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5.5.3. Working up of the results

5.5.3.1. Among the thirteen investigation procedures the first three are considered trial and they are not taken into account in the process of working up the results. You should take into consideration only the following ten procedures.

5.5.3.2. Calculate the absolute mistakes made by left hand, i.e. the mistakes of movement reproduction by left hand without taking into account the sign of mistakes that depends on the pre- or post-position of the given interval. To make this you should compare the figures of columns 2 and 3 of table 17 with each other line by line. Put down the absolute difference between these figures into column 5.

5.5.3.3. By analogy calculate the absolute mistakes made by right hand, having compared the figures of columns 2 and 4 with each other. The difference should be put down into column 6.

5.5.3.4. Calculate the arithmetic mean mistake made by left hand and put it down into the lower line of column 3. Then calculate the arithmetic mean mistake made by right hand and put it down into the lower line of column 4.

5.5.3.5. Define the presence of the “jumping out” mistakes according to item 2.3.3 of the present chapter and if there are any, you should eliminate them from the report. After that calculate the arithmetic mean mistake of each hand again without any “jumping out” mistakes.

5.5.3.6. Then calculate the coefficient of the leading hand domination according to the formula:

Mleft – Mright

CHD = --------------------- x 100 % (19),

Mleft + Mright

Where: CHD – the coefficient of the leading hand domination,

Mleft – the arithmetic mean mistake of left hand,

Mright – the arithmetic mean mistake of right hand.

5.5.4. The interpretation of results

5.5.4.1. To put the diagnosis concerning the leading hand you should compare the arithmetic mean mistakes of left and right hands with each other.

  • If the examinee’s carrying out of the task is more accurate when he does it using his right hand – it tells that he a right-handed person.

  • A left-handed person executes the task more accurately using his left hand.

  • An ambidextrous person carries out the task with equal accuracy using both his right and left hand.

5.5.4.2. The coefficient of the leading hand domination of right-handed people has the sign “+” and that of left-handed people has the sign “-”.

5.5.4.3. In order to define the degree of significance of the leading hand domination coefficient you should use a universal diagnostic scale of asymmetries and deltas (see item 2.1 of appendix 2).

5.5.5. Some possible ways of practical use of the method and results of the diagnostics

5.5.5.1. The results of the diagnostics of right-left-handedness should be taken into account when defining the individual peculiarities of thinking according to the results of FAH investigation.

The left-side FAH displacement of right-handed people testifies to the predominance of abstract-logical and verbal thinking and the right-side FAH displacement – to the predominance of emotional-figurative and spatial thinking.

The left-side FAH displacement of left-handed people testifies, on the contrary, to the predominance of emotional-figurative and spatial thinking and the right-side FAH displacement – to the predominance of abstract-logical and verbal thinking.

5.5.5.2. It is reasonable to use the method and the results of the leading hand diagnostics in the process of individual activity style formation. So, in sports, military and physical training you should take into account that the optimal pose (rack) depends on the leading hand or leg. If, for example, a re-taught left-handed boxer, fighter or fencer changes his right pose into the left one, he can get a double advantage: 1) he can raise the dexterity and the accuracy of his movements due to his genetic reserves, 2) he can become a very inconvenient opponent being a left-handed person.

5.5.5.3. It is reasonable to use the method and the results of the leading hand diagnostics when solving agronomic problems in industrial activity and also in the process of engineering-psychological constructing the systems “man – machine”.

5.5.5.4. When working with children the diagnostics of leading hand helps to avoid a violent alteration of a left-handed child into a right-handed one, which is fraught with the inhibition of a child’s development.

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