The Verbal Behavior Stimulus Control Ratio Equation: a Quantification of Language

Mason and colleagues built a new ruler for language. They call it the SCoRE.

The ruler turns Skinner’s six verbal operants into simple ratios. You plug in counts from a language sample. The math spits out one profile that shows how balanced the speaker is.

The paper is conceptual. No kids were tested. The team shows the formula and walks through mock data.

The SCoRE gives a single pie chart of mand, tact, echoic, intraverbal, textual, and autoclitic proportions.

A score near 1 means the operants are even. A score near 0 means one operant dominates. The authors claim this lets you track change in therapy without guessing.

Bao et al. (2017) counted real studies and found mand and intraverbal training rule the autism literature. Mason’s tool now gives those same two operants a seat at the ratio table, so future reviews can use hard numbers instead of tallies.

Baer et al. (1984) warned that almost nobody tests Skinner’s categories. Mason answers that call by giving researchers a quick metric that invites before-and-after data.

Matson et al. (1989) showed raters can’t agree on meaning. Mason sidesteps meaning entirely; he only counts operant form, so inter-rater reliability should be higher.

You now have an Excel-ready formula to turn any language sample into a clear graph. Run the sheet at intake, after six months, and at discharge. If the mand slice grows, your request program worked. If the intraverbal slice stays flat, you know where to pivot. No jargon, no guesswork, just numbers you can show parents and funders.