Inclusion Criteria for TBI participant:
* Mild, moderate, or severe TBI determined by The Ohio State University Traumatic Brain Injury Identification Method (OSU TBI-ID) during Time 1; if mild, must have been at least dazed and confused. Must be ≥ 1-year post-TBI (unlikely spontaneous recovery). Must have a care-partner (CP) willing to participate. Must either have a ≤ 45 T score on any one of the SASNOS Interpersonal Behavior subscales or Total Interpersonal behavior score, OR select never, rarely, or occasionally to #2, #6, #7, and/ or #12 (obtained during screening process). Also, either: A) Must be believed by person with TBI OR B) Person with TBI has been told by others OR CP, that their problems with recognizing and/ or empathizing with others' emotions (self or CP rated) are believed to be new or worse since TBI and impacting their interpersonal behaviors or relationships.
Inclusion Criteria for CP:
* Must be a relative, spouse, or friend who believes the have sufficient interactions (\~3 times/ week) with the participant with TBI to judge their empathic, interpersonal, and other behaviors. Must be willing to participate in assessments and empathy sessions.
Inclusion Criteria for both TBI and CP:
* Must be ≥18 years old. Must be a U.S. resident (exclusion for California residents). Must be proficient in English; have basic comprehension \& ability to follow directions (determined via interaction at screening); have access to a computer or tablet with reliable internet (capacity for video conferencing) with video-conferencing capability.
Exclusion Criteria for TBI participant:
* Any other formal neurological disorder or condition that impacts emotional functioning other than TBI (e.g., stroke); suicide risk determined to be \>low risk based on PI discretion and/or results of suicide protocol (if triggered); unstable or anticipated medication changes that will influence mood/ affect during study participation; and individuals who recently started psychotherapy (e.g., \< 3 months ago) and/or active treatment in family or couples therapy.
Exclusion Criteria for CP:
* Moderate to severe TBI determined by the "OSU TBI-ID + ABI" (i.e., scoring a 4 or 5 on Worst Injury Scale); If the person indicates a mild TBI (OSU score of 2 or 3) or any other neurological impairment on the OSU (e.g. a stroke), then the person will be asked follow-up questions to determine if there were any persistent changes in thinking, memory, mood, social functioning that they believe was a result of the injury. PI and/ or Co-PI discretion will be used to evaluate the answer and determine inclusion or exclusion.
Exclusion Criteria for both TBI and CP:
* Developmental; neurodegenerative; major psychiatric disorder (e.g., schizophrenia, personality disorder); visual, hearing, or communication deficits that would impede participation; participation in IRB#12561; contemplating separation or divorce with the dyad partner
