The invention relates to medicine, to the section of neurology and neuropsychology, and can be used in offices neurorehabilitation neurological and neurosurgical clinics in conducting neuropsychological diagnosis of one of the components of the process space of human perception - the perception of length, is impaired in patients with neurological clinic with organic brain lesions.The apparatus comprises a plastic formed from a rectangular base (1) with a thickness of 2-4 mm, which are located along the perimeter of the beads (2) a height of 1-3 mm and a width of 5-10 mm, which is formed on the base (1) of the device cavity (3) and dimensions which correspond to the size A4 standard sheet size and the depth equal to the height of ribs (2), wherein the front surface of the cavity (3) has a light color and contains 6-10 deposited on it parallel segments (4) 1-2 mm thick, with to the top of the base (1) through the swivel device (5) under the izhno fixed plate made of a plastic stencil (6), whose dimensions are equal to the dimensions of the cavity (3), and thickness equal to the height of ribs (2), and in the stencil-plate (6) is provided with through slots (7) 3-4 mm . the number and location of which strictly correspond to the number and location of the segments (4) deposited on the front portion of the cavity (3), while on the front side of the stencil-plate (6) over each slot (7) are applied line-risk (8) thickness 1- 1.5 mm, the dividing groove (7) into four equal parts, and under each slot (7) are applied line-risk (8) dividing groove (7) into three equal parts, wherein on either side of each line risks (8) applied symmetrically control strips (9) with millimetric graduations and reference numeral centimeters, and in n izhney stencil-plate part (6) is fastened pen-protrusion (10).The proposed device extends the length perception studies in patients with neurological neuropsychological diagnostic clinic, without letting the printed materials easily generate task o
