Józef BremerORCID id

Mental Disorder or Creative Gift?
The Cognitive Scientific Approach to Synesthesia

20/1 - Spring 2015, pages 73–98
Date of online publication: 12 January 2016
Date of publication: 12 January 2016


In cases where one sense-modality is stimulated by another, we speak of synesthesia, i.e., of a subjective experience of multiple distinct sensations as being quite literally conjoined. The term “synesthesia” is derived indirectly from the Greek words “syn,” meaning “together,” and “aisthesis,” meaning “sensation.” This article focuses on the question of whether synesthesia is in fact a mental disorder or a creative gift. Both the commonsense views that have emerged in recent times, and neurological research, demonstrate that our knowledge of this relatively uncommon phenomenon is slowly but constantly expanding. Proper experimental research conducted with the right sorts of synesthete, and philosophically and scientifically nuanced conceptual studies of synesthesia, can all be helpful when seeking answers to the question posed above, while also confirming general claims about the extent to which our perceptions are really subjective. Most synesthetes see themselves as gifted, and claim that this “conjoining of the senses” enriches the quality of their lives.



Asher, Julian E., Michael R. F. Aitken, Nasr Farooqi, Sameer Kurmani, and Simon Baron-Cohen. “Diagnosing and Phenotyping Visual Synesthesia: A Preliminary Evaluation of the Revised Test of Genuineness (TOG-R).” Cortex 42, no. 2 (2006): 137–46. doi:10.1016/S0010-9452(08)70337-X.

Asher, Julian E., Janine A. Lamb, Denise Brocklebank, Jean-Baptiste Cazier, Elena Maestrini, Laura Addis, Mallika Sen, Simon Baron-Cohen, and An- thony P. Monaco. “A Whole-Genome Scan and Fine-Mapping Linkage Study of Auditory-Visual Synesthesia Reveals Evidence of Linkage to Chromosomes 2q24, 5q33, 6p12, and 12p12.” The American Journal of Human Genetics 84, no. 2 (2009): 279–85. doi:10.1016/j.ajhg.2009.01.012.

Banissy, Michael J., Roi Cohen Kadosh, Gerrit W. Maus, Vincent Walsh, and Jamie Ward. “Prevalence, Characteristics, and a Neurocognitive Model of Mirror-Touch Synesthesia.” Experimental Brain Research 198 (2009): 261– 72. doi:10.1007/s00221-009-1810-9.

Banissy, Michael J., Henning Holle, Josephine Cassell, Lucy Annett, Elias Tsakanikos, Vincent Walsh, Mary Jane Spiller, and Jamie Ward. “Personality Traits in People with Synesthesia: Do Synesthetes Have an Atypical Personality Profile?” Personality and Individual Differences 54, no. 7 (2013): 828–31. doi:10.1016/j.paid.2012.12.018.

Baron-Cohen, Simon, Lucy Burt, Fiona Smith-Laittan, John Harrison, and Patrick Bolton. “Synesthesia: Prevalence and Familiarity.” Perception 25, no. 9 (1996): 1073–9. doi:10.1068/p251073.

Baron-Cohen, Simon, John Harrison, Laura H. Goldstein, and Maria Wyke. “Coloured Speech Perception: Is Synesthesia What Happens When Modularity Breaks Down?” Perception 22, no. 4 (1993): 419–26. doi:10.1068/ p220419.

Baudelaire Charles. Les fleurs du mal. Edited by Antoine Adam. Paris: Garnier, 1961.

Brang, David, and Vilayanur S. Ramachandran. “Survival of the Synesthesia Gene: Why Do People Hear Colors and Taste Words?” PLoS Biology 9, no. 11 (2011). doi:10.1371/journal.pbio.1001205.

Bremer, Józef. Jak to jest być świadomym [What It Is Like to Be Conscious]. Warsaw: IFiS PAN, 2005.

Bremer, Józef. Osoba—fikcja czy rzeczywistość? [Person—Fiction or Reality?]. Cracow: Aureus, 2008.

Brumbaugh, Robert S. The Philosophers of Greece. Albany: State University of New York Press, 1981.

