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U-shaped development
U-shaped development, also known as U-shaped learning, is the typical pattern by which select physical, artistic, and cognitive skills are developed. It is called “U” shape development because of the shape of the letter U in correlation to a graph, skills developed in the “U shaped” fashion begin on a high position on a graph’s Y-axis. The skills start out at a high performance level and over time the skills descend to a lower position on the Y-axis. After another period of time the skill once again ascends to a higher position on the y-axis. A "U" shaped time line is created of the skills development.
U-shaped development can be seen in cognitive skills such as learning new words, or doing high level algorithms in mathematics. The skill can also be artistic such as painting or playing a musical instrument, and physical skills such a walking and weight lifting.
==Artistic skill development==
This U-shaped curve is different from the other types of skill development because this skill has an artistic rating with it, which means there could be differences in opinion, but in studies where children, adult artists, and non-artist adults were all given the same directions to draw a self portrait, the children’s and the artists' were the closest of the three to depicting the face when picked by an outside group.〔 In theory, this result is because of an innate “creative skill” in children that is either lost to age with non-artist adults or practiced by adult artists. In artists the Y-axis would be the “creative skill”, and the X-axis would be time, but in non artists the “U” shaped curve would not apply.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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