Two adults with multiple disabilities use a computer-aided telephone system to make phone calls independently.

Two adults with visual and motor impairments got a net-book phone setup. A small microswitch sat where each user could hit it without strain.

The net-book ran phone software and held a GSM modem. One switch press scrolled the contact list; a second press dialed the chosen name.

Both adults learned the two-step routine in the first session. They then called family, friends, and staff on their own across the study.

Calls stayed high until the device was removed. When it returned, calling jumped back up, showing the switch itself controlled the behavior.

Robertson et al. (2013) ran the same microswitch net-book setup two years later. The later paper widened the call list but kept the core design, a clean conceptual replication.

Lancioni et al. (2011) swapped phone calls for text messages in a similar ABAB design. Same hardware, same positive gains, only the output changed.

Robertson et al. (2013) also tried the tech with post-coma adults who could barely move. The switch now triggered texts, extending the idea to traumatic brain injury.

If a client can hit a switch, you can give them a social life. One microswitch plus an old net-book creates an instant phone or text line. Try it during downtime next session: pair a single switch with a calling app and let the learner dial a favorite person. No voice, no vision, no fine motor skills required—just one reliable movement and a ring on the other end.