Part I: Understanding Trauma in Youths and the Issues Related to its Assessment. The Effects of Extreme Stress: Traumatic Reactions in Children and Adolexcents. The Neurobiology of Childhood Trauma. The Complexity of Associations. The Nature of Assessment. Risk and Resilience Factors: Trauma's Mediator, Moderator, or Outcome Variables. Part II: Aspects of the Youth and His or Her Environment: Their Assessment and/or Influence on the Assessment of Trauma. The Nature of the Child. Culture and Family Background. Attachment. Part III: Methods and Measures for Assessing Trauma in Youths. Interviewing Youths Following Traumatic Events. The Nature of the Event: Assessing Exposure Levels and Complicated Reactions. Self-reports of Trauma Symptoms: School Age Children and Adolescents. The Use of Projective Tests in the Evaluation of Childhood Trauma. Adult Reports: Parent, Teacher, and Clinician Reports of Trauma. Part IV: Assessing Additional Trauma Symptoms. The Integration of Information Following Traumas: Understanding and Assessing Information Processing and Dissociation. The Assessment of Post-trauma Comorbidity and Behavioral Symptoms. Part V: Pulling it All Together. Writing Reports Regarding Traumatized Youths. An Afterword: Some Conclusions About Assessing Trauma in Youths.