After a short delay the subject is presented with a 3x3 array of letters. The array then dissapears and the subject is asked to recall the contents of one of the rows of the array. 48 trials.

The subject is presented with a varying number of colored squares, and has to identify whether or not a circle is part of the set. Press the "/" key if the circle is in the set and the "z" key if it is not. 48 trials.

The subject is presented with a small array of numbers and given a short time to study them. After a delay the subject is presented with a probe and timed on their ability to identify whether it was or was not part of the set. Press the "/" key if the probe was in the set and the "z" key if it is not.