Control Intervention A commercially available video on
use of hearing protection was used as the control intervention.
The research team reviewed a number of videos
highly rated by the National Hearing Conservation Association
(Kerst & Langman, 2000). Criteria set for selecting
the video required that it
• provide required OSHA-mandated information on
hearing protection
• had not previously been used in the factory
• did not emphasize the theoretically specified predictors
used for the experimental interventions
Written permission was obtained from the publisher to
digitize the video so that it would be delivered in the same
manner on computer as the experimental interventions.