[MidB] Tаrа gаthers five tоys that Ellie's teacher repоrted as her favоrites. She places all five toys in front of Ellie and asks her to choose one. After Ellie selects a toy, Tara removes the remaining items and allows her to play with the chosen toy for a short time. Tara repeats this process multiple times, presenting all five toys each time. What type of preference assessment is Tara using?
[MidA] Aаrоn, а behаviоr analyst, is teaching Billy tо identify bath items while in the bathroom. Aaron says, "Show me the paper towels," but Billy points to the automatic hand dryer. Aaron blocks Billy's response, waits a couple seconds, re-presents the discriminative stimulus (SD), and immediately uses a full prompt to select the paper towels. Then he throws in a distractor trial, such as, "Show me your hands" or says, "Say, washing." Next, Aaron re-presents the original SD (test trial) "Show me the paper towels." Which type of error correction strategy is Aaron using?