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5.1.3. The diagnostics of differential threshold of sensations

In motive analyzer

The diagnostics of differential threshold of sensations is made with the help of a cinematometric technique of E.P.Ilyin (1981) by way of registration of minimal possible deviation when repeating the movement.

5.1.3.1. The procedure of diagnostics and working up of the results

5.1.3.1.1. A differential threshold can be defined without making a separate procedure of diagnostics. Using the results from the report of the diagnostics of NS mobility-inertness (see table 7 from § 2 of chapter III) will be enough.

The order of defining of the differential threshold is illustrated on the example of using the figures of table 7.

5.1.3.1.2. Write out the chosen small intervals from column 2 of table 7 into column 1 of table 10 and put down the chosen big intervals into column 3.

5.1.3.1.4. Then write out the deviations received on small (into column 2) and big (into column 4) intervals from columns 4 and 6 of table 7 into table 10.

Thus the signs “+” and “-” should not be written out and taken into account.

Note. You should write out only those cases when the legal and actual signs coincide.

5.1.3.1.5. Calculate arithmetic mean numbers for each column of table 10 taken separately and mark them with letters by analogy with the item 5.1.2.2.

Table 10 – the example of the report of the diagnostics of movement differentiating accuracy (the figures are taken from table 7)

Chosen small

Intervals from

Column 2

Of table 7

Deviations on Small intervals

From columns 4 and 6 Of table 7

Chosen big Intervals from Column 2 Of table 7

Deviations on

Small intervals

From columns 4 and 6 Of table 7

1

2

3

4

43

42

44

40

2

1

3

3

3

4

3

4

183

185

182

187

5

4

4

5

4

5

5

6

M1 = 42,3

A1 = 2,9

M2 = 184,3

A2 = 4,7

RMD small = 4,5 %

RMD big = 2,0 %

5.1.3.1.6. Calculate a relative mistake of differentiating the movements (RMD) in percent for small intervals according to the following formula:

A1 – 1

RMD small = ---------- x 100 % (9),

M1

Where: RMD small – relative mistake of differentiating the movements on small

intervals,

A1 – arithmetic mean of deviations on small intervals,

M1 – arithmetic mean of chosen small intervals.

Calculate the relative mistake of differentiating the movements on big intervals (RMD big) by analogy.

5.1.3.1.7. Calculate the value of differential threshold (DT) of sensations by formula:

RDM small + RDM big

DT = ------------------------------ (10),

2

Having substituted the figures from table 10 we get:

4,5 % + 2,0 %

DT = ------------------- = 3,3 % (11).

2

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