“…Null effects can, obviously, establish that a practice is ineffective. For example, studies with null effects have been the basis for concluding that practices such as facilitated communication (see Travers, Tincani, Thompson, & Simpson, 2016), weighted vests (see Barton, Reichow, Schnitz, Smith, & Sherlock, 2015), and exclusionary discipline practices (e.g., office discipline referrals, suspensions; see Nese & McIntosh, 2016) do not generally result in improved learner outcomes. Studies with null effects, then, play a critical role in objectively establishing that policies and practices are ineffective and should not be implemented.…”