Figure 4. OxyHb changes from the last familiarization block to the first test block (Studies 2 and 3).

A. When the 2-minute pause was filled with music, channels in both hemispheres showed a decrement in the concentration of oxyHb from the familiarization to the test in the Same-word condition, and an increment in the Novel-word condition. B. There were no significant changes in oxyHb concentration from the familiarization to the test phases when the interval was filled with speech stimuli.