Development of Brief Positive Affect Treatment (PAT) for Caregivers of Patients With Advanced Cancer

Inclusion Criteria: * Provision of signed and dated informed consent form * Stated willingness to comply with all study procedures and availability for the duration of the study * Males and female adults ≥18 years * Able to read and speak English * Caregiver of a patient diagnosed with stage IV solid malignancy, with whom they have been residing for \>6 months * Access to necessary resources for participating in a technology-based intervention (i.e., telephone, internet access) Exclusion Criteria: * Current participation in consistent (self-defined) psychotherapy * Caregivers who are considered part of a vulnerable population (i.e. cognitively impaired (self-reported or patient-reported), pregnant, military personnel) will not be eligible.