Some current themes in functional analysis research.

Vollmer et al. (1996) wrote a narrative review. They mapped the big themes in functional analysis research. They did not run new experiments. They read the field and told us where it was heading.

The paper lists clinical and research themes. It says functional analysis is powerful. It also warns that time, staff, and money can block real-world use. No new numbers are given.

Weber et al. (2024) extends the warning. Their large clinic case-series shows most analyses find a function, but many need extra steps when first results are unclear. The 1996 call for practical fixes is still alive.

Matson et al. (2011) zooms out. Their systematic review finds the evidence base is narrow: mostly young males with ID/ASD and tiny samples. The 1996 review did not spot this skew.

Cullinan et al. (2001) gives a concrete example. Their single-case study tests aggression with standard FA conditions. It shows the method works for that form, backing the 1996 claim of power.

You still need to plan for barriers before you start. Build extra sessions into the schedule for re-tests. Check if your client fits the usual sample or needs a wider lens. The core tool is solid, but the logistics have not changed since 1996.