“…NF has been investigated for a wide range of clinical (Birbaumer et al, 2009) and non clinical applications (Sulzer et al, 2013;Thibault et al, 2015Thibault et al, , 2016Sitaram et al, 2016;Arns et al, 2017;Gruzelier, 2014). However its effective deployment in the clinical practice is being held back by the debated evidence about its efficiency, most likely as a result of poor study design and lack of established guidelines and knowledge about the underlying mechanisms of NF (Thibault et al, 2016;Perronnet et al, 2016). In recent years, increasingly rigorous approaches are becoming the new standard (Ros et al, 2019;Sulzer et al, 2013;Stoeckel et al, 2014;Thibault et al, 2016), and new studies are digging into the mechanisms Sitaram et al, 2016;Emmert et al, 2016;Birbaumer et al, 2013;Kober et al, 2013) as well as the methodological aspects of NF (Sorger et al, 2019;Emmert et al, 2017;Krause et al, 2017;Sorger et al, 2016;Sepulveda et al, 2016).…”