A device for evaluating or improving perceptual-cognitive abilities of a subject (201, 802, 902, 1102, 1203, 1302), comprising: a display (102, 103, 104, 105, 801, 1202) of virtual objects (303, 803, 903, 1204, 1205, 1303) moving in a given three-dimensional environment (101, 901, 1101, 1201, 1301) during successive tests, with the subject (201, 802, 902, 1102, 1203, 1302) in visual contact with the virtual objects (303, 803, 903, 1204, 1205, 1303) moving in the three-dimensional environment (101, 901, 1101, 1201, 1301); and a controller of the display (102, 103, 104, 105, 801, 1202) of the virtual objects (303, 803, 903, 1204, 1205, 1303) moving in the given three-dimensional environment (101, 901, 1101, 1201, 1301) during the successive tests, characterized in that the controller of the display (102, 103, 104, 105, 801, 1202) is configured for changing a speed of movement of the virtual objects (303, 803, 903, 1204, 1205, 1303) in the three-dimensional environment (101, 901, 1101, 1201, 1301), wherein the display immerses the subject in the three-dimensional environment, the display comprises a set of surfaces (102, 103, 104, 105) on which images are displayed to form the three-dimensional environment, the images displayed on the surfaces are stereoscopic images, the display comprises a shutter visual implement enabling the subject to perceive, in three dimensions, the virtual objects, positions of the virtual objects, and the three-dimensional environment, the display further comprises a positional sensor mounted to the shutter visual implement to track a position of the subject's head, and the controller controls the display to correct in real-time a visual perspective relative to the subject's head position. a display (102, 103, 104, 105, 801, 1202) of virtual objects (303, 803, 903, 1204, 1205, 1303) moving in a given three-dimensional environment (101, 901, 1101, 1201, 1301) during successive tests, with the subject (201, 802, 902, 1102, 1203, 1302) in visual contact with the virtual objects (303, 803, 903, 1204, 1205, 1303) moving in the three-dimensional environment (101, 901, 1101, 1201, 1301); and a controller of the display (102, 103, 104, 105, 801, 1202) of the virtual objects (303, 803, 903, 1204, 1205, 1303) moving in the given three-dimensional environment (101, 901, 1101, 1201, 1301) during the successive tests, characterized in that the controller of the display (102, 103, 104, 105, 801, 1202) is configured for changing a speed of movement of the virtual objects (303, 803, 903, 1204, 1205, 1303) in the three-dimensional environment (101, 901, 1101, 1201, 1301), wherein the display immerses the subject in the three-dimensional environment, the display comprises a set of surfaces (102, 103, 104, 105) on which images are displayed to form the three-dimensional environment, the images displayed on the surfaces are stereoscopic images, the display comprises a shutter visual implement enabling the subject to perceive, in three dimensions, the virtual objects, positions of the virtual objects, and the three-dimensional environment, the display further comprises a positional sensor mounted to the shutter visual implement to track a position of the subject's head, and the controller controls the display to correct in real-time a visual perspective relative to the subject's head position.