“…Priming sadness or fear in easy and moderately difficult tasks leads to stronger effort‐related responses in the cardiovascular system than priming happiness or anger (e.g., Chatelain & Gendolla, ; Framorando & Gendolla, ; Gendolla & Silvestrini, ; Lasauskaite, Gendolla, & Silvestrini, ). By contrast, when people work on objectively difficult tasks, these affect prime effects are inversed: Happiness and anger primes generate stronger cardiovascular reactivity than sadness and fear primes (e.g., Chatelain, Silvestrini, & Gendolla, ; Framorando & Gendolla, ; Freydefont, Gendolla, & Silvestrini, ; Lasauskaite Schüpbach, Gendolla, & Silvestrini, ; Silvestrini & Gendolla, ; see also Blanchfield, Hardy, & Marcora, ; Silvestrini, ). This is because people use all available information to comply with the resource conservation principle.…”