“…Often these individuals are aware of or have observed the student's challenging behaviour first hand and can provide critical information, such as the individuals present in the environment prior to the challenging behaviour (e.g., specific students in the cafeteria). When interviews are structured and objective, the FBA team can collect critical points of interest, such as events that immediately preceded the demonstration of the behaviour (Barnhill 2005;Gresham, Watson, and Skinner 2001;Ryan, Halsey, and Matthews 2003;Umbreit et al 2007;Wheeler and Richey 2010).…”