Examination of an antecedent communication intervention to reduce tangibly maintained challenging behavior: a controlled analog analysis.

Three students with developmental delay took part. Each child hit, screamed, or grabbed when toys were nearby but not in reach.

The team used an ABAB design. In baseline, the toy sat on the table and problem behavior was measured. In treatment, the adult first taught the child to say or sign “toy please,” then placed the item in view. No extra prompts were given later.

Problem behavior dropped to near zero for every child once they had to mand before the toy appeared. The effect returned when the rule was removed, then came back again when the rule returned.

Lambert et al. (2017) built on this idea. They chained several mands in a row instead of one. Their serial FCT kept problem behavior low even when reinforcement later stopped.

Stevens et al. (2018) added lag schedules. Kids had to vary their requests up to five different ways. Problem behavior stayed low and mands stayed fresh, showing the antecedent trick keeps working when you stretch it.

McGonigle et al. (2014) moved the same logic to adults with Rett syndrome. They used a voice-output switch instead of speech or sign, yet the first request still cut problem behavior.

You can stop tangible battles before they start. Put the item out of reach, prompt one quick mand, then hand it over. No need to wait for problem behavior. Try it next session: place the iPad on a high shelf, wait for “iPad please,” and deliver immediately. One simple rule can save ten minutes of escalation.