The response topography is not an important consideration in the classification of the tact. The response may be vocal, writing, gestural, or any form of behavior, as long as the reinforcement is mediated and the form of the response is controlled by a prior non-verbal stimulus.
A form of verbal behavior with the following features:
A verbal response
The controlling variable is a non-verbal stimulus, which is an object or event or a property of an object or event
The musculature with which the response is executed (vocal, written, gestural, etc.)
The modality of the stimulus (auditory, visual, gustatory, olfactory, etc.)
Whether or not there is any reinforcement for the current response
The “correctness” of the response