Choi, Charles Q. “Study: People Literally Feel the Pain of Others.” Livescience. Published 17 June 2007. Accessed 28 January 2014. http://www.livescience. com/health/070617_touching_faces.html.

Cytowic, Richard E. Synesthesia: A Union of the Senses. Cambridge, MA: MIT Press, 2002.

Cytowic, Richard E. “Synesthesia: Phenomenology and Neuropsychology; A Review of Current Knowledge.” In Synesthesia: Classic and Contemporary Readings, edited by Simon Baron-Cohen and John E. Harrison, 17–39. Oxford: Blackwell, 1997.

Cytowic, Richard E., and David M. Eagleman. Wednesday Is Indigo Blue: Discovering the Brain of Synesthesia. Cambridge, MA: MIT Press, 2009.

Day, Sean. “Some Demographic and Socio-Cultural Aspects of Synesthesia.” In Lynn C. Robertson and Noam Sagiv, eds. Synesthesia: Perspectives from Cognitive Neuroscience, 11–33. Oxford: Oxford University Press, 2005.

Day, Sean. “Synesthesia: A First-Person Perspective.” In Julia Simner and Edward M. Hubbard, eds, The Oxford Handbook of Synesthesia. 903–23. Oxford: Oxford University Press, 2013. doi : 10 . 1093/oxfordhb/9780199603329.013.0044.

Dixon, Mike J., Daniel Smilek, and Philip M. Merikle. “Not All Synesthetes are Created Equal: Projector Versus Associator Synesthetes.” Cognitive, Affective, and Behavioral Neuroscience 4, no. 3 (2004): 335–43. doi:10.3758/ CABN.4.3.335.

Domino, George. “Synesthesia and Creativity in Fine Arts Students: An Empirical Look.” Creativity Research Journal 2, no. 1–2 (1989): 17–29. doi:10. 1080/10400418909534297.

Duffy, Patricia Lynne. “Synesthesia in Literature.” In Julia Simner and Edward M. Hubbard, eds, The Oxford Handbook of Synesthesia, 647–70. Oxford: Oxford University Press, 2013. doi:10. 1093/oxfordhb/9780199603329.013.0033.

Feynman, Richard P. What Do You Care What Other People Think? Further Adventures of a Curious Character. New York: Norton, 1988.

Foner, Leonard N. “Artificial Synesthesia via Sonification: A Wearable Augmented Sensory System.” Mobile Networks and Applications 4, no. 1 (1990): 75–81. doi:10.1023/A:1019178210975.

Galton, Francis. “The Visions of Sane Persons.” Fortnightly Review 29 (1881): 729–40.

Gray, Jeffrey A. “Synesthesia: A Window on the Hard Problem of Consciousness.” In Lynn C. Robertson and Noam Sagiv, eds. Synesthesia: Perspectives from Cognitive Neuroscience, 127–46. Oxford: Oxford University Press, 2005.

Gray, Richard. “Cognitive Modules, Synesthesia and the Constitution of Psychological Natural Kinds.” Philosophical Psychology 14, no. 1 (2001): 65– 82. doi:10.1080/09515080120033562.

Grossenbacher, Peter G., and Christopher T. Lovelace. “Mechanisms of Synesthesia: Cognitive and Physiological Constraints.” Trends in Cognitive Sciences 5, no. 1 (2001): 36–41. doi:10.1016/S1364-6613(00)01571-0.

Harrison, John. Synesthesia: The Strangest Thing. Oxford: Oxford University Press, 2001.

Hochel, Matej, and Emilio G. Milán. “Synesthesia: The Existing State of Affairs.” Cognitive Neuropsychology 25, no. 1 (2008): 93–117. doi:10.1080/ 02643290701822815.

Hoffman, Albert. LSD: My Problem Child. In LSD: My Problem Child; Insights / Outlooks. Translated by Jonathan Ott. Edited by Amanda Feilding. Oxford: Oxford University Press, 2013.

Hubbard, Edward M. “Synesthesia and Functional Imaging.” In Julia Simner and Edward M. Hubbard, eds, The Oxford Handbook of Synesthesia, 475–99. Oxford: Oxford University Press, 2013. doi:10.1093/oxfordhb/9780199603329.013.0024.

