“…In the last decade, there has also been growing controversy around the claims of the bilingual advantage with an increasing number of studies showing null results (e.g., Duñabeitia, Hernandez, Anton, et al, 2014;Paap & Greenberg, 2013;Paap, Johnson & Sawi, 2014). Factors such as immigration status (Kousaie & Phillips, 2012), language history, socioeconomic status (Naeem, Filippi, Periche-Tomas, Papageorgiou & Bright, 2018;Morton & Harper, 2007), intelligence and culture (Yang, Yang, & Lust, 2011) which were not always included in earlier studies have been cited as having potentially confounding effects (Lehtonen et al, 2018). In their meta-analysis of results from non-verbal interference tasks, Hilchey and Klein (2011) found that bilingual advantages in executive control tend to occur in studies with small samples while null results were more likely with larger samples.…”