5.2.2. The procedure of diagnostics

5.2.2.1. Prepare the form of investigation report beforehand (table 14) and put down into column 2 thirteen values of intervals (tasks), which you will set to your examinee. These intervals are within the range from 50 up to 80 scale divisions of a bar and have a random order.

Table 14 – the report of the diagnostics of estimation by eye

№ of procedure	The interval established by the examinator, divisions	The interval established by the examinee, divisions	Reproduction mistake
1	2	3	4
1 2 3 4,etc.	70 60 80 50, etc.

5.2.2.2. Place the device ATS-6 directly in front of your examinee sitting at table.

5.2.2.3. Adjust the risk of the left romper-suit on one of the digits within the range from 50 up to 80 scale divisions of the bar.

5.2.2.4. Move the bar with a scale, so that the bar without a scale (a “blind” bar with a line in the middle) could be seen.

5.2.2.5. The examinee should adjust the right romper-suit risk symmetrically, so that the distance between the risk and the line in the center was equal to the distance between the left romper-suit risk and the line.

5.2.2.6. The examinee carries out his task in a tempo, which is convenient for him, and he is not short of time. He may correct the position of adjustable romper-suit.

5.2.2.7. Place the bar with a scale back. Make the counting of the interval established by the examinee. Put down the result into column 3 of table 14.

5.2.2.8. Repeat the procedure through items 5.2.2.3 – 5.2.2.7 twelve times setting different intervals within the range between 50 and 80 divisions (according to the tasks put down into column 2 of the report beforehand).

5.2.3. Working up of the results

5.2.3.1. The first three procedures are considered trial. Their results (put down into the first three lines of the report) are not taken into account.

Compare the indexes of lines 2 and 3 of the remaining ten lines of table 14 with each other. Put down the absolute difference between these indexes (mistake) into column 4 of table 14.

5.2.3.2. Thus from the calculated mistake calculate “jumping out” mistakes, i.e. the mistakes deviating from arithmetic mean on a quantity more than three σ. To define “jumping out” mistakes you should multiply the arithmetic mean to 1,7. The mistakes, which turned out to be peer or exceeded the received result, are “jumping out” and they are eliminated from the report.

5.2.3.3. From the remaining mistakes (after eliminating the “jumping out” mistakes) calculate an arithmetic mean mistake, which is a required result.

5.2.4. The interpretation of results

5.2.4.1. The accuracy of estimation by eye is inversely proportional to the value of arithmetic mean mistake of interval reproduction.

5.2.4.2. The estimation by eye is estimated in accordance with the diagnostic scale presented in item 2.4 of appendix 2.