A comparison of teaching tacts with and without background stimuli on acquisition and generality

Mitteer et al. (2020) asked a simple question: Does adding background pictures speed up tact learning for kids with autism? They compared two ways to run discrete-trial tact sessions. One way showed the target item on a plain white card. The other way showed the same item sitting in a scene, like a cup on a kitchen table. The team used an alternating-treatments design so each child got both styles during the same day.

Kids learned the new tacts just as fast with or without the background scenes. The line graphs for the two conditions almost overlap. But there was a catch. When the researchers tested the kids in new rooms or with new pictures, correct answers jumped around. Some children needed extra teaching rounds before they could label the same item anywhere. Backgrounds did not hurt, yet they did not help either.

Bowen et al. (2012) saw the same null result in mand training. Adding the question "What do you want?" did not change how quickly children learned to ask. The pattern repeats: small verbal tweaks rarely speed acquisition.

Shillingsburg et al. (2009) and Lerman et al. (1995) warned that generality never comes free. Their studies showed kids can master yes/no or mands in one setting, then fail in the next without extra teaching. Mitteer’s data line up perfectly—background scenes alone do not produce generalization.

Baron et al. (1968) looked at matching-to-sample and found the opposite: requiring kids to look at the sample sped up learning. That contrast is useful. It tells us stimulus control matters, but the kind of background used in tact training is not the critical piece.

You can stop worrying about pretty backgrounds when you write tact programs. Pick the style that is easiest to print or that the child likes; learning rate will stay the same. Plan ahead for generalization instead. After the child labels the picture at the table, test the same label with real objects, in new rooms, and with new people. Add those extra probes early so you do not have to backtrack later.