 The investigators have developed a parent social-cognitive processing intervention P-SCIP to help decrease distress among parent caregivers of children undergoing hematopoietic stem cell transplant HSCT. The investigators will evaluate the efficacy of P-SCIP in reducing short- and long-term distress and parenting stress among 300 parents of children undergoing HSCT. P-SCIP will be delivered during the childs inpatient HSCT hospitalization and is specifically designed to improve parent social e.g., sharing concerns and cognitive e.g., acceptance processing of the transplant experience. The intervention includes five in-person sessions that are accompanied by an interactive CD-ROM. The CD-ROM complements the materials in the in-person sessions and provides parents with the opportunity to enhance and deepen their cognitive and social processing of the HSCT experience. The intervention will be tested against best-practices psychosocial care BPC available in four enriched pediatric HSCT settings across the United States. P-SCIP will be provided to both Spanish- and English-speaking parents. Participants will complete measures of psychological distress, well-being, and social and cognitive processing at the time of HSCT, two, six and twelve months after HSCT. Research questions will address the effects of P-SCIP versus BPC on parent psychological adaptation and social and cognitive processing, as well as evaluate parent personal resources as well as child medical course variables that contribute to intervention response. The investigators will also examine barriers to participation in the intervention by comparing barriers to participation among parents who refuse participation in the trial and parents who accept. 