“…Resurgence refers to an increase in a previously reinforced target behavior following a relative worsening of conditions for a more recently reinforced alternative behavior (e.g., Epstein, 1985; Lattal & Wacker, 2015; Shahan & Craig, 2017). Resurgence is theoretically important because it provides a testing ground for examining core questions about the allocation and regulation of operant behavior across time and changing circumstances (see Shahan, 2017, 2020, for discussions). Further, resurgence is of applied significance because it may contribute to instances of treatment relapse following otherwise successful differential‐reinforcement‐based interventions for a range of problematic behaviors including, but not limited to, destructive behavior in intellectual and developmental disorders (e.g., Volkert et al, 2009; Wacker et al, 2011), substance abuse (e.g., Podlesnik et al, 2006; Quick et al, 2011; Silverman et al, 1999) and anxiety disorders (see Smith et al, 2020).…”