What is verbal behavior in ABA?
Verbal behavior is B. F. Skinner's functional account of language, which classifies communication not by the form of the words but by why they are said - the conditions that occasion them and the consequences that maintain them.
In everyday usage, knowing a word is treated as one skill: a child either 'has' the word cookie or doesn't. The verbal behavior account splits that into separate skills called verbal operants. Saying 'cookie' to get one (a mand), saying it upon seeing one (a tact), repeating it after someone says it (an echoic), and answering 'What do you eat?' with it (an intraverbal) are different behaviors, learned under different conditions, even though the spoken word is identical.
That distinction has direct clinical consequences. A learner may tact hundreds of items yet never mand for anything, or echo fluently without answering a single question. Treating language as one skill hides those gaps; assessing operant by operant exposes them and tells the clinician exactly which conditions to teach under.
Verbal behavior is also modality-neutral. Signs, picture exchange, and speech-generating devices all count - what matters is the function of the communication, not whether it is spoken. This is why early language programs can begin building mands before vocal speech is available.
Many widely used early-language assessments and curricula in ABA are organized around the verbal operants, tracking a learner's repertoire in each and sequencing targets so that a word learned in one operant is deliberately brought into the others - taught as a tact, then brought to the mand, the intraverbal, and beyond, since transfer between operants cannot be assumed.
For therapy teams, the practical takeaway is precision. A goal written as 'will use 50 words' says little; a goal written as 'will mand for preferred items across settings' or 'will answer wh- questions intraverbally' names the operant, the condition, and the consequence - which is what makes progress measurable.