Naming, the formation of stimulus classes, and applied behavior analysis.

Vollmer et al. (1996) wrote a theory paper. They asked: can teaching a child to name things build whole new classes of related words? The team focused on kids with autism. They mapped out how one trained name could link many untaught skills, like reading or following new instructions.

The paper does not give new data. Instead it argues that naming is the engine that creates stimulus equivalence classes. Once a class forms, the child can read, hear, or say any item in that class without direct teaching.

Oliver et al. (2002) later tested the idea. Toddlers learned one tact name for several plastic shapes. Most kids then sorted, pointed to, and said other shapes in the same class, exactly as R et al. predicted. Hayashi et al. (2013) showed the same path with letters. Preschoolers first learned to pick a letter when they heard its name. Soon they could name the letter without extra training. The pattern held for harder tasks. Noell et al. (2026) built hierarchical classes such as 'animal–dog–poodle'. After brief training, children named new dogs and new animals correctly. Together these studies turn the 1996 theory into a practical teaching sequence.

You can use one naming lesson to unlock many untaught skills. Train the child to both hear and say the name. Then probe for emergent listener and speaker responses. If they appear, you just saved hours of direct teaching. If not, you know the class is still weak and needs more exemplars.