[MidA] Sebastian, a behavior analyst, has observed that his…
Sebastian, a behavior analyst, has observed that his student, Allison, enjoys singing along to certain songs more than others. To assess the reinforcing effectiveness of her favorite songs, Sebastian begins by asking Allison to complete simple matching worksheets where she circles the pictures that go together. Sebastian does not deliver programmed consequences for correct responses. After a few sessions, Sebastian presents similar matching tasks but plays several seconds of a favorite song following each correct response. After completing an A-B-A-B design, Sebastian finds that Allison’s rate of responding during the music-delivery phase is comparable to the no-consequence phase. Which of the following assessments did Sebastian use?