Here we report an extract of the materials, methods and results used in a study with blind and visually impaired children. To read more, download the paper.
A: Child performing the tactile symbol recognition test. B: Tactile symbol recognition and enumeration in noise test. C: Memory spanning of sequences of tactile symbols test.
A: Experimental setup with a tactile display on the left side and the PC running PadDraw software on the right side. Picture shows an example of trial of the spatial memory test. B: Spatial memory test with 4×4 matrix and 4 targets. C: Shapes recognition test with a rectangle (top-left) as target and three distractors.
Possible geometrical shapes of the shapes recognition test. The first row from the top shows the three possible canonical shapes. The rows from the second to the fourth show the possible distractors. Each row from the second to the fourth shows one of the three possible levels of difficulty of distractors in decreasing order (3,2,1).
Normalized accuracy enhancement (SEM indicated) across sessions in the shapes recognition test (A) and in the spatialmemory test (B) using programmable tactile displays. Asterisks indicate a significantly larger accuracy enhancement relative to the baseline (* P<0.05)
Leo, F., Cocchi, E., & Brayda, L. (2017). The Effect of Programmable Tactile Displays on Spatial Learning Skills in Children and Adolescents of Different Visual Disability. IEEE Transactions on Neural Systems and Rehabilitation Engineering, 25(7), 861-872.
Nadine Besse, Samuel Rosset, Juan José Zárate, Elisabetta Ferrari, Luca Brayda and Herbert Shea, “Scalable latching assistive haptic display using a shape memory polymer membrane”, submitted to IEEE Transactions on Haptics 2017
The first prototype of the BlindPAD as a full portable device is ready and tested at FIRR in Poland and Chiossone in Italy. In the video Prof. Herbert Shea from EPFL explains the BlindPAD.
At the Makerstown the first qualitive results of the experiments in Poland with the 12×16 BlindPAD was presented. Also, the proto1 was demonstrated onsite.
At the World Haptics J.J Zarate, N. Besse, O. Gudozhnik, A. Ruch, H. Shea, demonstrated the “Portable pin array with 192 fast latching taxels”. Also an oral presentation was given about the portable pins. Many people tried out the demonstrator. A lighter version of the proto1, which was used at the first prototypes was presented at the World Haptics.