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Frequency band of interest. Interpersonal brain synchronization (IBS) indicated by wavelet transform coherence (WTC). The coherence based on raw HbO signal from channel 20 (CH20) in a representative pair of lovers. The red border represents the frequency band of interest (3.2 s – 12.8 s), indicating when the task was carried out. The color bar denotes the value of WTC (1 = highest coherence, 0 = lowest coherence). [Color figure can be viewed at http://wileyonlinelibrary.com]
