To be fair, the actual article text was "adolescents", and someone can be going through puberty at twelve, so the body text is correct. Might have been that a different party writes the headline, and considered it to be a mechanical shortening, as the terms are generally used kinda interchangably.
Good catch, though.
Not directly related, but do you use an actual APL keyboard or use something with an APL input method, like emacs?