OIBR Fellow, Pamela Orpinas’ research suggests that a “cluster of problem behaviors” may be evident as early as sixth grade. Andrea Horsman on March 1, 2017 ‘Problem Behaviors’ Category: News Post navigation Previous: Previous post: 2017 William A. Owens Lecture Date Set for March 28, 2017Next: Next post: New research from OIBR Fellow, Gene Brody, links poverty to stifled brain development in children.