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- W2321342601 abstract "1. Problem of Handedness: Men are mostly right-handed, and left-handedness is exceptional, and as such it becomes a problem of interest and scientific research. But no definite theory of its origin and real nature has been established. The question of handedness has to be considered from two different angles. They are unilateral preference and unilateral superiority. Though they are inseparably united in the actual cases, one refers to native tendency of using one hand in preference to the other, if it is native at all; and the other to the combined results of such tendency and post-natal practice.This study aims to approach this question of handedness through the survey of the actual difference in the capacities of the two hands. And this question can be treated under three main headings.(1) The actual. facts of bilateral difference and the frequency and degree of handedness.(2) The causes of handedness.(3) Physical and mental characteristics of the left-handed.2. Experiment: We chose five different kinds of tests-(1) grip, (2) tapping for 30 seconds, (3) peg-board for 1 minute, (4) tracing a star drawn with double lines (3 mm apart) with pencil, and (5) cutting with scissorsand administered to the entire group of children of one primary school, 801 in all, of whom 416 were boys and 391 were girls.3. Results and Conclusions: This report includes only the first three tests mentioned above, The percentage of the capacities of the left hand to the right hand (i.e. L/R×100) was calculated and we called this an index of left-handedness.(1) The average of motor capacities of each school year for boys and girls are given in Tables 1, 2 and 3.(2) According to the average of. the capacities of both hands the relative efficiency of the left to the right is as follows. Grip Tapping Peg Board Boys 96.58% 86.50% 91.54% Girls 93.71% 87.17% 90.87%(3) The percentage of children who show the left-hand superiority is as follows. Index of Grip Tapping Peg Board Left-handedness No. % No.% No.% above 101 Boys 1 19 31.32 29 7.60 70 18.92 above 101 Girls 92 25.20 21 5.74 56 15.56(4) The number of individuals who show left-band superiority in one, two, or three kinds of tests is 43.31 for boys and 38.25 for girls.(5) The number of children reported as left-banded by teachers in charge is 30 (7.2 %) for boys and 20 (5.1%) for girls.(6) There is no difference of the total capacity of both hands between the right-handed and the heft-handed children.(7) For one hand only the order of efficiency is as follows-1st right hand of the right-handed, 2nd left hand of the left-handed, 3rd right hand of the left-handed, and 4th left hand of the right-handed.(8) The difference of the two hands is most marked in the speed of movement and not so marked in the strength.(9) The difference of the two hands is greater with girls than with boys(10) This research indicates that the frequency and degree of handedness do not regularly increase or decrease with the age-level." @default.
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- W2321342601 date "1935-01-01" @default.
- W2321342601 modified "2023-10-18" @default.
- W2321342601 title "Experimental Study of Handedness" @default.
- W2321342601 doi "https://doi.org/10.4992/jjpsy.10.889" @default.
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