The purpose of this study was to determine the effectiveness of positive learning on happiness, Aggression and hope
for adolescents with leukemia in Ahvaz. The sample consisted of 30 people who were selected by available
sampling method. 15 subjects in the experimental group and 15 in the control group were randomly assigned. The
experimental design was a pre-test-post-test type with control group and follow-up period. Measurement tools
included Oxford Happiness Inventory (Argyle, 1989); Ahwaz's Aggression Questionnaire (Zahedifar, Najarian, and
Shokrkon, 2000); Hope Scale (Schneider, 1991). To run, at first, the pre-test was taken from both groups. Then, the
experimental group was trained in 14 sessions of 90 minutes, and after each group, they were subjected to post-test.
And one month later, the follow-up process was completed. Data analysis was performed using multivariate
covariance analysis (MANCOVA) and one-way analysis of covariance (ANCOVA). The results showed that
positive attitudes toward happiness, aggressiveness and hopefulness of adolescents with leukemia in Ahvaz were
effective.