Half of parents track their young adult children though their cell phone.

According to a new University of Michigan Health C.S. Mott Children’s Hospital National Poll on Children’s Health, half of parents of young adults, ages 18-25, track their child's location at least occasionally through location-sharing apps. WWJ's Ryan Wrecker talked to Mott Poll Co-Director Dr. Sarah Clark, who says this raise questions about family boundaries in the smartphone era. (Photo credit: iStock / Getty Images Plus)