g., a display of red digits among black). If, however, an inducer does not elicit a synesthetic color until the subject selectively attends to it, then the search should be as inefficient as for control subjects. We found that, not only does synesthesia not provide an advantage in complicated visual search tasks, it offers a slight disadvantage, supporting the re-entrant processing hypothesis about the mechanism underlying synesthesia.

References

  1. Armel, K.C., and V.S. Ramachandran. 1999. Acquired synesthesia in retinitis pigmentosa. Neurocase 5: 293–296.CrossRefGoogle Scholar
  2. Bargary, G., and K.J. Mitchell. 2008. Synaesthesia and cortical connectivity. Trends in Neuroscience 31(7):335–342.Google Scholar
  3. Baron-Cohen, S., J. Harrison, L.H. Goldstein, and M. Wyke. 1993. Coloured speech perception: Is synaesthesia what happens when modularity breaks down? Perception 22: 419–426.CrossRefGoogle Scholar
  4. Beck, J. 1966. Effect of orientation and of shape similarity on perceptual grouping. Perception & Psychophysics 1: 300–302.CrossRefGoogle Scholar
  5. Brogaard, B. 2012. Color synesthesia. In Cognition & language, encyclopedia of color science and technology, ed. K. A. Jameson. Springer, forthcoming.Google Scholar
  6. Cytowic, R. E, and D. M. Eagleman. 2009. Wednesday is indigo blue. MIT Press.Google Scholar
  7. Dixon, M.J., and D. Smilek. 2005. The importance of individual differences in grapheme-color synesthesia. Neuron 45: 821–823.CrossRefGoogle Scholar
  8. Dixon, M.J., D. Smilek, and P.M. Merikle. 2004. Not all synaesthetes are created equal: Projector versus associator synaesthetes. Cognitive, Affective, & Behavioral Neuroscience 4: 335–343.CrossRefGoogle Scholar
  9. Eagleman, D.M., A.D. Kagan, S.S. Nelson, D. Sagaram, and A.K. Sarma. 2007. A standardized test battery for the study of Synesthesia. Journal of Neuroscience Methods 159: 139–145.CrossRefGoogle Scholar
  10. Edquist, J., A.N. Rich, C. Brinkman, and J.B. Mattingley. 2006. Do synaesthetic colours act as unique features in a visual search? Cortex 42: 222–231.CrossRefGoogle Scholar
  11. Elias, L.J., D.M. Saucier, C. Hardie, and G.E. Sarty. 2003. Dissociating semantic and perceptual components of synaesthesia: Behavioural and functional neuroanatomical investigations. Cognitive Brain Research 16: 232–237.CrossRefGoogle Scholar
  12. Gaschler-Markefski, B., G.R. Szycik, C. Sinke, J. Neufeld, U. Schneider, F. Baumgart, O. Dierks, U. Stiegemann, H. Scheich, H.M. Emrich, and M. Zedler. 2011. Anomalous auditory cortex activations in colored hearing synaesthetes: An fMRI-study. Seeing and Perceiving 24(4): 391–405.CrossRefGoogle Scholar
  13. Gheri, C., S. Chopping, and M.J. Morgan. 2008. Synaesthetic colours do not camouflage form in visual search. Proceedings of the Royal Society B 275: 841–846.CrossRefGoogle Scholar
  14. Grossenbacher, P.G. 1997. Perception and sensory information in synaesthetic experience. In Synaesthesia: Classic and contemporary readings, ed. S. Baron-Cohen and J.E. Harrison, 148–172. Malden: Blackwell Publishers.Google Scholar
  15. Grossenbacher, P.G., and C.T. Lovelace. 2001. Mechanisms of synesthesia: Cognitive and physiological constraints. Trends in Cognitive Science 5: 36–41.CrossRefGoogle Scholar
  16. Hubbard, E.M., and V.S. Ramachandran. 2005. Neurocognitive mechanisms of synesthesia. Neuron 48: 509–520.CrossRefGoogle Scholar
