“…This might mean, for instance, that certain methods designed to specifically alter individuals’ reactivity to negative stimuli (e.g., treatment of phobias) could, if too broadly applied, potentially change their sensitivity to emotionally evocative stimuli more generally, including positive events (e.g., causing them to feel less joy at a wedding). It is interesting that such diminished evaluation sensitivity could also presumably cause people to feel less conflicted, indecisive, or uncomfortable when they experience ambivalence toward individuals or experiences that elicit both negative and positive reactions (e.g., Priester & Petty, 1996; Rydell & Durso, 2012). Identifying the stage in evaluative processing that acetaminophen is affecting will be an important area for investigation in order to determine whether acetaminophen is altering evaluative processing itself or the perceived inputs or outputs to this process.…”