and seat belts in enhancing automobile driver and passenger safety is greater as automobile speed at the time of an accident increases. Three sub-hypotheses will be testedùone in relation to the relative effectiveness of the combined use of air bags and seat belts in enhancing automobile driver and passenger safety compared with each of three forms of passive seat belt systems (refer to the definition of seat belts in this section of the proposal).
The third hypothesis is that the relative effectiveness of the combined use of air bags and seat belts in enhancing automobile driver and passenger safety is greater for adults than for children and infants. Three sub-hypotheses will be testedùone in relation to the relative effectiveness of the combined use of air bags and seat belts in enhancing automobile driver and passenger safety compared with each of three forms of passive seat belt systems (refer to the definition of seat belts in this section of the proposal).
The fourth hypothesis is that the relative effectiveness of the combined use of air bags and seat belts in enhancing automobile driver and passenger safety is lower as the longevity of an unused air bag increases. Three sub-hypotheses will be testedùone in relation to the relative effectiveness of the combined use of air bags and seat belts in enhancing automobile driver and passenger safety compared with each of three forms of passive seat belt systems (refer to the definition of seat belts in this section of the proposal).
The proposed study will not attempt to evaluate the cost-effectiveness of the use of air bags in automobiles. The proposed study will not attempt to evaluate the relative effectiveness of different types of air bag systems. The proposed study will not attempt to evaluate the relative effectiveness of air bags used in conjunction with seat belts that are not passive restraints.
Air bag. An air bag is a passive restraint system consisting ...