“…A total of 36% (n = 13) of studies reported using an echoic prompt, manual prompt, or gestures to teach the target response. Four studies reported using a picture to prompt the correct response (Contreras & Betz, 2016;Feng et al, 2015;Goldsmith, LeBlanc, & Sautter, 2007;May, Hawkins, & Dymond, 2013), one study reported using manual guidance to prompt the selection of a correct intraverbal on a speech-generating device (Lorah, Karnes, & Speight, 2015), one study reported using both an echoic and textual prompt (Carnett & Ingvarsson, 2016), and three studies did not report using a prompt (Lerman et al, 2005;Mason, Davis, & Andrews, 2015;Valentino & Shillingsburg, 2011).…”