Family members can testify about observations and impacts but face credibility scrutiny due to bias. Their testimony covers daily activity changes, pain expressions, and relationship effects. Before-and-after comparisons provide valuable context. Family witnesses cannot offer medical opinions without expertise. Cross-examination explores financial interests and loyalty bias. Multiple family witnesses may appear cumulative. Non-family witnesses provide balance. Video evidence showing family interactions supports testimony. Preparation should acknowledge relationships while emphasizing truthfulness. Family testimony particularly helps with consortium claims and non-economic damages. Courts don’t exclude family testimony solely for relationships but consider bias in weighing evidence.