two groups of six mentally retarded adults were exposed to either a `` '' say/do '' '' correspondence training program or a `` '' do only '' '' reinforcement procedure to evaluate the suggestion of rogers-warren and baer ( 1976 ) that reinforcement of the nonverbal target behavior in the absence of the relevant verbal behavior may account for the behavior changes seen in correspondence training .
C0184661
ent proce
C0220825
eval