[U2Q] Charles is working through a math game on an interacti…

 Charles is working through a math game on an interactive computer program. Each time he completes a portion of the game correctly, he receives a star symbol at the bottom of the page to reveal his advancement through the game. When Charles earns a total of 10 stars, he has completed the interactive math game. This is an example of which type of feedback?

[U1Q] At the beginning of the week, a preschool student’s in…

 At the beginning of the week, a preschool student’s intervention team completed a preference assessment which illustrated a love of pretzel M & M’s. On Thursday, after 20 hours of instruction on a FR 2 schedule of reinforcement (getting reinforcement after every second response), the student started throwing the instructional materials and no longer ate the reinforcers that he received. This is likely due to: