The authors of this paper would like to point out an error in the above manuscript. This error is detailed below: In the third paragraph, the following text appears: "The test subject reads a series of numbers in right-to-left and up-to-down order on three test cards." This should read: "The test subject reads a series of numbers in left-to-right and up-to-down order on three test cards." The authors apologize for this error.
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