This paper presents three auditory rating experiments on the rise-fall-rise contour (RFR). Experiment 1 provides experimental evidence that the RFR makes disagreeing with a prior statement more natural than neutral intonation would. Additionally, the data show that the RFR exhibits a valence asymmetry, noted by Göbel (2019): the amelioration of a disagreement is greater when the RFR is used in a positive reply to a negative statement than in a negative reply to a positive statement. Experiments 2 and 3 investigate factors contributing to this asymmetry, showing that it disappears in replies to questions and is weakened when the reply contains an additive particle. Based on these results, we argue that the RFR has a scalar meaning, following Göbel (2019), with the relevant scale being contextually determined and resulting in an ambiguity resembling the Focus-particle at least.