“…Research has examined whether particular client variables contribute to responsiveness to the token economy, but the evidence has been inconsistent. For example, in token economies for psychiatric patients, degree of patient withdrawal, social isolation and length of hospitalization are negatively correlated with improvement in some studies (Ayllon & Azrin, 1968b;Fullerton, Cayner, & McLaughlin-Reidel, 1978) but unrelated or even positively correlated with responsiveness in other studies (Allen & Magaro, 1971;Mishara, 1978). Similarly, conflicting evidence within and across target populations has been provided for the relations between age, IQ, and gender and responsiveness to the contingencies (e.g., Fullerton et al, 1978;Mishara, 1978;Moran, Kass, & Munz, 1977).…”