Using HEARING or VISION -- Which is better to
Determine when it is "clear to cross"?
Teaching students to choose vision or hearing to detect vehicles
We've already talked about teaching students to use their hearing and teaching them to use their vision to detect vehicles.
For students who have both vision and hearing it can be helpful for them to learn to use their hearing for crossing streets separately from learning to use their vision, and vice versa (for an example, you can read Vignette 4 -- Using vision and hearing).
After students know how to use their vision and how to use their hearing effectively, you can give them experience at a variety of crossing situations.
At each situation, you can ask them to determine whether it is a Situation of Uncertainty and if not, whether they can reliably detect all the approaching vehicles in that situation better with vision or with hearing.
Once they make their judgment, assess the situation with the TMAD twice (once while using their vision and once while using their hearing) and give them feedback as to whether they judged correctly.
You could assess both hearing and vision at the same time with the TMAD by documenting when they first hear AND when they first see each vehicle coming, if it is quiet when they first hear it.
But students may be able to see a vehicle sooner if they hear it first, and may be able to hear a vehicle sooner if they see it first, so if the purpose is to assess hearing only, the student's vision should be occluded and to assess vision only, the hearing should be occluded with noise blockers and/or earplugs.
Make sure the students have experience in
The Checklist Using Vision & Hearing may be helpful to document the experiences of the student.
- situations in which they can see the traffic better than they can hear it,
- situations in which they can hear the traffic better than they can see it, and
- Situations of Uncertainty in which neither their vision nor their hearing is good enough.