The goal of this study is to apprehend the perceptive training capacities of a human subject via an artificial device and to also underline their limits and constraints. The principal constraint considered here, is the acuity in other words, the spatial proprieties ratio of the sensor and the explored objects. The experimental device couples the pen of a graphics tablet with tactile sensory stimula-tors. A matrix of virtual receptor field linked to a stylus by means of an equipped computer is responsible for the stimulator activation. The results show: i) that the sub-jects are able to perceive forms via this artificial device and that this perception is forced by the spatial resolution of the sensor. ii) That the subjects are able to adapt their movements to perceive very small forms (0,5 mm height). iii) To develop new exploration strategies. Copyright © 2004 by the Association for Computing Machinery, Inc.