Old pictures of communication aids.

Whiteboard with pen and rag.

Blocnote with pen and preprinted messages.

To warn, a little bell is used.

Bell, laserlight and alphabet card.

A low-tech way to test gaze-control.
The partner sits on the other side to note groups
of characters and writes down key-words. There
are many commercial alternatives available now.

Switches connected to infrared keyboard.

Tired programmer with test subject.

Laboratory: Laptop, switches and darci-usb. Clearly, there are too many loose ends to work with patients.

Switches and keyboard (1995).