“…A 4th student received instruction on one task only. In using time delay procedures to teach task-analyzed chained responses, we replicated previous research (McDonnell, 1987;McDonnell & Ferguson, 1989;Miller & Test, 1989;Schoen & Sivil, 1989;Schuster, Gast, Wolery, & Guiltinan, 1988;Wolery, Ault, Gast, Doyle, & Griffen, 1990, 1991. However, the use of time delay to teach activities in which the risk of injury was present has not been documented.…”