Chapter 5 – Experimental fear 171 trials) being significantly different between groups (High-pain vs. Control) (F (1,46) = 4.24, P = 0.04, ηp 2 = 0.09). We ran repeatedmeasures ANOVAs separately for the High-pain and Control groups, confirming that nocebo responses (i.e., nocebo vs. control trials) in the Control group were not significant (F (1,23) = 1.42, P = 0.25, ηp 2 = 0.08), whereas nocebo responses in the High-pain group were significant at the end of extinction (F (1,23) = 18.59, P < 0.001, ηp 2 = 0.45). High-threat group Nocebo responses (i.e., nocebo vs. control trials) at the end of extinction were not significantly different between the High-threat and Control groups (F (1,46) = 0.002, P = 0.98, ηp 2 < 0.001) (Figure 5b).
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