"To clarify, what we are talking about here is the alleged phenomenon of transfer – if one set of skills will transfer to untrained tasks. There is not controversy that practice improves skills, that those skill can apply to related tasks, and that people can develop some general academic skills, like studying efficiently.
"What is in dispute is the notion of 'brain training' – that you are
somehow improving the general functioning of your brain by playing brain
games, that you are getting smarter, rather than just better at
performing a specific task."
Review – Brain Training Games Don’t Work
However, this article presents two systems that appear to be backed by evidence.
SCIENCE (from the Latin for 'knowledge') informs wisdom, reason and humanism. This is a 4-legged worldview within reality that maximizes well-being for individuals and society.