Jäncke, Lutz. “The Timing of Neurophysiological Events in Synesthesia.” In Julia Simner and Edward M. Hubbard, eds, The Oxford Handbook of Synesthesia, 558–69. Oxford: Oxford University Press, 2013. doi:10.1093/oxfordhb/9780199603329.013.0028.

Jewanski, Jörg. “Synesthesia in the Nineteenth Century: Scientific Origins.” In Julia Simner and Edward M. Hubbard, eds, The Oxford Handbook of Synesthesia, 369–98. Oxford: Oxford University Press, 2013. doi:10.1093/oxfordhb/9780199603329.013.0019.

Jewanski, Jörg, Julia Simner, Sean Day, and Jamie Ward. “The Development of a Scientific Understanding of Synesthesia from Early Case Studies (1849–1873).” Journal of the History of the Neurosciences: Basic and Clinical Per- spectives 20, no. 4 (2011): 284–305. doi:10.1080/0964704X.2010.528240.

Kyan, A. “Sensory Overload or Synesthesia.” A. Kyan’s blog, Serendip Studio, Published 17 April 2007. Accessed 1 March 2014. http://serendip.brynmawr. edu/exchange/node/354.

Leeuwen, Tessa M. van. “Individual Differences in Synesthesia.” In Julia Simner and Edward M. Hubbard, eds, The Oxford Handbook of Synesthesia, 241– 64. Oxford: Oxford University Press, 2013. doi:10.1093/oxfordhb/9780199603329.013.0013.

Luke David P., and Devin B. Terhune. “The Induction of Synesthesia with Chemical Agents: A Systematic Review.” Frontiers in Psychology 4 (2013): 753. doi:10.3389/fpsyg.2013.00753.

Luria, Alexander Romanovich. The Mind of a Mnemonist: A Little Book about a Vast Memory. Cambridge, MA: Harvard University Press, 1968.

Macpherson, Fiona. “Synesthesia, Functionalism and Phenomenology.” In Cartographies of the Mind: Philosophy and Psychology in Intersection, edited by Massimo Marraffa, Mario De Caro, and Francesco Ferretti, 65–80. Dordrecht: Springer, 2007. doi:10.1007/1-4020-5444-0_5.

Maisel, Eric R. “The New Definition of a Mental Disorder.” Psychology Today (website). Posted 23 July 2013. Accessed 18 February 2014. https:// www.psychologytoday.com/blog/rethinking-psychology/201307/the-new- definition-mental-disorder.

Malli, Nisa. “Synesthesia: How Messiaen saw the World.” La Scena Musicale 9 (2008): 13.

Mann, Heather, Jason Korzenko, Jonathan S. A. Carriere, and Mike J. Dixon. “Time-Space Synesthesia—a Cognitive Advantage?” Consciousness and Cognition 18, no. 3 (2009): 619–27. doi:10.1016/j.concog.2009.06.005.

Meier, Beat, and Nicolas Rothen. “Grapheme-Color Synesthesia is Associated with a Distinct Cognitive Style.” Frontiers in Psychology 3 (2013). PMCID: PMC3777024. doi:10.3389/fpsyg.2013.00632.

Meijer, Peter B. L. “Artificial Synesthesia for Synthetic Vision.” The vOICe (website). Accessed 11 November 2015. https://www.seeingwithsound.com/asynesth.htm.

Mohr, Christine. “Synesthesia in Space Versus the ‘Mind’s Eye’: How to Ask the Right Questions.” In Julia Simner and Edward M. Hubbard, eds, The Oxford Handbook of Synesthesia, 440–58. Oxford: Oxford University Press, 2013. doi:10.1093/oxfordhb/9780199603329. 013.0022.

Mortiz, William. “Abstract Film and Color Music.” In The Spiritual in Art: Abstract Painting 1890–1985, 296–311. New York: Abbeville, 1986. Los Angeles County Museum of Art exhibition catalog.

Mulvenna, Catherine M. “Synesthesia and Creativity.” In Julia Simner and Edward M. Hubbard, eds, The Oxford Handbook of Synesthesia, 607–30. Oxford: Oxford University Press, 2013. doi: 10.1093/oxfordhb/9780199603329.013.0031.

