[MidA] Von, a behavior analyst, is working on increasing Jer…
Von, a behavior analyst, is working on increasing Jerrod’s vocal repertoire. Von takes Jerrod to a highly preferred therapy room containing several of Jerrod’s preferred items, including several toy trucks. Von follows Jerrod around the room. When Jerrod sits down next to the toy trucks and begins sorting them, Von sets some trucks aside. When Jerrod reaches for the toy truck that Von had set aside, Von models the sound by saying, “Tuh,” and Jerrod repeats the sound saying, “Tuh.” Von gives the toy truck to Jerrod and continues to contrive echoics in the therapy room depending on what Jerrod is most interested in playing with. Which of the following teaching strategies is Von using with Jerrod?