抄録
In order to find effects of the period of practice, history of individuals and the hardness of cloth on the sewing efficiency, straight line sewing tests were performed to a group of junior college girls. Thirty-six freshmen and 32 sophomores were divided into two groups; one had gained the third or higher licence to manipulate abacuses, and the other not. A part of tests was repeated five times to every girl using hard cotton cloth and soft acetate cloth.
In consequence, it is concluded that,
1. Group of sophomores is superior in overall length of sewing at the limited time, to that of freshmen at the 1% significant level statistically.
2. Superiority in the number of stitches is also detected in the sophomores' group at the 1% significant level.
3. Accuracy of stitches is significantly better at 5% level in the freshmen group than in the sophomores'.
4. Group possessed licence have higher sewing efficiency than other group at 5% significant level.
5. Freshmen have higher sewing efficiency for hard cloth than for soft one. On the contrary, as to sophomores the result is opposite.
