Inclusion Criteria:

• are ≥60 years old (all cohorts)
• have pathologically confirmed, relapsed refractory lymphoid malignancy or plasma cell disorder receiving a commercial CAR T-cell product (all cohorts)
• able to speak and understand English (cohort 1 only)

Exclusion Criteria:

• Any prior commercial or investigational CAR T therapy (all cohorts)
• Current diagnosis of major Axis I psychiatric disorder (DSM-IV), major depression, bipolar disorder, or schizophrenia, as per medical records or patient report (cohort 1 only)
• History of a neurological disorder, neurodegenerative disease, or traumatic brain injury with loss of consciousness (>60 minutes), as per medical records or patient report (cohort 1 only)
• Current ongoing substance abuse and/or history of substance abuse, as per medical records or patient report (cohort 1 only)