Authors: F Thoss B Bartsch
Publish Date: 2003/08/27
Volume: 189, Issue: 10, Pages: 777-779
Abstract
Completing our investigations concerning influences of weak magnetic fields on the visual discrimination threshold we have investigated 30 subjects 20 female 10 male under rotation of the geomagnetic field without change in field strength We related the thresholds to the values measured in the unchanged field Comparison with a control experiment shows that correspondence between viewing and field direction results in a significant decrease of the threshold The significance is lost if the angle between the directions is set to 20° On the basis of these and our earlier results an attempt is made to give a very simple description of the connection between field direction field strength and the change in the visual discrimination thresholdWe thank Professor Wolfgang Wiltschko for his suggestions Ms Ursula Lang for technical assistance and Dr Michael Thoss for many discussions We are most grateful to Professor Stephen E Smith for his valuable advice and for revising the manuscript
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