Abstract
Motorcycle helmets have been proven to be very effective in reducing or preventing head injuries in accidents. For full protection, the helmet must be secured on the wearer's head. This is accomplished by the use of a strap under the wearer's jaw. These retention straps are secured by different devices which have different methods of fastening. Experiments were conducted with the three most common fastening devices on thirty-two subjects to determine measures of fastening and unfastening speed, tightness and the effect of instructions. Mixed ANOVA shows main effects of gender and fastener type as well as interactive effects. No effects were found for instructions. Subjects preferred the buckle-type fastener over slide-bar over D-ring devices.
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