A Specific Aptitude Test Battery (SATB) for Respiratory Therapist was developed by the U.S. Employment Service (USES). The technical adequacy of research, fairness to minorities, and usefulness of the battery to Employment Service staff and employers in selecting individuals for training in respiratory therapist positions were examined. Research demonstrated a statistically significant and useful relationship between proficiency as respiratory therapists and SATB aptitudes of general learning ability, spatial aptitude, form perception, and motor coordination. The validation sample consisted of 496 employed workers (including 99 blacks) from 17 states and the District of Columbia. The SATB was found to be fair to Blacks, Hispanics, and non-minorities and to males and females, using several definitions of fairness. Job performance data were collected during 1972-81 using supervisory ratings. The job analysis procedure, experimental General Aptitude Test Battery (GATB), validation sample description, and criterion-related validity for the study are explored. A sample Descriptive Rating Scale and respiratory analyst job description are included. Work performed includes record keeping, therapy procedures, equipment care, and other duties. (CM)