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Manipulation check.

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posted on 13.11.2013 by Stacey M. Schaefer, Jennifer Morozink Boylan, Carien M. van Reekum, Regina C. Lapate, Catherine J. Norris, Carol D. Ryff, Richard J. Davidson

Emotion modulation was observed in the EBR measures with a significant main effect of valence: EBR magnitude was greater on negative compared to both neutral and positive trials across probe times. A main effect of probe time showed larger EBR magnitude across valences in response to the recovery probe after picture offset when the computer screen was black than to the reactivity probe during the picture presentation (consistent with findings of larger responses to startling stimuli in darkness than in light). Mean EBR magnitude was significantly greater on negative than both neutral and positive trials at the reactivity probe, and greater on negative than positive trials at the recovery probe.

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