The effectiveness of a conflict resolution training program was examined in
an American midwestern suburban elementary school. Participants were 80 ki
ndergartners randomly assigned to an Experimental or control condition in m
orning or afternoon time blocks. Children in the experimental condition rec
eived 9 hr of conflict resolution training integrated into a curriculum uni
t on friendship taught daily for 4 consecutive weeks. Children in the contr
ol condition were taught the identical friendship unit for the same period
of time without conflict resolution training. Teachers rotated equally acro
ss conditions. Significant differences between trained and untrained childr
en occurred in their knowledge and retention of the conflict resolution pro
cedure, willingness and ability to use the procedure in conflict situations
, and conceptual understanding of friendship.