Inclusion Criteria:

• Aged ≥ 18 years of age.
• Clinical diagnosis of insulin dependent presumed autoimmune type 1 diabetes by the site investigator.
• Disease duration of > 1 year.
• Fluent in English (capable of consenting to the study and following task instructions in English).
• Participant understands the ecological momentary assessment and agrees to comply with it to the best of their ability.
• Has 24-hour access to a smart phone with reliable internet access.

Exclusion Criteria:

• Individuals < 18 years of age.
• Unable to complete cognitive assessments due to significant visual, motor or hearing impairment.
• Any medical or psychiatric condition or treatment (via clinic medical records) that is judged by the PIs to interfere with the completion of the study (e.g., active dialysis or chemotherapy, recent myocardial infarction, inpatient psychiatric admission, organ transplant, acute neurological insult, terminal medical condition).
• Clinical diagnosis of dementia based on clinic medical record data.
• Current use of real-time continuous glucose monitoring.
• Unable to complete EMA assessments between 9am – 9pm through the study period (e.g., night shift work, planned travel across time zones, or occupation that does not reliably allow breaks to complete assessments within a reasonable period; e.g., within an hour).