A portable system for studying discrete-trial group choice.

C et al. built a laptop-size rig for discrete-trial group-choice tests.

One computer, one projector, and four off-the-shelf gamepads let four people pick on the same screen.

The software logs every trial with time stamps—no Wi-Fi, no coding, no grad student hovering.

The paper only shows the rig works; it does not test a treatment.

Authors ran a short demo and the box tracked choices without glitches.

Kisamore et al. (2016) taught multiply controlled intraverbals with classic DTT tables. Their solid results can now travel—just plug the portable rig into any clinic corner.

Ferguson et al. (2020) proved quick post-session estimates catch mastery as well as trial-by-trial sheets. Pair their faster data rule with the new hardware and you cut setup and scoring time.

Palmer et al. (2018) warned that an experimenter in the room can halve off-task behavior. The 2015 kit removes the confound by letting the learner work while the adult steps back—same concern, opposite fix.

You can now run tight discrete-trial sessions in homes, parks, or cafeterias without lugging tables or clipboards. Swap in the gamepad rig, choose your program—tacts, intraverbals, listener tasks—and let the software count every response while you watch from across the room. It is a ready-made path to natural-setting research or practice that still gives lab-grade data.