Teaching children with autism to ask questions about hidden objects

We taught 2 4‐year‐old children with autism to ask questions of an adult who held a closed box with a toy inside. The treatment package (modeling, prompting, and reinforcement) was evaluated with a multiple baseline design across the three question forms during training, generalization, and follow‐up evaluations. The first question form (“What's that?”) produced the name of the hidden item. The second form (“Can I see it?”) produced sight of it, and the third form (“Can I have it?”) produced the item itself. Both children learned to ask questions about hidden objects.