Bias

The following seems to be irrelevant and biased.

"These popular psychology tricksters often employ popular assumptions about the brain and the cerebral hemispheres that are scientifically wrong, but attractive and easy to believe. Similar scams involve the use of brain machines to alter brain waves, and intelligence amplification "

Seems like someone is giving their hobby horse a whipping. It's just about as relevant as the following:-

The pharmaceutical con

Pharamaceutical companies often sell drugs at massive profit to consumers desperate to recuperate from fatal and chronic illnesses, despite some of these drugs demonstrating less than 50% efficacy in randomised double blind studies. At the same time, the pharmaceuticals fund 'independent' studies that dismiss the efficacy of naturally occurring compounds (where patent claim cannot be made). 

Yours sincerely - ~~CS~~