“…Experimental analyses are reported but are by no means the norm. School-based research using functional assessment seems to follow the approach advocated by some researchers (e.g., Anderson & Scott, 2009;Matson, 2012;O'Neill, Horner, Albin, Storey, & Sprague, 1997;Scott, Bucalos, Liaupsin, Nelson, Jolivette, & DeShea, 2004) and referred to by Hanley as the "least restrictive hierarchical approach." Indirect assessment is conducted first followed by descriptive observations (ABC observations, structural analysis) and, in some case, a functional analysis.…”