A research study is described into the impact on Adult ego state and emotional stability of 36 adolescent students (with 36 in a control group) of a training programme based on transactional analysis concepts run in a school in Damascus. An experimental battery of instruments comprised existing and new instruments including an Ego-State Wheel, an Ego State Problem-Solving Scale, an Ego State Measure, the Emotional Stability Brief Measure, and the Geneva Emotion Wheel. Results showed differences in Adult and Free Child ego states and emotional stability, and some differences between boys and girls on Nurturing Parent and Adapted Child ego states.