Well, I don't think statistics correlate well. One of my qualms
  with the education system is they focus on averages and norms
  and statistical smoothing for measuring education progress. The
  outliers are statistical anomalies. They get send off to
  "special education" - which includes both people who are
  "slower" and people who are "talented and gifted".

  They don't fit the bell curve. They get socially screwed and, if
  they don't end up in a decent special education program that's
  tailored properly for their needs? It's a problem.

  We only have certain biochemicals that affect brain function.
  Then we can take other substances (and there's only a LOT OF
  VARIATIONS of a very few base substances that can cross the
  blood-brain barrier; the barrier successfully blocks out MOST
  things from entering the brain thankfully)...

  .. and what those substances do is change the levels in the
  "state system" that is the brain.

  A little more acetycholene is bumped up? This happens. A little
  more Dopamine is bumped? This other thing happens.

  Excesses in one area cause deficiencies in another in a very
  complicated dance of chemistry squirting around our skull.

  I believe they make a difference. Nicotene and caffeine work
  very well for my thinking clarity. Benedryl makes it foggy yet I
  feel at ease and don't care. Too much nicotene and/or caffeine
  and I get wired and my nerves are on edge (mostly skin) and
  brings me into the land of anxiety-attack/uncertainty, etc.

  I tipped the balance over too far.

  So, balance, but which levels are optimum for the best possible
  brain function? Honestly, I wish I could find an internal
  medicine specialist of some kind that could just take a series
  of tests, find out my levels, prescribe me the shit that
  optimizes brain function by maintaining the chemical levels at
  their best...

  ..but our biotech just ain't there yet. We got decades to go at
  least.