Figure 2. Diagram representing the experimental outline: flow of the study conducted in the four undergraduate dental clinics.

Note: A mannequin head was set up in a dental chair in one of the unoccupied dental cubicles. Subjects were provided with Card #1 and asked to describe their plan to address the emergency situation. A timer documented the length of time it took for subjects to verbalize the need to deliver oxygen. Once the subject stated the need to provide emergency oxygen, the timer was stopped and he or she was given Card #2. The timer was restarted when the subject and investigator left the cubicle to retrieve the oxygen tank. The time to return to the mannequin was recorded as was the time necessary to operate the valves on the tank, connect the mask to the tank, and place the mask on the mannequin. When the subjects believed they had successfully delivered oxygen to the mannequin, they were asked to state so. This final time, which is the total time taken to find and operate the tank, is shown as the average of each class in Table 4.