Costello Syndrome

Background: RASopathies are a group of genetic diseases that affect a child s development. They cause physical, cognitive, and behavioral symptoms. Caring for a child with a RASopathy can be stressful. Acceptance and Commitment Therapy (ACT) is a therapy that helps people become more aware and accepting of difficult thoughts and feelings. ACT has been found to be helpful for parents with high parenting stress. Objective: To find out if Acceptance and Commitment Therapy (ACT) can help caregivers of children with a RASopathy better cope with parenting stress. Eligibility: People aged 18 years or older who care for a child (younger than 18 years) with a RASopathy. The child must live with the caregiver at least 50% of the time. Design: The study is fully remote. Participants need a mobile device that can play audio and video and connect to the internet. They can borrow an iPod if needed. Participants will download a free app called MetricWire. They will use this app to watch videos and answer questions. The first 8 participants will be in a pilot study. They will receive the ACT intervention starting the first week after they begin the study. After the pilot study, we will s