No evidence for convergence to sub-phonemic F2 shifts in shadowing

Abstract

Over the course of a conversation, interlocutors sound more and more like each other in a process called convergence. However, the automaticity and grainsize of convergence are not well established. This study therefore examined whether female native Dutch speakers converge to large yet sub-phonemic shifts in the F2 of the vowel/e/. Participants first performed a short reading task to establish baseline F2s for the vowel/e/, then shadowed 120 target words (alongside 360 fillers) which contained one instance of a manipulated vowel/e/where the F2 had been shifted down to that of the vowel/ø/. Consistent exposure to large (sub-phonemic) downward shifts in F2 did not result in convergence. The results raise issues for theories which view convergence as a product of automatic integration between perception and production.