“…Variations of a token economy have been implemented with individuals with psychiatric disorders who were hospitalized (Ayllon & Azrin, 1965, 1968, children diagnosed with attention deficit hyperactivity disorder (Ayllon, Layman, & Kandel, 1975;Hupp & Reitman, 1999;Robinson, Newby, & Ganzell, 1981), adolescents with behavior disorders (Foxx, 1998), students with learning disabilities (Cavalier, Ferritte, & Hodges, 1997), workers in industrial settings (Foxx, Hopkins, & Anger,The effects of different parameters of token reinforcement have been investigated thoroughly and it has been demonstrated that token reinforcement is most effective when back-up reinforcement is available, and when tokens can be exchanged without delay (Kazdin, 1977). Basic research conducted with nonhumans has also corroborated these findings and has further demonstrated that response patterns observed under a variety of schedules of token delivery resemble those obtained under schedules of primary reinforcement, contributing to the validity of the token economy (e.g., Kelleher, 1958).…”