This article introduces the special section dealing with research on attach
ment and psychotherapy. Although John Bowlby conceptualized his theory as a
tool for clinicians to acquire a better understanding of the development o
f psychopathology and emotional distress, it took a long time until clinica
l researchers started to make use of Bowlby's theory. During the last decad
e, a large number of studies have been published showing that attachment th
eory could be very useful within different fields of psychotherapy research
, such as differentiating psychopathology, therapist characteristics, and a
spects of the therapeutic alliance. These fields are briefly stressed and r
elated to the articles in the special section emphasizing some future direc
tions of attachment response within psychotherapy.