Who Uses Direct-to-Consumer Brain Stimulation Products, and Why? A Study of Home Users of tDCS Devices
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Despite the attention garnered by the home (or “do-it-yourself”) use of tDCS (transcranial direct current stimulation), little is known about the population of actual users. The present study aimed to provide a comprehensive examination of those who purchase tDCS devices: who they are, how they learn about tDCS, and why and how they stimulate. A link to an online survey was sent to those who had purchased a tDCS device from seven different companies selling tDCS devices to the public as of June 2016; data was analyzed from 339 participants, the majority of whom reported residing in North America. The typical respondent was a wealthy, highly educated, liberal, fortysomething male living in the USA who reported being an early adopter of technology. Nearly three quarters of respondents reported using tDCS for cognitive enhancement, one-quarter for restoration, and approximately 40% for treatment; many participants selected a combination of usage indications. Notably, approximately one third of participants utilize tDCS to self-treat depression. Most who use tDCS for treatment find the technology to be effective, whereas most who use it for non-treatment purposes (i.e., only enhancement and/or restoration) find it to be ineffective. Approximately 40% of those who purchase tDCS devices either quit using the device (mostly due to lack of efficacy) or have never used the device (mostly due to lack of guidance). Participants depart from established scientific protocol particularly with regard to frequency of stimulation, with 8.4% reporting self-administering 100+ sessions of tDCS. With regard to side effects, a small subset of users (n = 10) reported serious skin burns. This study provides an empirical foundation on which to base policy recommendations and offers a fact-based perspective on a bioethical debate that has too-often been one step removed from reality.
KeywordsTranscranial direct current stimulation tDCS Do-it-yourself Consumer neurotechnology Direct-to-consumer neuroscience Neuroethics
The author thanks Nicholas S. Fitz for assistance with the design and coding of the study; members of the DIY tDCS community for input on the survey; Dawei Xie for statistical support; Jonathan Reisman, Peter Reiner, and the two anonymous reviewers for their comments; and the seven direct-to-consumer tDCS companies who participated in this study.
Compliance with Ethical Standards
Conflict of Interest
The author declares that she has no conflict of interest.
- Batuman, E. (2015). Adventures in transcranial direct-current stimulation. Retrieved October 3, 2017, from http://www.newyorker.com/magazine/2015/04/06/electrified
- Boshara, R., Emmons, W. R., & Noeth, B. J. (2015). The Demographics of wealth: how age, education and race separate thrivers from strugglers in today's economy. Essay No. 2: The Role of Education. Center for Household Financial Stability, Federal Reserve Bank of St. Louis.Google Scholar
- Cabrera, L. Y., Evans, E. L., & Hamilton, R. H. (2013). Ethics of the electrified mind: defining issues and perspectives on the principled use of brain stimulation in medical research and clinical care. Brain Topography, 27(1), 33–45. https://doi.org/10.1007/s10548-013-0296-8.CrossRefPubMedGoogle Scholar
- Denejkina, A. (2016) The promise and peril of DIY electrical brain stimulation. Retrieved October 27, 2017, from http://kernelmag.dailydot.com/issue-sections/headline-story/16371/diy-electrical-brain-stimulation-tdcs-promise-and-peril/
- Eickenhorst, P., Vitzthum, K., Klapp, B. F., Groneberg, D., & Mache, S. (2012). Neuroenhancement among German university students: motives, expectations, and relationship with psychoactive lifestyle drugs. Journal of Psychoactive Drugs, 44(5), 418–427. https://doi.org/10.1080/02791072.2012.736845.CrossRefPubMedGoogle Scholar
- Fitz, N. S., & Reiner, P. B. (2014). The perils of using electrical stimulation to change human brains. In R. Cohen Kadosh (Ed.), The stimulated brain: cognitive enhancement using non-invasive brain stimulation (pp. 61–83). Elsevier. https://doi.org/10.1016/b978-0-12-404704-4.00003-x.
