The plates are designed to be appreciated correctly in a room which is lit adequately by daylight and held 75 cm. from the subject (person) and tilted so that the plane of the paper is at right angle to the line of vision. The numerals which are seen on plates no. 1 to 17 are stated(observed),and each answer should be given without more than three (3) seconds delay then writing into this table below. If the subject (person) is unable to read numerals, plates no. 18 to 24 are used and the widing lines between the two X's are traced with the brush or fingertip. Each tracing should be completed within ten (10) seconds then sketch into this table below.