STATE Trial: SusTained Attention Training to Enhance Sleep - Remote

Inclusion Criteria: * Participant must be 55 years of age or older. * Participant must meet criteria for clinical insomnia - moderate severity based on the Insomnia Severity Index. * Participant must be a fluent English speaker. * Participant must have adequate visual, auditory, and motor capacity to use computerized intervention. * Participant must have a computer and access to the Internet. Exclusion Criteria: * Participants with untreated psychiatric conditions, including substance abuse/dependence disorders, untreated obstructive sleep apnea, diagnosis of other sleep disorders (e.g., restless legs syndrome), recent hospitalization, ongoing chemotherapy or other cancer treatment, and concurrent engagement in another insomnia treatment. * Participants enrolled in another concurrent research study. * Participants using computer-based cognitive training programs or has used them within a month of the consent date.