- Fregni, F., Nitsche, M. A., Loo, C. K., Brunoni, A. R., Marangolo, P., Leite, J., et al. (2015). Regulatory considerations for the clinical and research use of transcranial direct current stimulation (tDCS): review and recommendations from an expert panel. Clinical Research and Regulatory Affairs, 32(1), 22–35. https://doi.org/10.3109/10601333.2015.980944.CrossRefPubMedGoogle Scholar
- Horvath, J. C., Forte, J. D., & Carter, O. (2015). Quantitative review finds no evidence of cognitive effects in healthy populations from single-session transcranial direct current stimulation (tDCS). Brain Stimulation, 8(3), 535–550. https://doi.org/10.1016/j.brs.2015.01.400.CrossRefPubMedGoogle Scholar
- IFCN (International Federation of Clinical Neurophysiology (2015). Transcranial electric stimulation in do-it-yourself applications (pp. 1–3); http://www.ifcn.info/uploadfiles/documents/2015/Using_tES_devices_as_DIY_FINAL_13Dec15.pdf
- Lapenta, O. M., Valasek, C. A., Brunoni, A. R., & Boggio, P. S. (2014). An ethical discussion of the use of transcranial direct current stimulation for cognitive enhancement in healthy individuals: a fictional case study. Psychology & Neuroscience, 7(2), 175–180. https://doi.org/10.3922/j.psns.2014.010.CrossRefGoogle Scholar
- Lefaucheur, J.-P., Antal, A., Ayache, S. S., Benninger, D. H., Brunelin, J., Cogiamanian, F., et al. (2017). Evidence-based guidelines on the therapeutic use of transcranial direct current stimulation (tDCS). Clinical Neurophysiology, 128(1), 56–92. https://doi.org/10.1016/j.clinph.2016.10.087.CrossRefPubMedGoogle Scholar
- Lombard, M., Snyder-Duch, J., & Bracken, C. C. (2002). Content analysis in mass communication: assessment and reporting of intercoder reliability. Human Communication Research, 28(4), 587–604. https://doi.org/10.1111/j.1468-2958.2002.tb00826.x.CrossRefGoogle Scholar
- Miller, G. (2014). Inside the Strange New World of DIY Brain Stimulation. Retrieved October 3, 2017, from http://www.wired.com/2014/05/diy-brain-stimulation
- Pew Research Center. (2015a). Public and scientists' views on Science and Society. http://assets.pewresearch.org/wp-content/uploads/sites/14/2015/01/PI_ScienceandSociety_Report_012915.pdf
- Pew Research Center. (2015b). U.S. Public Becoming Less Religious. http://assets.pewresearch.org/wp-content/uploads/sites/11/2015/11/201.11.03_RLS_II_full_report.pdf
- Pew Research Center. (2016a). Early Technology Adopters: Methodology. http://assets.pewresearch.org/wp-content/uploads/sites/12/2016/07/FT_2016_0711_TechAdopters_MethodologyTopline.pdf
- Pew Research Center. (2016b). U.S. Public Wary of Biomedical Technologies to “Enhance” Human Abilities. http://www.pewinternet.org/2016/07/26/u-s-public-wary-of-biomedical-technologies-to-enhance-human-abilities/
- Pew Research Center. (2016c). 2016 Party Identification Detailed Tables; Table 1. http://www.people-press.org/2016/09/13/2016-party-identification-detailed-tables/
- Pew Research Center. (2016d). The Generations Defined. http://www.pewresearch.org/fact-tank/2016/08/29/this-may-be-the-last-presidential-election-dominated-by-boomers-and-prior-generations/ft_16-08-26_generationsdefined_2016_silentgreatest/
- Radiolab. (2014). 9-Volt Nirvana. Retrieved October 3, 2017, from http://www.radiolab.org/story/9-volt-nirvana
- Rodríguez, N., Opisso, E., Pascual-Leone, A., & Soler, M. D. (2014). Skin lesions induced by transcranial direct current stimulation (tDCS). Brain Stimulation: Basic, Translational, and Clinical Research in Neuromodulation, 7(5), 765–767. https://doi.org/10.1016/j.brs.2014.06.005.CrossRefGoogle Scholar
- Saad, L. (2015). U.S. Liberals at Record 24%, but Still Trail Conservatives. Gallup Poll. http://www.gallup.com/poll/180452/liberals-record-trail-conservatives.aspx
- Sarkar, A., Dowker, A., & Cohen Kadosh, R. (2014). Cognitive enhancement or cognitive cost: trait-specific outcomes of brain stimulation in the case of mathematics anxiety. The Journal of Neuroscience, 34(50), 16605–16610. https://doi.org/10.1523/jneurosci.3129-14.2014.CrossRefPubMedPubMedCentralGoogle Scholar
- U.S. Census Bureau (2016). Household Income in 2015, All Races (Current Population Survey, 2016 Annual Social and Economic Supplement). https://www.census.gov/data/tables/time-series/demo/income-poverty/cps-hinc/hinc-01.html
- U.S. Census Bureau (2017). Educational Attainment in the United States: 2015. https://www.census.gov/data/tables/2016/demo/education-attainment/cps-detailed-tables.html; Table 3.
- Wexler, A., & Reiner, P. B. (2017). Home use of tDCS: from “do-it-yourself” to “direct-to-consumer.” In L. S. M. Johnson & K. S. Rommelfanger (Eds.), Routledge Handbook of Neuroethics (pp. 271–284).Google Scholar