On-line therapy offers many advantages over face-to-face settings. Interapy
includes psycho-education, screening, effect measures and protocol-driven
treatment via the Internet for clients. The present paper reports the resul
ts of a controlled trial on the Interapy treatment of posttraumatic stress
and grief in students, gaining course credits. The participants in the expe
rimental condition (n = 13) improved significantly than the participants in
the waiting-list control condition (n = 12), on trauma-related symptoms an
d general psychopathology. The effect sizes were large. Eighty percent of t
he treated participants showed clinically significant improvement after tre
atment. The possibilities for future research with Interapy, including stud
ies into moderating variables, are discussed. (C) 2001 Elsevier Science Ltd
. All rights reserved.