“…Several applied studies that have examined differences in preference assessment outcomes as a function of duration of stimulus availability or engagement may lend some support for the notion that continuity of access may play an important role in determining the reinforcing value of some stimuli. In general, results of this research have suggested that relative preference for stimuli may differ according to duration of access (e.g., Kodak, Fisher, Kelley, & Kisamore, ; Steinhilber & Johnson, ) or that preference based on engagement during short durations of access may not always predict preference based on responding during extended periods of access (Rapp, Rojas, Colby‐Dirksen, Swanson, & Marvin, ). For example, Steinhilber and Johnson () compared preference for and reinforcing efficacy of various activities (e.g., music, video games) using a multiple‐stimulus‐without‐replacement (MWSO) preference assessment (DeLeon & Iwata, ) when the selected stimuli were delivered for 15 s or 15 min.…”