The Trajectory of Truth: A Longitudinal Study of the Illusory Truth Effect

Repeated statements are rated as subjectively truer than comparable new statements, even though repetition alone provides no new, probative information (the illusory truth effect). Contrary to some theoretical predictions, the illusory effect seems be similar in magnitude for repetitions occurring after minutes or weeks. This Registered Report describes a longitudinal investigation of (n = 608, n 567 analysed) which we systematically manipulated intersession interval (immediately, one day, week, and month) order test whether is immune time. Both our hypotheses were supported: We observed an at all four intervals (overall effect: ?2(1) 169.91; Mrepeated 4.52, Mnew 4.14; H1), with diminishing delay increased (H2). False repeated over short timescales might have greater on judgements longer timescales. Researchers should consider implications choice when designing future research.