“…Correspondingly, investigations with persons with developmental disabilities have concerned the relative effectiveness of reinforcers as a function of their unit price or related economic variables (DeLeon, Iwata, Goh, & Worsdell, 1997;Delmendo, Borrero, Beauchamp, & Francisco, 2009;Kodak, Lerman, & Call, 2007;Reed et al, 2009;Roane, Call, & Falcomata;2005). Among other contributions, behavioral economic analyses have provided a systematic means for investigating and quantifying relative value among qualitatively dissimilar reinforcers, sometimes by examining these relations when the reinforcers are concurrently available.…”