Description of the Techniques Used in Social Skills Training Program: The social skills training program was based on the modules developed by Bellack et al. [32] and Liberman et al. [33]. The training program was divided into two parts:conversational skills and assertiveness skills. The conversational skills training included both verbal and nonverbal communication skills and the following exercises were employed in this order: explanation, demonstration, role play, feedback, reinforcement and homework exercise.