“…Thus, future researchers could conduct comparisons of methods for categorizing the putative disparity of stimulus sets to identify feasible and efficient methods that can be used in practice. Furthermore, researchers could evaluate other components of both auditory and visual stimuli that might influence stimulus disparity, such as tones, number of syllables, starting and ending sounds, repetitive syllables or sounds, color, shape, critical features, and visual complexity (e.g., Cariveau et al, 2020; Layng, 2019; Wolery et al, 2014). Comparisons of the effects of other components of auditory and visual stimuli on acquisition could lead to improved practice guidelines for the assignment of stimuli to sets.…”