@article{oai:meilib.repo.nii.ac.jp:00000353,
 author = {栗山, 和広 and 吉田, 甫},
 journal = {宮崎女子短期大学紀要, Bulletin of Miyazaki Women's Junior College},
 month = {Mar},
 note = {Representation of number concepts in three-year-olds children was investigated in the present study. Children were given both reconstruction and composition problems. In the reconstruction problems, children were asked to reconstruct the numbers, which a experimenter presented. When children dealed with numbers 4 and 5, they opened their fingers directly to 3 of the numbers and did the fingers 1 by 1 for the remaining numbers over 3. In the composition problems, children were asked to compose a number with another one. It was significantly easier for children to solve the problems with 2 and 3 as addends than ones with 4 as addend. Furthermore, children depended on direct strategy more often than overt one to the addended number 2 and 3. These results might suggest that three-year-olds children would represent numbers 1 to 3 as a firm structure. These results were discussed in terms of a mental number line in a representational system of numbers., Representation of number concepts in three-year-olds children was investigated in the present study. Children were given both reconstruction and composition problems. In the reconstruction problems, children were asked to reconstruct the numbers, which a experimenter presented. When children dealed with numbers 4 and 5, they opened their fingers directly to 3 of the numbers and did the fingers 1 by 1 for the remaining numbers over 3. In the composition problems, children were asked to compose a number with another one. It was significantly easier for children to solve the problems with 2 and 3 as addends than ones with 4 as addend. Furthermore, children depended on direct strategy more often than overt one to the addended number 2 and 3. These results might suggest that three-year-olds children would represent numbers 1 to 3 as a firm structure. These results were discussed in terms of a mental number line in a representational system of numbers.},
 pages = {17--23},
 title = {幼児の数表象の構造 : 3歳児の数表象について},
 volume = {16},
 year = {1990}
}