Fig. 2.

The cost of switching spatial attention decreases with interdigit delay but is always positive. Moreover, the cost of switching tends to be greater when voice quality is fixed between digits (Exp. 2) (Lower) than when the voice changes between digits (Exp. 1) (Upper), especially at short interdigit delays. Each plot shows the across-subject mean difference in performance (±SEM) between condition F and each of the conditions SS (circles and dotted lines) and SL (triangles and dashed lines).