Definition:
Standards of Practice:
Additional Considerations:
Heather B Levingston, Nancy A Neef, Traci M Cihon
J Appl Behav Anal. 2009 Summer; 42(2): 361–367. doi: 10.1901/jaba.2009.42-361
Kristin H Mayfield, Timothy R Vollmer
J Appl Behav Anal. 2007 Summer; 40(2): 223–237. doi: 10.1901/jaba.2007.108-05