“…However, it is not impossible that native Spanish speakers’ rounding of these vowels (revealed by the third formant, F3) differed from that implemented by native French speakers, and adding this cue in the accuracy measure would have increased the strength of the perception–production relationship (see Llompart & Reinisch, 2018, for work on the role of acoustic cues in L2 perception). To examine this possibility and the role of F3 in the production of this novel contrast, we ran a series of analyses (available in the project's OSF profile at https://osf.io/usrdw, see also Kartushina et al., 2022a), that revealed: (a) no difference in F3 between Spanish and native French groups, nor interaction between group and vowel, (b) no correlation between the F3‐distance to the norms (participants’ F3 and native French speakers’ F3) and the confidence rating, and (c) no correlation between the F3‐distance to the norms and participants’ identification accuracy for either vowel. These additional analyses suggested that, similar to native speakers of French, Spanish participants did not use F3, a roundness cue, to distinguish between the two French vowels and that the accuracy in F3 (alone) was not related to the participants’ contrast perception.…”