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If you have been asked to evaluate the response time of a driver who was in a crash, can you answer the following questions? If not, you may want to attend our next class.
1. Perception-reaction time starts___________ and ends _______________.
Are you sure the research was conducted in the same time frames?
2. True or False. Research has established that 1.5 seconds is the standard reaction time for drivers in most situations?
Do you react the same to happy and sad movies? To nice and mean people? Then why would all drivers respond the same to all situations, such a premise is without scientific merit.
3. If five different studies measured the daytime response times to path intrusion situations and the resulting response times range from 0.6 to 1.9 seconds, which study should I use and which number is best.
They all are likely good studies but because they involved different methodologies, they came to different results. The key is to understand how response times change due to changes in methodology and make appropriate adjustment to the results of the studies to compare to your crash scenario.
4. Since we do not have an EEG read out from the driver at the time of the crash, how do you determine when “perception” occurred?
We never want to be accused of trying to read minds, therefore, it is always best to start the response time clock from a known landmark, we will explain how.
5. A driver is in the left lane on a road with a raised median divider, a car intrudes into his path from his right; the crash can be avoided by swerving left or right. Which response choice is this driver likely going make?
This driver will likely brake, we will explain why.
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