“…In support of this view, speakers gesture more in description tasks that are more cognitively demanding (e.g., Hostetter, Alibali, & Kita, 2007), and they gesture more when they are under extraneous cognitive load (e.g., Hoetjes & Masson-Carro, 2017). Moreover, there is evidence that speakers gesture more when ideas are difficult to describe, either because the ideas are not easily lexicalized in their language (e.g., Morsella & Krauss, 2004; but see de Ruiter et al, 2012), because the speakers are bilingual (e.g., Nicoladis, Pika, & Marentette, 2009), or because they have a brain injury (e.g., Göksun, Lehet, Malykhina, & Chatterjee, 2015;Kim, Stierwalt, LaPointe, & Bourgeois, 2015). Although task difficulty does not guarantee an increase in gesture rates-as there must first be an underlying imagistic simulation that is being described-the GSA framework contends that increased cognitive load can result in lower thresholds and higher gesture rates.…”