Efficiency in functional analysis of problem behavior: A quantitative and qualitative review
Trial-based and synthesized contingency FAs give you the fastest route to identifying function without losing experimental control.
01Research in Context
What this study did
Saini et al. (2020) read every efficiency study on functional analysis they could find. They pulled out numbers on how long each format took and how many sessions it needed.
They compared trial-based, brief, multielement, and synthesized contingency designs side-by-side.
What they found
The winners for clock time were trial-based and synthesized contingency FAs. They needed the fewest minutes to show you the function.
Multielement and synthesized contingency tied for session count. Both wrapped up in about the same number of visits.
How this fits with other research
Webb et al. (1999) already showed brief FAs could match long ones in under one-fifth of the time. The new review keeps brief on the map but bumps trial-based and synthesized designs to the top speed slot.
Kahng et al. (1999) warned that brief FAs only matched full results two-thirds of the time. Saini’s team still lists brief as an option, but they quietly rank it behind trial-based and synthesized contingency for pure speed.
Jessel et al. (2020) gave real-world proof that 3-minute sessions work. That backs up the review’s praise for super-short formats.
Why it matters
If your clinic calendar is packed, pick trial-based or synthesized contingency FAs. You will shave minutes off each session and still get a clear answer. Keep 3-minute sessions in your pocket as a ready-made way to hit that speed target.
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02At a glance
03Original abstract
Originating in the mid-1960s, functional analysis (FA) has become the gold standard method for understanding the environmental variables that come to shape and maintain problematic behaviors such as aggression, self-injury, and property destruction. Over the decades, a number of studies have refined FA methods, attempting to improve the overall efficiency of the analysis through experimental design and procedural modifications. In the present review, we used ongoing visual-inspection criteria and basic probability theory to compare and analyze levels of efficiency across FA types. The multielement design and synthesized contingency analyses were about equally efficient with respect to the mean number of sessions conducted per function tested, and the trial-based and synthesized contingency analyses were the 2 most efficient with respect to the mean duration per function tested. We discuss the implications of these findings in the broader context of efficiency and provide recommendations for maximizing efficiency during an FA. We also discuss other qualitative procedural details that may influence the overall efficiency of an FA.
Journal of Applied Behavior Analysis, 2020 · doi:10.1002/jaba.583