Tipping the Scales of Psychological Reactance: A Closer Look at Imperative Language and the Role of Epistemic Certainty

Psychological reactance is a key construct in persuasion, but experimental inductions often confound imperative language with epistemically certain language (i.e., language that belies grounds for doubt). Two online experiments examine the effects of each language type on indicators of psychological reactance across two scientific contexts. In Study 1 (N = 274), imperative language increased felt anger and perceived threat to freedom, while epistemically certain language did not. In Study 2 (N = 402), epistemically uncertain language attenuated felt anger and perceived threat to freedom. Findings offer theoretical and practical insight into the effects of each language type on resistance to persuasion.