Interestingly, greater eveningness preference among pre-adolescents and early adolescents is linked to externalizing behaviors in boys and reactive aggression in girls (Susman et al. 2007). (link.springer.com)
Greater autonomy and frequent parent - teen conflict both predict a stronger eveningness (vs. morningness) orientation and, of note, these associations remain present after controlling for both pubertal development and chronological age (Diaz - Morales et al. 2014). (link.springer.com)
Owens believes her data support later start times for middle school and high school, to match the natural shift in adolescents» circadian pattern toward the eveningness chronotype. (sciencedaily.com)