Be sure to use verbal reward to reinforce good behavior while your dog learns to accept the presence and touch of other people. (pmcofedmond.com)
It is safe to say, however, that when used appropriately verbal rewards and perhaps also tangible rewards can positively affect student achievement. (ascd.org)
There was a time not long ago where dog trainers thought it better to give only verbal reward during obedience sessions but this is no longer the case. (professorshouse.com)