A teen girl approaches her parents with a grievance: She believes she is treated unfairly. “I feel like you’re giving my older brother much more privileges. It’s not just my age, I feel like you trust him more than you’ll ever trust me.” Jean-Michel Robichaud, a psychologist at the Université de Moncton in New Brunswick, studies situations like this when adolescents feel hurt by their parents’ actions. While working as a therapist at Jewish Gene…