In the early 1980s the transtheoretical model of change was still in its
infancy. Seminal publications were just appearing, but the model already
seemed to hold such promise that we made it the organizing theme for the
Third International Conference on Treatment of Addictive Behaviors
(ICTAB-3), which convened in Scotland in 1984. That meeting gave rise to
the first edition of this volume (Miller & Heather, 1986), which focused
on processes involved in moving people from one stage to the next. With
the volume still in print more than a decade later, we were approached
by Plenum Press with the idea of preparing this second edition. We were,
obvi- ously, persuaded that there was merit to the idea. Since 1986 the
work of Pro- chaska and DiClemente has grown exponentially in popularity
and influence. In Britain and the Americas, it is now unusual to find an
addiction professional who has not at least heard about the stages of
change, and more sophisticated applica- tions of the transtheoretical
model are spreading through health care systems and well beyond. The
model has influenced professional training, health care delivery, and
the design of many studies including a number of large clinical trials.