Nikolić, Danko. “Is Synesthesia Actually Ideaestesia? An Inquiry into the Nature of the Phenomenon.” Paper presented at the Third International Congress on Synesthesia, Science & Art, Granada, 26–29 April 2009. http://www. danko- nikolic.com/wp-content/uploads/2011/09/Synesthesia2009- Nikolic-Ideaesthesia.pdf.

Nussbaumer, Fidelis Alois. “Über subjektive ‘Farben’empfindungen, die durch objektive ‘Gehör’empfindungen erzeugt werden: Eine Mitteilung durch Beobachtungen an sich selbst.” Wiener Medizinische Wochenschrift 1 (1873): 4–7; 2 (1873): 28–31; 3 (1873): 52–54.

Robertson, Lynn C., and Noam Sagiv, eds. Synesthesia: Perspectives from Cognitive Neuroscience. Oxford: Oxford University Press, 2005.

Ramachandran, Vilayanur S., and Edward M. Hubbard. “Hearing Colors, Tasting Shapes.” Scientific American 16 (2006): 76–83. doi:10.1038/scientificamerican0906- 76sp.

Ramachandran, Vilayanur S. and Edward M. Hubbard. “Psychophysical Investigations into the Neural Basis of Synesthesia.” Proceedings of the Royal Society B: Biological Sciences 268 (2001): 979–83. doi:10.1098/rspb.2000.1576.

Rich, Anina N., John L. Bradshaw, and Jason B. Mattingley. “A Systematic, Large-Scale Study of Synesthesia: Implications for the Role of Early Experience in Lexical-Colour Associations.” Cognition 98, no. 1 (2005): 53–84. doi:10.1016/j.cognition.2004.11.003.

Rich, Anina N., and Jason B. Mattingley. “Anomalous Perception in Synesthesia: A Cognitive Neuroscience Perspective.” Nature Reviews Neuroscience 3, no. 1 (2002): 43–52. doi:10.1038/nrn702.

Rimbaud Arthur. Poésies completes. Paris: Léon Vanier, 1895. https://fr.wikisource.org/wiki/Poésies_(Rimbaud)/éd._Vanier,_1895.

Ro, Tony, Alessandro Farnè, Ruth M. Johnson, Van Wedeen, Zili Chu, and Zhiyue Jerry Wang. “Feeling Sound After a Thalamic Lesion.” Annals of Neurology 62, no. 5 (2007): 433–41. doi:10.1002/ana.21219.

Rogowska, Aleksandra Maria. Synesthesia and Individual Differences. Cambridge: Cambridge University Press, 2015. doi:10.1017/CBO9781316156230.

Rothen, Nicolas, Beat Meier, and Jamie Ward. “Enhanced Memory Ability: Insights from Synesthesia.” Neuroscience and Biobehavioral Reviews 36, no. 8 (2012): 1952–63. doi:10.1016/j.neubiorev.2012.05.004.

Rouw, Romke. “Synesthesia, Hyper-Connectivity, and Diffusion Tensor Imaging.” In Julia Simner and Edward M. Hubbard, eds, The Oxford Handbook of Synesthesia, 500–518. Oxford: Oxford University Press, 2013. doi:10.1093/oxfordhb/9780199603329.013.0025.

Rouw, Romke, and H. Steven Scholte. “Neural Basis of Individual Differences in Synesthetic Experiences.” The Journal of Neuroscience 30, no. 18 (2010): 6205–6213. doi:10.1523/JNEUROSCI.3444-09.2010.

Sacks, Oliver, Richard L. Wasserman, Semir Zaki, and Richard M. Siegel. “Sudden Colour Blindness of Cerebral Origin.” Society for Neuroscience Abstracts 14 (1988): 1251.

Simner, Julia. “Defining Synesthesia.” British Journal of Psychology 103, no.1 (2012): 1–15. doi:10.1348/000712610X528305.

Simner, Julia. “Defining Synesthesia: A Response to Two Excellent Commentaries.” British Journal of Psychology 103 (2012): 24–7. doi:10.1111/j.2044-8295.2011.02059.x.

