Using Two of the Senses
There are times when the ability to use two of the senses with reasonable accuracy at the same time will be of value. It is not possible for either of the senses to produce perfect attention while working in conjunction with one another. We can attend to only one thing at a time and do it well, but "Divided Attention" is possible. Under the chapter on Attention and Concentration, on page 75, you will find an explanation of "Divided Attention," which should be read before going farther with these exercises.