Time-frequency representations of stimulus-related activity in selected sensors as a function of expectation and attention.

<p><b><i>A,</i></b> When participants were attending to the first tone in each tone pair, there was more beta band activity in trials where temporal expectation was distributed (left panel) than when it was focal (middle). Rectangles represent spectrotemporal clusters where a significant interaction of expectation and attention was found (right). <b><i>B,</i></b> When participants were attending to the second tone in each tone pair, there was no difference in beta band activity in trials where temporal expectation was distributed (left panel) than when it was focal (middle). Rectangles represent spectrotemporal clusters where a significant interaction of expectation and attention was found (right). <b><i>C,</i></b> Interaction between expectation and attention during pre-stimulus activity (the leftmost cluster in <b><i>A</i></b> and <b><i>B)</i></b> and post-stimulus activity (the middle cluster). <b><i>D,</i></b> Source reconstruction of the beta-band interaction between temporal expectation and attention.