MedicalResearch.com Interview with:
Laura Steenbergen, MSc., PhD Candidate
Cognitive Psychology at Institute of Psychology
Leiden University
Medical Research: What is the background for this study? What are the main findings?
Response: A recent initiative supported by several eminent research institutes and scientists calls for a more critical and active role of the scientific community in evaluating the sometimes far-reaching, sweeping claims from the brain training industry with regard to the impact of their products on cognitive performance. tDCS is a noninvasive brain stimulation technique that has developed into a promising tool to boost human cognition. Previous studies using
medical tDCS devices have shown that tDCS promotes working memory (WM) updating in healthy individuals and patients. The aim of the current study was to investigate whether the
commercial tDCS headset
foc.us (v.1), which is easily and freely available to anyone in the world,
does in fact improve cognitive performance, as advertised in the media. Results showed that active stimulation with the commercial device, compared to sham stimulation, significantly decreased working memory performance. The device we tested
is just one example of a commercial device that can easily be purchased and, without any control or expert knowledge, used by anyone. The results of our study are straightforward in showing that the claims made by companies manufacturing such devices need to be validated. Even if the consequences of long-term or frequent use of the device are yet to be demonstrated, our findings provide strong support the important role of the scientific community in validating and testing far reaching claims made by the brain training industry.