ABSTRACT
FIG. 15.-{From D. Starch, Psych. Monog., 1905, I (4), p. 10. Cf. Seashore, Elem. Experimts. in Psych., 1908, p. 60). The black line shows the number of degrees displacement (I, 2, 3,4,5) required for 75% right judgments as to displacement of the source of sound at a general distance of I metre from the head.
