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Paradigm and Difference Waveform (DW). c) LVF Target DWpleasant was created by subtracting b) ERPs to Pleasant IAPS stimuli presented alone from a) ERPs to Pleasant IAPS stimuli (150ms) followed by a subsequent target at 350ms. LVF Target DWpleasant reflects brain's response to LVF targets in the context of pleasant stimuli without the superimposed response to complex visual IAPS stimuli. The other DWs presented in Figure 4 were created in the same manner.
