Inclusion Criteria:  all children for whom parental informed consent is provided child age between 4.5-6.5 years at the time of participant recruitment children classified at risk for externalizing problems, based on their score (cutoff T > 67) on the Externalizing Problems scale from the CBCL, and C-TRF respectively (for statistical analyses in relation to the indicated intervention)  Exclusion Criteria:  previous child participation in a program designed to enhance social-emotional skills and/or parent participation to another parent training program child's age below 4.5 years or over 6.5 years at the time of participant recruitment children classified not at risk based on their score (cutoff T < 67) on the Externalizing Problems scale from the CBCL, and C-TRF respectively (for statistical analyses in relation to the indicated intervention)