The purpose of this research were to; compare honest behaviors of experimental group students using
the guidance activities package to develop honest behaviors and control group students using other guidance
activities; compare honest behaviors of experimental group students with different levels of future-orientation and
self-control characteristics and different bio-social backgrounds. The research sample consisted of 60 Mathayom
Suksa II students in two intact classrooms of Chiang Rai Municipality 6 School, Chiang Rai Province in the 2010
academic year, obtained by cluster sampling. The two classrooms were then randomly assigned to be experimental
and control group, each of which consisted of 30 students. The employed research instruments comprised a
questionnaire on bio-social backgrounds; a scale to assess honest behaviors with reliability coefficient of .84; and a
scale to assess the future orientation and self-control characteristics with reliability coefficient of .86; a guidance