Because change occurs within, between, and without therapy sessions, t
he keys to common factors are not likely to be discovered by focusing
just on the 1% of the week that clients spend in therapy. By studying
how people change on their own as well as in therapy, we have identifi
ed common stages and processes of change. Matching processes to stages
has produced a viable integration that is having considerably more im
pact in health psychology and the addictions than in the traditional m
ental health arena. Research with this integrative approach is demonst
rating how intervention programs can reach more people, retain more pe
ople, and help many more people recover from self-defeating or self-de
structive behaviors.