“…The ambiguity of the instructor's response momentarily increased the value of a specific teacher's name as a reinforcer and established the conditions necessary to teach the mand ''who.'' Using a similar interrupted chain procedure, additional researchers have used Michael's (1993) concept of the CEO-T to teach mands for information with preschool children and children with autism (Endicott & Higbee, 2007;Shillingsburg & Valentino, 2011), assess the transfer of mands across EOs (Lechago, Carr, Grow, Love, & Almason, 2010) and settings (Betz, Higbee, & Pollard, 2010), establish derived manding skills for adults with developmental disabilities (Rosales & Rehfeldt, 2007), and test for transfer across verbal operant categories following manual sign and PECS training (Ziomek & Rehfeldt, 2008).…”