Figure 17-6. Dependence of RCD (Rate of Change of Direction) 

 Upon Direction of Travel with Respect to the Axis of the 



Polarizer for D. Pulex. 



NOTE: (A) in polarized light and (B) in unpolarized light. Data was processed 

 by partitioning RCD into disjoint subsets on the basis of the correlated 

 direction of travel. The estimated mean (± the standard error of the mean) for 

 each subset is indicated in the figures. 



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