In its attempts to apply behavior modification principles to teaching job-required behaviors to manpower trainees, the Mobilization for Youth-Experimental Manpower Laboratory (MFY-EML), has mounted a number of reinforcement-based Neighborhood Youth Corps training programs. The nature, magnitude and scheduling of reinforcers, the nature of the behaviors to be taught, and the practical constraints inherent in the natural training setting all posed profound problems to overcome. This "antipaper" is an explication of these types of problems that were encountered in extrapolating reinforcement principles to the manpower training setting. Written for the professional behavioral modifier, an ensuing recommendation is that the academic research laboratory be more responsive to roadblocks encountered in field applications and investigate them systematically so as to facilitate the continual refinement of field practice. (Author)