Figure 1.

Posner cueing task and epoch definition. A fixation cross was presented for 1,500 (±50) ms, followed by a cue (green bar) presented in the left or right visual hemifield for 100 ms. After 200 ms, the target stimulus (box with opening) appeared in either the left or right visual hemifield for 2,500 ms. Participants responded as to whether the opening was on the bottom or top of the target with their index and middle fingers, respectively. The cue was valid (presented on the same side as the subsequent target) 50% of the time. To evaluate the responses involved in attentional reorientation (cue‐locked), the neuromagnetic data were defined with the onset of the cue as 0 ms (denoted in red) and the baseline was defined as the 600 ms preceding cue onset. To evaluate motor responses (movement‐locked), the data were defined with movement onset as 0 ms (denoted in blue) and the baseline was defined as a 600 ms period prior to movement (and prior to the cue onset) that was individually adjusted based on reaction time [Color figure can be viewed at http://wileyonlinelibrary.com]