Eligibility Criteria:
Inclusion Criteria:
* Women ages 65-90
* Chemotherapy treatment for early-stage (I, IIa, IIb, IIIa) breast cancer
* Post-menopausal
* High school education or greater
* Geographically available for followup assessment
* Native English speaker
* Normal or corrected to near-normal hearing and vision
Exclusion Criteria:
* Psychiatric history including past or current psychotic spectrum disorders (schizophrenia, bipolar disorder, major depressive disorder, dementia, schizoaffective disorder)
* Brain injury (e.g., stroke, heart attack, aneurysm, tumor, concussion, head trauma)
* Brain disease
* History of brain irradiation or surgery
* Current or past disease/disorder of the central nervous system or medical condition affecting cognitive functioning (e.g., chronic migraine, epilepsy or history of seizures, encephalitis, meningitis, multiple sclerosis, thyroid condition, Parkinson's, Alzheimer's, Huntington's disease)
* Active diagnosis of autoimmune or inflammatory disorder (e.g., systemic lupus erythematosus, rheumatoid arthritis, vasculitis, insulin-dependent diabetes, Crohn's disease, uncontrolled allergic reaction or asthma)
* History of other cancer, except for basal cell carcinoma
* Development of a second primary malignancy during the study
* Drug or alcohol abuse (i.e., more than 7 drinks per week)
* Chronic use of oral steroid medication
* Former (prior to early-stage breast cancer) intrathecal therapy, radiation therapy, chemotherapy, or any neoadjuvant chemotherapy
* Acquired or developmental speech, language, or learning disorders (e.g., aphasia, dyslexia, dysgraphia, auditory processing disorder, autism, developmental delay)
* Hormone replacement therapy, excluding vaginal estrogen