Consistency of same- and opposite-hemifield RT oscillation pulses across individual subjects. A: phase of 13- to 20-Hz oscillations for each subject. Phase was largely consistent across subjects during the initial same-hemifield RT pulse of Fig. 5A, C, but it was inconsistent later. B: phase-locking value (PLV; see materials and methods) of the phase traces shown in A. The shaded region shows the interval with significant PLV (P < 0.05; see materials and methods), which was consistent with the early pulse in Fig. 5, A and C. Thus the results in Fig. 5, A and C, were reliable across individual subjects. C: similar analyses but for opposite hemifield trials. Once again, phase was consistent across individuals but only in the late period in which the opposite-hemifield RT oscillation pulse occurred in Fig. 5, D and F; also see D. Thus the opposite-hemifield RT oscillation pulse in Fig. 5, D and F, was consistently observed across individual subjects. D: same as in B but for the data in C.