A major problem in the development of an adequate theory of the sexual offe
nce process is the heterogeneity of offenders. This lack of a clear underst
anding of both why and how people sexually offend against children continue
s to hinder the development of effective methods of intervention for these
individuals. The aim of this article is to critically review some of the ap
proaches that have been adopted in an attempt to provide a reliable and val
id classification system for child molesters and to consider the impact tha
t such systems have had on the structuring of interventions to meet the dif
fering needs of this client group.