A transport research team investigated the effect of cockpit display configurations on pilots' reaction times using a repeated measures design.
In one condition (the 'HUD-On' condition), pilots had to detect flight path obstacles on a simulator screen while using a fully functional Head-Up Display.
In a second condition (the 'HUD-Off' condition), the same pilots had to detect flight path obstacles on the simulator screen with the Head-Up Display deactivated, forcing them to rely entirely on head-down instrument panels.
The researchers recorded the reaction time (in milliseconds) of each pilot to successfully detect the obstacle in both conditions.
In experiments using repeated measures designs, researchers often use counterbalancing.
Explain how the researcher might have used counterbalancing in this study.
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