Service Delivery

Evaluating a GPS-based transportation device to support independent bus travel by people with intellectual disability.

Davies et al. (2010) · Intellectual and developmental disabilities 2010
★ The Verdict

A phone that beeps at the right bus stop triples travel success for adults with ID.

✓ Read this if BCBAs helping adults with ID use public transit or community locations.
✗ Skip if Clinicians who only serve young children in home settings.

01Research in Context

01

What this study did

Adults with intellectual disability tested a handheld GPS device. It beeped and showed pictures when the bus neared their stop.

Researchers compared the GPS prompts to giving riders a paper map plus spoken directions.

02

What they found

The GPS group made three times more correct exits. They also took the right bus more often.

People liked the device and felt safer riding alone.

03

How this fits with other research

Chang et al. (2011) used the same location-aware beeps for job tasks. Their adults with ID also worked more independently when the phone vibrated at each work station.

Anonymous (2025) moved the idea to kids and VR games. The WISH→WON fading steps let children with mild ID play exergames without help after 16 class periods.

Cashon et al. (2013) kept the community setting but taught stranger safety. Like the GPS study, they mixed classroom lessons with real-world practice and saw lasting gains.

04

Why it matters

You can swap paper directions for a cheap phone app. Add beeps or pictures that pop up near key spots. Start with one bus route, then fade yourself out. The same logic works for job sites, VR games, or safety skills.

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Load a free GPS alarm app, set one stop-based cue, and test it on a single bus route this week.

02At a glance

Intervention
other
Design
quasi experimental
Population
intellectual disability
Finding
positive
Magnitude
large

03Original abstract

We examined the utility of a PDA-based software system with integrated GPS technology for providing location-aware visual and auditory prompts to enable people with intellectual disability to successfully navigate a downtown bus route. Participants using the system were significantly more successful at completing a bus route than were people in a control group, who used a map and verbal directions. Further, when using the GPS-based system, 73% of participants successfully rang the bell and exited the bus at the right stop compared with only 8% of the control group. This finding was observed for individuals attempting to follow a new bus route for the first time and get off the bus at a previously unknown location.

Intellectual and developmental disabilities, 2010 · doi:10.1352/1934-9556-48.6.454