This paper examines the inter-rater reliability of 148 persons with tr
aumatic brain injury (PwTBI) and their significant others (SO) on the
Functional Independence Measure (FIM), and the Community Integration Q
uestionnaire (CIQ). Results reveal that agreement differs across instr
uments and subscales, with greatest response comparability on the prod
uctivity CIQ subscale, followed by the motor FIM, social integration C
IQ, cognitive FIM, and home integration CIQ. These findings have impor
tant implications for the future of TBI outcomes studies.