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ERIC Number: ED539349
Record Type: Non-Journal
Publication Date: 2012
Pages: 7
Abstractor: As Provided
Reference Count: 23
ISSN: ISSN-1548-6613
Examining the Differences of the 8th-Graders' Estimation Performance between Contextual and Numerical Problems
Yang, Der-Ching; Wu, Shin-Shin
Online Submission, US-China Education Review A 12 p1061-1067 2012
Two 12-question estimation instruments were designed to compare the differences of estimating strategies used by the 8th-graders when solving contextual and numerical problems. Both instruments are parallel, meaning that the numbers used in both instruments are the same; however, they were presented differently. One hundred and ninety-eight 8th-graders in southern Taiwan were selected to participate in this study. The correct percentage for the numerical problems and contextual problems were 45% and 33%, respectively. The t-test result shows a significant difference for the estimation performance between contextual and numerical problems at alpha = 0.05. This implies that these 8th-graders perform significantly better on numerical problems than that of contextual problems. In addition, the t-test results show that there is a significant difference in the performance of reformulation, transformation, and compensation dimensions for numerical and contextual problems at alpha = 0.05, respectively. The results show that students performed better on numerical problems than on contextual problems for each dimension. In addition, data show that students tended to use the written method to solve numerical and contextual problems instead of estimation. Implications are discussed. (Contains 3 tables.)
Publication Type: Journal Articles; Reports - Research
Education Level: Grade 8
Audience: N/A
Language: English
Sponsor: National Science Council (Taiwan)
Authoring Institution: N/A
Identifiers - Location: Taiwan