Science Finally Shows When (Cognitive) Adulthood Begins

No, this is NOT the usual "teen brain" junk science that we have quite frankly gotten tired of debunking.  This is the real deal, so listen up and pay very close attention. 

Researchers at the University of Pittsburgh recently published a new, large, and groundbreaking study in Nature Communications that examined nearly two dozen laboratory measures of "executive function" of a whopping 10,000 participants (ages 8 through 35) across four different datasets.  And the results dovetail nicely with what we at Twenty-One Debunked have been generally saying all along, and we quote (emphasis added):

"The resulting analysis showed a common dynamic of executive function maturation that was shared between both sexes: a rapid burst of executive function development in late childhood to mid-adolescence (10-15 years old), followed by small but significant changes through mid-adolescence (15-18) that stabilized to adult-level performance by late adolescence (18-20)."

"Other important behavioral factors that complement executive function, such as the ability to control one's own emotions, can change with age. The ability to use executive function reliably improves with age and, at least in a laboratory setting, matures by 18 years of age."

In other words, 18-20 year olds are in fact adults, not only biologically, but also neurologically and cognitively as well.  And the data show that even 15-17 year olds are actually pretty darn close as well.  Thus, there is really no scientific reason to set the age of majority (or any related age limit for that matter) any higher than 18, period.  In fact, one can even justify setting some age limits a bit lower than that based on this research (after all, it's not binary like flicking a light switch, but rather a gradual process).

So why have so many other, flashier studies seemed to have suggested otherwise?  Well, the brain technically does continue developing to some extent well beyond 18, of course, but that apparent development has been known for over a decade now to continue well into the 30s, 40s, and likely even beyond that as well.  Clearly, any development that does occur from 18 to 21 or 25 is on the very same spectrum as the development that continues beyond that as well.  A brain that continues to change and develop throughout life does not lend itself to simplistic explanations of a magical age of neurological adulthood based on its superficial appearance on a brain scan.  Rather, the real question becomes when the brain is no longer developing on a critical or fundamental level, and when one can achieve an adult level cognitive capacity and performance.  And the University of Pittsburgh study above answers that question far better than just about any other study has so far to date.

So basically, we as a society have three choices on what to do given these findings:  1) radically redefine adulthood, 2) radically redefine adolescence, or 3) simply accept 18-20 year olds as adults, in every way, period.  Occam's Razor would clearly agree with the third option, as would any serious consideration of liberty and justice for all.

To argue otherwise is, at this point, nothing short of warmed-over phrenology at best, if not full-blown political Lysenkoism that will ultimately go down in history as the epitome of bigoted crank science.

UPDATE:  Much to the chagrin of some purists, this study is also the strongest hard evidence to date that adolescence does in fact exist as a distinct life stage that is not entirely socially constructed.  Adolescence appears to be no more socially constructed than adulthood is, in fact.  And to that we say, so what?  Glibly denying all group differences and/or attempting to erase adolescence entirely does not do young people any favors either, and it plays right into the hands of the biological determinist bigots and cranks.  That said, the study finds no scientific support for the specious idea of "emerging adulthood" as a life stage somehow distinct from young adulthood, and we really should simply jettison the term "emerging adulthood" from our collective vocabulary. 

In any case, there is nothing magical about turning 21, 25, or any other age north of 18 for that matter.  And while even 18 is hardly magical either, it is arguably the least arbitrary place to draw the default line where once you are an adult, you are an adult, period.

The Abysmal Failure of "Peer Review"

There is an excellent Substack article by Adam Mastroianni, that dives fairly deep into why "peer review" in science is not only useless, but often worse than useless.  Continuing in the tradition of the legendary John Ioannidis, he notes how this process, which should really be called "pal review" or "gatekeeping", not only does NOT keep even glaring junk science findings from published, but actually ends up rigging the game in favor of the rich and powerful, and propping up mainstream narratives above the truth. Peer review as we know it is really only about six decades old, and it can be considered a failed experiment.  The scientific method has clearly NOT improved since then, to say the very least.

Woe, you mean that turning science into little more than a popularity contest at best, and a pay-to-play at worst, has not made science objectively any better, and likely made it worse?  Gee, I'm shocked, I tell you, shocked!  Who could have seen that coming?

And while he doesn't discuss the utter abomination that passes for research on the 21 drinking age, we at Twenty-One Debunked note that this is probably the most salient example of the failure of peer review.  The pro-21 crowd basically has their own "citation mill" of the same old MADD affiliates and fellow travelers to prop up their faulty narrative, constantly moving the goalposts when eventually debunked, while anything that contradicts their narrative is censored or delayed for publication in mainstream journals.  It was truly a miracle that Miron and Tetelbaum (2009), Asch and Levy (1987 and 1990), Mike Males (1986 and 2008), and literally anything by Darren Grant ever even got published at all, and Dee and Evans (2001) probably only got published by "nerfing" their findings a bit first.  And forget most meta-analysis and reviews, as those (except for Darren Grant in 2011) have been hopelessly rigged, padded, and cherry-picked beyond all recognition.

And then they have the GALL to call the anti-21 researchers "merchants of doubt" or (usually falsely) claim that they are funded by Big Alcohol.  Riiiiight. 

It's time to end this utterly failed experiment. 

That Really Explains A Lot

An Alternet article titled "The Most Depressing Discovery About the Brain, Ever", along with the related Grist article, "Science Confirms:  Politics Wrecks Your Ability to Do Math", sheds a great deal of light on why it is so hard to get people to accept the truth when it conflicts with their political views.  A recent study found that our political passions can easily (and unfortunately) undermine our most basic reasoning skills.  That is, no matter how good one is at math, one may get the answer to a math problem wrong if the right answer contradicts their political beliefs.  Worse, when people are misinformed, giving them facts to correct such errors only makes them cling to their erroneous beliefs even more.  And this is true no matter how smart someone is--in fact political passion appeared to trump reason even more so for those who were better at math!  A truly depressing discovery indeed.

All this explains why our movement in particular has had such a hard time convincing the opposition about the error of their ways.  For an issue as fraught and passionate as the drinking age, it seems that for many of our opponents, no amount of evidence is enough to convince them that their unscientific and pseudo-scientific positions really don't stand up to scrutiny.   A particular debate that our group's leader had with an otherwise intelligent and well-educated member of the pro-21 crowd (with a PhD no less!) comes to mind.  The opponent's "evidence" and faulty logic were refuted over and over again by citing the best studies on the matter, and yet he still refused to budge one bit, finding every conceivable reason to believe that our data were suspect.  This literally went on for weeks.  But eventually he just got tired of arguing and walked away with his proverbial tail between his legs, after which we proudly declared victory.

In other words, we really do have our work cut out for us, and more so than we ever thought.