“…Somewhat more surprising than the absent effect of unpredictability, was the absent effect of punishment intensity across the predictable conditions. Past studies have repeatedly reported a potentiation of ERN amplitudes as a consequence to the enhancement of the motivational significance of errors, for instance, by making correct responses more attractive and/or by making incorrect responses more aversive (e.g., by using secondary reinforcers such as monetary gains/losses: Boksem, Tops, Kostermans, & De Cremer, 2008;Endrass et al, 2010;Hajcak, Moser, Yeung, & Simons, 2005;Maruo, Schacht, Sommer, & Masaki, 2016;Maruo, Sommer, & Masaki, 2017;Pailing & Segalowitz, 2004;Potts, 2011;Stürmer, Nigbur, Schacht, & Sommer, 2011; or by using primary reinforcers such as loud noises: de Bruijn, Jansen, & Overgaauw, 2020; Pasion, Paiva, Fernandes, Almeida, & Barbosa, 2018;Riesel et al, 2012;Riesel, Kathmann, Wüllhorst et al, 2019; or electrical stimulation: Meyer & Gawlowska, 2017).…”