Normally, researchers who use such computerized surveys ask participants to do their own keypunching.

Thanks to new cellphones and to software from phone manufacturers and others, saying goodbye to all that thumb-busting keypunching is relatively easy.

After some keypunching and screen flickering, the image shifted to some broken ridges, running north-south across the screen.

Therefore, it could be used in conjunction with theoretically simple mechanical scanners that would only need to recognize character, word, and sentence boundaries, removing the need for full optical character recognition or manual keypunching.