“…That is, researchers have programmed digital tutors to present instructional stimuli and provide differential feedback contingent on learner responding. For example, in a series of recent studies, researchers used digital tutors to teach reading skills to students with ESN (Saadatzi, Pennington, Welch, & Graham, 2018a, 2018b; Saadatzi, Pennington, Welch, Graham, & Scott, 2017). During instruction, a digital tutor used speech to text technology and constant time delay procedures to respond to students’ vocal responses to words presented on digital flash cards.…”