Developed instrument to represent knowledge standards in rehabilitation counseling certification/accreditation and identify new knowledge areas. Findings from 1,025 counselors revealed these domains: vocational counseling/consultative services; medical/psychosocial aspects of disability; individual/group counseling; program evaluation/research; case management/service coordination; family, gender, and multicultural issues; foundations of rehabilitation; workers' compensation; environment/attitudinal barriers; and assessment. (Author/NB)