The Extended Drawing Test is a computerized graphonomic assessment for arm and hand function. It is designed to be very easy and cheap to use (testing time = 2 minutes). The EDT measures the ability of the subject to draw vertical lines, with both the left and right hands. To measure subject performance in both gross arm movements and fine finger control (holding a pen), the subject draw lines holding both a graphics tablet pen on its own and then holding a mouse-style pen holder.
To date we have acquired age-independent healthy norms for the EDT. Deviations from the healthy norms will reflect different pathologies for different patient groups. At the moment we are focusing on hemiplegic stroke patients.
Vuillermot, S, Pescatore, A, Holper, L, Kiper, D and Eng, K.