2. Child Behavior Checklist (CBCL) 14;15. The CBCL is a written measure designed to assess behavioral and emotional problems in children. There are several forms including a version for children from 1 1/2 to 5 years and a version for children 6-18 years 14;15. There are also Parent, Youth, and Teacher rating forms. The Youth Behavior Rating will be used to obtain a self-report of the child's behavioral and emotional status. Each version yields standard scores (Mean = 50, standard deviation = 10) to assess behavior problems in several specific areas; these scores are also combined into three global scores: an Internalizing score for emotional problems, an Externalizing score for behavior problems, and a Total problem score. The Parent Questionnaire form of the CBCL will be used. The CBCL is expected to take 20 minutes to complete.