This research was aimed to find out the effect of brief behavioral
treatment to decrease insomnia disorder level, which was adapted from
BBTI (Brief Behavioral Treatment of Insomnia) and carried out as online
intervention. The research subject were 4 adults within 20 – 29 years old
age range, with moderate clinical insomnia measured with ISI (Insomnia
Severity Index) in which already adapted in Indonesian language by Jaya
(2012). The research design used was one group pretest-posttest with
analysis within group, in which all subjects received the same treatment,
and the measurement were based from the change in insomnia severity
levels by each subjects. The data analysis method in this research were
non-parametric tests of Wilcoxon Signed Rank Test. The result of
Wilcoxon Signed Rank Test indicates that the brief behavioral treatment
in this research effectively decreased insomnia level as sleep disorder in
each subjects.