  17. Hubbard, E.M., A.C. Arman, V.S. Ramachandran, and G.M. Boynton. 2005a. Individual differences among grapheme-color synesthetes: Brain-behavior correlations. Neuron 45(6): 975–985.CrossRefGoogle Scholar
  18. Hubbard, E. M., S. Manohar and V. S. Ramachandran. 2005b. Contrast affects the strength of synesthetic colors. Cortex, 184–194.Google Scholar
  19. Kim, C.Y., R. Blake, and T. Palmeri. 2006. Perceptual interaction between real and synesthetic colours. Cortex 46: 195–203.CrossRefGoogle Scholar
  20. Laeng, B. 2009. Searching through synaesthetic colors. Attention, Perception & Psychophysics 71(7): 1461–1467.CrossRefGoogle Scholar
  21. Laeng, B., F. Svartdal, and H. Oelmann. 2004. Does color synesthesia pose a paradox for early-selection theories of attention? Psychological Science 15: 277–281.CrossRefGoogle Scholar
  22. Mattingley, J.B., and A.N. Rich. 2004. Behavioural and brain correlates of multisensory experience in synaesthesia. In Handbook of multisensory integration, ed. G. Calvert, C. Spence, and B. Stein. Cambridge: MIT Press.Google Scholar
  23. Mattingley, J.B., A.N. Rich, G. Yelland, and J.L. Bradshaw. 2001. Unconscious priming eliminates automatic binding of colour and alphanumeric form in synaesthesia. Nature 410: 580–582.CrossRefGoogle Scholar
  24. Meier, B., and N. Rothen. 2009. Training grapheme-colour associations produces a synaesthetic stroop effect, but not a conditioned synaesthetic response. Neuropsychologia 47(4): 1208–1211.CrossRefGoogle Scholar
  25. Myles, K.M., M.J. Dixon, D. Smilek, and P.M. Merikle. 2003. Seeing double: The role of meaning in alphanumeric-colour synaesthesia. Brain and Cognition 53: 342–345.CrossRefGoogle Scholar
  26. Neufeld, J., C. Sinke, M. Zedler, W. Dillo, H.M. Emrich, S. Bleich, and G.R. Szycik. 2012. Disinhibited feedback as a cause of synesthesia: Evidence from a functional connectivity study on auditory-visual synesthetes. Neuropsychologia 50(7): 1471–1477.CrossRefGoogle Scholar
  27. Nunn, J.A., L.J. Gregory, M. Brammer, S.C. Williams, D.M. Parslow, M.J. Morgan, R.G. Morris, E.T. Bullmore, S. Baron-Cohen, and J.A. Gray. 2002. Functional magnetic resonance imaging of synesthesia: Activation of V4/V8 by spoken words. Nature Neuroscience 5: 371–375.CrossRefGoogle Scholar
  28. Odgaard, E.C., J.H. Flowers, and H.L. Bradman. 1999. An investigation of the cognitive and perceptual dynamics of a colour-digit synaesthete. Perception 28: 651–664.CrossRefGoogle Scholar
  29. Palmeri, T.J., R. Blake, R. Marois, M.A. Flanery, and W. Whetsell Jr. 2002. The perceptual reality of synesthetic colors. Proceedings of the National Academy of Sciences of the United States of America 99: 4127–4131.CrossRefGoogle Scholar
  30. Ramachandran, V.S., and E.M. Hubbard. 2001a. Psychophysical investigations into the neural basis of synaesthesia. Proceedings of the Royal Society B: Biological Sciences 268: 979–983.CrossRefGoogle Scholar
  31. Ramachandran, V.S., and E.M. Hubbard. 2001b. Synaesthesia: A window into perception, thought and language. Journal of Consciousness Studies 8(12): 3–34.Google Scholar
  32. Ramachandran, V.S., and E.M. Hubbard. 2003. The phenomenology of synaesthesia. Journal of Consciousness Studies 10: 49–57.Google Scholar
  33. Rich, A.N., and K.I. Karstoft. 2013. Exploring the benefit of synaesthetic colours: Testing for “pop-out” in individuals with grapheme-colour synaesthesia. Cognitive Neuropsychology. doi:10.1080/02643294.2013.805686.Google Scholar