Simner, Julia, and Angela E. Bain. “A Longitudinal Study of Grapheme-Color Synesthesia in Childhood: 6/7 Years to 10/11 Years.” Frontiers in Human Neuroscience 7, no. 603 (2013): 1–9. doi:10.3389/fnhum.2013.00603.

Simner, Julia, Jennifer Harrold, Harriet Creed, Louise Monro, and Louise Foulkes. “Early Detection of Markers for Synesthesia in Childhood Populations.” Brain: A Journal of Neurology 132, no. 1 (2009): 57–64. doi:10.1093/brain/awn292.

Simner, Julia, and Edward M. Hubbard, eds. The Oxford Handbook of Synesthesia. Oxford: Oxford University Press, 2013. doi:10.1093/oxfordhb /9780199603329.001.0001.

Simner, Julia, Neil Mayo, and Mary Jane Spiller. “A Foundation for Savantism? Visuo-spatial Synesthetes Present with Cognitive Benefits.” Cortex 45, no. 10 (2009): 1246–60. doi:10.1016/j.cortex.2009.07.007.

Simner, Julia, Catherine Mulvenna, Noam Sagiv, Elias Tsakanikos, Sarah A. Witherby, Christine, Fraser, Kirsten Scott, and Jamie Ward. “Synesthesia: The Prevalence of Atypical Cross-modal Experiences. Perception 35, no. 8, (2006): 1024–1033. doi:10.1068/p5469.

Skelton, Richard, Casimir Ludwig, and Christine Mohr. “A Novel, Illustrated Questionnaire to Distinguish Projector and Associator Synesthetes.” Cortex 45, no. 6 (2009): 721–9. doi:10.1016/j.cortex.2008.02.006.

Spalding, J. M. K., and Oliver Louis Zangwill. “Disturbance of number-form in a case of brain injury.” Journal of Neurology, Neurosurgery, and Psychiatry 13, no. 1 (1950): 24–29.

Tomson, Steffie N., Nili Avidan, Kwanghyuk Lee, Anand K. Sarma, Rejnal Tushe, Dianna M. Milewicz, Molly Bray, Suzanne M. Leal, and David M. Eagleman. “The Genetics of Colored Sequence Synesthesia: Suggestive Evidence of Linkage to 16q and Genetic Heterogeneity for the Condition.” Behavioural Brain Research 223, no. 1 (2011): 48–52. doi:10.1016/j.bbr.2011. 03.071.

Ward, Jamie. “State of the Art: Synesthesia.” The Psychologist 16, no. 4 (2003): 196–9. https://thepsychologist.bps.org.uk/getfile/2701.

Ward, Jamie, Brett Huckstep, and Elias Tsakanikos. “Sound-Colour Synesthesia: To What Extent Does It Use Cross-modal Mechanisms Common to Us All?” Cortex 42, no. 2 (2006): 264–80.

Ward, Jamie, and Jason Mattingley. “Synesthesia: An Overview of Contemporary Findings and Controversies.” Cortex 42, no. 2 (2006): 129–36. doi:10. 1016/S0010- 9452(08)70336- 8.

Watson, Marcus R., Kathleen A. Akins, and James T. Enns. “Second-order Mappings in Grapheme-Color Synesthesia.” Psychonomic Bulletin and Review 19, no. 2 (2012): 211–7. doi:10.3758/s13423-011-0208-4.

Weiss, Peter H. “Can Gray Matter Studies Inform Theories of (Grapheme- Color) Synesthesia?” In Julia Simner and Edward M. Hubbard, eds, The Oxford Handbook of Synesthesia, 519–21. Oxford: Oxford University Press, 2013. doi:10.1093/oxfordhb/9780199603329.013.0026.

Ziegler, Matthias, Erik Danay, Moritz Heene, Jens Asendorpf, and Markus Bühner. “Openness, Fluid Intelligence, and Crystallized Intelligence: Toward an Integrative Model.” Journal of Research in Personality 46, no.2 (2012): 173– 83. doi:10.1016/j.jrp.2012.01.002.