The increase in stimulation intensity from run 1 to run 4 that was required to induce comparable intensity levels of pain did not reach statistical significance (as revealed by a repeated measures ANOVA testing one within-subject factor STIMULATION INTENSITY with four levels (run 1–4): F(3,33) = 3.85; p = 0.069).
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Dissociable neural mechanisms underlying the modulation of pain and anxiety? An FMRI pilot study.
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