Use of Latency to Problem Behavior in the Assessment and Treatment of Severe Self-Injurious Behavior

A common index of response strength used in the assessment and treatment of problem behavior is rate of responding (e.g., Iwata, Dorsey, Slifer, Bauman, & Richman, 1994). However, repeated occurrences of a problem behavior during a session may be either impractical or unsafe such as in the case of vomiting, elopement, or severe forms of self-injurious behavior. One area that has received increasing attention in applied literature is the use of response latency during assessments (e.g., Call, Pabico, & Lomas, 2009; Zarcone, Crosland, Fisher, Worsdell, & Herman, 1999). In a recent study, Thomason-Sassi, Iwata, Neidhart, & Roscoe (2011) demonstrated the utility of response latency during functional analysis of severe problem behavior. The purpose of the current study was to extend research on the use of latency measures as an index of response strength by using this index in both the functional analysis and treatment assessments of severe self-injury.