Wasn't it 25 that the prefrontal cortex matured and people could be considered adults? We will have to infantilize people until their 30s now?

The problem with such reports (the studies themselves method-wise etc are in general fine I guess, but how the results are interpreted and disseminated is the issue) is that unless we find some specific correlations with behavioural and such measures, it makes no sense to give these kind of meanings such as "adolescence", adult mode", behavioural/mental/cognitive matureness or whatever cultural or other norms one may think a "mature/adult person" should abide to. Especially since these abstract topological measures, while interesting, are not that trivially linked with real outcomes in a causal sense, and instead of eg simply reflecting rather environmental or other changes in a person's life.

I haven't read this paper, but for the "25" paper, it was a longitudinal study that stopped observing people at 25. The result "brain continues to develop up to at least age 25" was misinterpreted as "stops developing at age 25" by media & social media.

I have similar concerns about reporting on this paper - feels ripe for pop-sci misunderstandings.

"Infantilize" is a needlessly hyperbolic verb.

I've always found it interesting that laws are set by politics to allow privileges at certain ages (16, 18, 21), but car rental companies - whose motives are more purely data-driven - won't rent to anyone under 25.

I'm certainly not advocating withholding suffrage until 25, but driving... the data is very strong that it would save lives.

> We will have to infantilize people until their 30s now?

People already pick and choose who they feel sympathy for and give a pass to on the basis of their personal experiences, belief system, and social proximity. Think of how many, for instance, ridicule politicians for being too saintly and enabling or mean and without empathy then give their friends and family a pass for the exact same behavior. They'll get angry with celebrities for things that they allegedly did then shrug off a driver running a red light and nearly killing them because they "don't take things personally". Addicts are a blight on society until it's somebody's child or brother or sister in which case they just need help. Et cetera ad infinitum.

People (you and I included) are fickle. This changes nothing.