Studies on the treatment of attention disorders:

A meta-analysis published in 2009 includes 15 controlled studies on over 1000 children and states that the neurofeedback method is effective for the treatment of attention disorders
The treatment method, based on the neural feedback, is as effective as the use of Ritalin. This is according to a study conducted between 2007-2009 and recently published in the journal BMC Psychiatry

Studies on the treatment of epilepsy:

A meta-analysis that reviews articles and studies that appeared in scientific journals
A case study published in a scientific journal, which teaches about a significant improvement in the number of seizures and the cognitive abilities of an epilepsy patient

Studies on autism treatment:

Dr. Robert Cuban, reviews in an article published in a scientific journal, the treatment of neurofeedback in the communication spectrum.

Studies on QEEG testing:

QEEG Ribi Sela 2019 test benefits
QEEG – what is this test?

Studies on the treatment of anxiety and trauma using neurofeedback:

A study on the effectiveness of neurofeedback as a treatment for PTSD trauma 2016 VAN DER KOLK
Effectiveness of neurofeedback to improve symptoms of sadness and anxiety 2016 YU WANG