Two groups of EFL learners participated in the experiment. These were the same individuals who participated in our earlier perceptual assimilation experiment (Afshar, Van Heuven, 2022, summarized in section 1). Due to equipment failure or incorrect task performance a few of these participants had to be omitted from further analysis. As a result of this, the monolingual group was comprised of 21 native speakers of Modern Persian (10 male, 11 female). They were secondary school pupils in Tehran with a mean exposure to (American) English of roughly 6 years in a school setting. The second group consisted of 24 early bilingual listeners (11 male, 13 female) with Azerbaijani and Persian as their first two languages (see Afshar, 2022: Chapters 3 and 4 for more explanation on their language background). The bilinguals were comparable to the monolinguals in all relevant aspects (age, exposure to English, level of education). They were tested in secondary schools in the city of Marand in the East Azerbaijan Province in the North-West of Iran.