“…Figure 2 shows the percentage for each topography of collateral behavior evaluated in the studies reviewed. Topographies included appropriate vocalizations (62.96%, 17/27 studies which assessed collateral behavior), play (11.11%, 3/27: Boyd et al., 2011; Cividini‐Motta et al., 2019; Saini et al., 2015), on‐task behavior (7.40%, 2/27: Barszcz et al., 2021; Gibbs et al., 2018), holding objects (3.70%, 1/27: Boyd et al., 2011), heart rate (3.70%, 1/27: Frewing et al., 2015), vocal stereotypy (3.70%, 1/27: Pastrana et al., 2013), trashcan disposal of inedible items as an alternative to pica (11.11%, 3/27: Hagopian et al., 2011; Schmidt et al., 2017; Taylor, 2020), vacuuming inedible items as an alternative to pica (3.70%, 1/27: Schmidt et al., 2017), functional engagement in cooperative leisure activities (3.70%, 1/27: Steinhauser et al., 2021), flexible behavior (3.70%, 1/27; a loose definition of appropriate behaviors to increase alongside inflexible behaviors in Kunze et al., 2021), and correct responses to teacher provided discriminative stimuli (3.70%, 1/27: Tullis et al., 2020). Most studies (85.18%, 23/27) measured collateral responses that were matched to the form of stereotypy or undesirable target behavior (e.g., appropriate vocalizations for vocal stereotypy, or discarding items for pica (Martinez & Betz, 2013); while the rest assessed unmatched collateral behavior (e.g., appropriate vocalizations for motor stereotypy).…”