2017-08-19

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Letter To The Editor: Optical Illusion

Author:George Vayakis, Issue: June 2003, Topic: Letters To Or From The Editor

I read the article A Valuable Driving Lesson (AT March 2003) with great interest, especially this bit:

What they found is quite amazing. You are more likely to notice cars that you are not likely to hit. And the inverse: you are less likely to notice cars that you are more likely to hit...

This phenomenon is known well to anybody who sails. If you go on a sailing course you are taught that, in order to assess the risk of collision, whether visually or by radar, you look for any object that is at a constant bearing (angle) to the direction of your travel. This object 50 % likely to collide with you (depending on whether it is going away or towards you), whatever its speed. This applies to ships, but also buoys and islands! Since, as far as motion goes, the eye is not sensitive to speed but rather to change of angle, it follows that everything you are due to collide with appears still... I think this proves the researchers are not amateur sailors - a rarity in Japan despite all the sea around it.

<< One day in JARI | Master Index | Getting a Japanese Drivers License from Scratch >>


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