A Research On Development Of "More Or Less" Concept

In this research, the individuals are tested in a quantitative decision task with stimuli varied in number from 2 to 30 or from 5 to 100 .It is shown that: Firsly, the concept of "more or less" varies in the individual' s ages. The turning point of quantitativen decision is from 5 to 7. Over 7 years old of age, the quantitative standard that the individuals adopted to decide "more or less" also develop gradually with the growth of age . The critical values, the mminimum quantity of deciding "more" and the maximun quantity of deciding "less" all increase with the growth of the indivdual' age. Secondly, the range of the quantity as well as the stardard used to decide "more or less" of the same age are different. The quantitative decision of the dots ranging from 5 to 100 is bigger than that of the dots ranging from 2 to 30. Namely the critical value, the quantitative range, the minimum quantity of deciding "more" and the maximum quantity of deciding "less" in the stimuli of 5 to 100 is bigger and more remarkable than the dots ranging from 2 to 30.Thirdly, the range between the maximun and the minimun quantitative standard is dwindled with the increasing of age. Namely, the differential value between the minimum quantity of deciding "more" and the maximum quantity of deciding "less" will be reduced gradually.