“…Neurofeedback is biofeedback applied to the brain and the central nervous system (Hammond, 2006). Numerous quantitative studies have indicated that neurofeedback may be effective in ameliorating symptoms often rooted in traumatic experience such as depression and anxiety (Hammond, 2005), substance abuse (Kelley, 1997;Peniston & Kulkosky, 1999;Scott, Kaiser, Othmer & Sideroff, 2005), posttraumatic stress disorder (Peniston & Kulkosky, 1991;Smith, 2008), and somatic symptoms such as migraine headaches (Stokes & Lappin, 2010) and fibromyalgia (Mueller, Donaldson, Nelson, & Layman, 2001). However, there is a paucity of research exploring the factors that produce those positive outcomes.…”