“…Unfortunately, these interventions often lacked conceptual coherence, and measures of risk and risk reduction were often restricted to overt behaviours (Simpson et al, 1994;Stevens et al, 1998). Theory-directed studies have been somewhat more successful in decreasing HIV risk related to needle use (Andersen et al, 1993;Baker et al, 1993;Bowen & Trotter, 1995;Corby et al, 1996;Cottler et al, 1998;Hawkins et al, 1999;Mandell et al, 1994;Rhodes & Malotte, 1996;Rhodes et al, 1998;Robles et al, 1998;Stark et al, 1998); however, encouraging drug users to initiate and maintain condom use continues to be daunting.…”