The WCST demonstrated that Katherine is presently unable to infer any matching rule from three possibilities (number, color, form) from a large number of trails ( 394 trials were used). This establishes an analytical baseline from which to proceed to the next stage. As a reference point, the WCST was administered to two normal subjects first and it demonstrated that a normal subject could easily infer the sorting principle with only a few trials, often only 2.

Not only was she unable to infer a sorting principle, she always reverted to sorting according to number . Even providing tonal clues brought about no improvement in results, The test was halted several times to ask her what she thought the sorting principle was to see if there was some confusion. Her answers were uncorrelated to the principle in effect at the time that she was asked to explain her decisions.

The next exercise will be to administer an analog version of the WCST using a tennis drill. If she can infer the principle from clues, we will then re administer the WCST to see if there is some level of carryover.

The physical test will be constructed using the figure below:

A ball feeder will decide on a matching principle based on the three colors in the figures above (numbers are specifically excluded). He/she will then feed balls and Katherine will be allowed to hit to any color to acquire information about the "right" color the feeder has in mind. If she is correct the feeder will say:yes" or "right" If she is wrong the feeder will say "wrong" or "no". when she makes ten successful inferences in a row, the feeder will change the "matching principle target" without telling her and she will have to infer the new target from trials...

Katherine is a very skilled athlete and will have no trouble hitting a ball to any given target. Consequently, we can infer t hat her motor systems represent very powerful computers as demonstrated by her many national tennis awards.