My cousin Richard taught me an important lesson when we were teenagers. He is a year older and follows sports avidly. When I casually mentioned to him that I followed baseball, he asked me if I knew who was in first, second, third place, etc... in the American League East, National League West... There were 24 teams at the time, in four divisions. I did not really "follow baseball," it turned out, because all I knew was how a few teams at the top of the standings were doing, not the exact ranking of these twenty-four teams. He wasn't being mean, and wasn't even trying to teach me a crucial lesson, but I learned one from him.
So no, you aren't doing interdisciplinary work if you've read one or two anthropology or psychology articles.A teenage boy can follow baseball as well as anyone else with no special training, and can spot a dilettante instantly.