TABLE VIII

Obs.	Sing. Tact	Sing. Vis.	Tact. and Vis.	Two Tact.	Two Vis.	Two Tact. and Two Vis.
A Number of series averaged	6	6	6	6	6	6
Per cent Correct Judgments	87	88	83	9	81	83

The next additional combination was a pair of judgments based upon auditory stimuli. Four electric clickers were placed on the wall behind the observer. Two were loud and two faint. Each pair was accurately adjusted so they were of the same intensity and quality. One of each pair, i. e., one loud and one faint, were hung about four feet to the left of the observer's median plane. The other two were hung at an equal distance to the right of this plane. The circuit making the click was made by a switch closed by the pendulum as it fell. The experimenter by pressing any one of four buttons gave the one of the clicks he desired. The observer's two judgments were as to the loudness and the position of the click.