Bracelets could also label people as mentally ill, whereas an implanted chip is much less obvious, says Rick Rader of the Orange Grove Center in Chattanooga, Tennessee.
The centre, which cares for children with Down's syndrome, cerebral palsy and autism, was in the media spotlight two years ago when it considered using VeriChip's device in a similar study on its patients, a plan that has since been put on the back burner.
Orange Grove Center VeriChip News items: NPR : Ethical Questions Raised over Implantable Chips
Tennessee Center Considers Offering VeriChip Technology, NPR's
Chips Spark Ethics Concerns