  34. Rich, A.N., and J.B. Mattingley. 2002. Anomalous perception in synaesthesia: A cognitive neuroscience perspective. Nature Reviews Neuroscience 3: 43–52.CrossRefGoogle Scholar
  35. Rich, A.N., and J.B. Mattingley. 2003. The effects of stimulus competition and voluntary attention on colour-graphemic synaesthesia. NeuroReport 14: 1793–1798.CrossRefGoogle Scholar
  36. Rich, A.N., and J.B. Mattingley. 2010. Out of sight, out of mind: The attentional blink can eliminate synaesthetic colours. Cognition 114(3): 320–328. doi:10.1016/j.cognition.2009.10.003.CrossRefGoogle Scholar
  37. Rich, A.N., J.L. Bradshaw, and J.B. Mattingley. 2005. A systematic, large-scale study of synaesthesia: implications for the role of early experience in lexical-colour associations. Cognition 98: 53–84.Google Scholar
  38. Robertson, L.C. 2003. Binding, spatial attention and perceptual awareness. Nature Reviews Neuroscience 4: 93–102.CrossRefGoogle Scholar
  39. Rouw, R., and S. Scholte. 2007. Increased structural connectivity in grapheme-color synesthesia. Nature Neuroscience 10: 792–797.Google Scholar
  40. Sagiv, N., J. Heer, and L. Robertson. 2006. Does binding of synesthetic color to the evoking grapheme require attention? Cortex 42(2): 232–242.CrossRefGoogle Scholar
  41. Simner, J., J. Ward, M. Lanz, A. Jansari, K. Noonan, L. Glover, and D.A. Oakley. 2005. Non-random associations of graphemes to colours in synaesthetic and non-synaesthetic populations. Cognitive Neuropsychology 22(8): 1069.CrossRefGoogle Scholar
  42. Smilek, D., M.J. Dixon, C. Cudahy, and P.M. Merikle. 2001. Synaesthetic photisms influence visual perception. Journal of Cognitive Neuroscience 13: 930–936.CrossRefGoogle Scholar
  43. Smilek, D., M.J. Dixon, and P.M. Merikle. 2003. Synaesthetic photisms guide attention. Brain and Cognition 53: 364–367.CrossRefGoogle Scholar
  44. Stroop, J.R. 1935. Studies of interference in serial verbal reactions. Journal of Experimental Psychology 18(6): 643–662.CrossRefGoogle Scholar
  45. Treisman, A. 1982. Perceptual grouping and attention in visual search for features and for objects. Journal of Experimental Psychology: Human Perception and Performance 8(2): 194–214.Google Scholar
  46. Treisman, A., and G. Gelade. 1980. A feature integration theory of attention. Cognitive Psychology 12: 97–136.CrossRefGoogle Scholar
  47. Ward, J. 2013. Synesthesia. Annual Review of Psychology 64: 49–75.Google Scholar
  48. Ward, J., R. Li, S. Salih, and N. Sagiv. 2007. Varieties of grapheme-colour synaesthesia: A new theory of phenomenological and behavioural differences. Consciousness and Cognition 16: 913–931.CrossRefGoogle Scholar
  49. Ward, J., C. Jonas, Z. Dienes, and A. Seth. 2010. Grapheme-colour synaesthesia improves detection of embedded shapes, but without pre-attentive ‘pop-out’ of synaesthetic colour. Proceedings of the Royal Society B 277: 1021–1026.CrossRefGoogle Scholar
  50. Weiss, P.H., K. Zilles, and G.R. Fink. 2005. When visual perception causes feeling: Enhanced crossmodal processing in grapheme–color synesthesia. Neuroimage 28: 859–868.Google Scholar

Copyright information

© Springer Science+Business Media Dordrecht 2015

Authors and Affiliations

  1. 1.Department of PhilosophyUniversity of MiamiCoral GablesUSA

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