ERIC Number: ED197963
Record Type: RIE
Publication Date: 1980-Nov
Reference Count: 0
Identification and Characterization of Computational Estimation Processes Used by Inschool Pupils and Out-of-School Adults. Final Report.
Reys, Robert E.; And Others
This study focuses on the mental processes used during estimation. This research: (1) developed an operational definition of estimation; (2) created an instrument to identify exceptionally good estimators; (3) collected performance level data on 1187 subjects; (4) constructed interview problems and developed protocols to identify the thinking processes used by people doing computational estimation; (5) collected interview data from subjects; and (6) synthesized the interview data and organized them into a framework that provides a model for future researchers. Time for response per item was minimized in order to maximize the chance that estimation was measured. An Assessing Computational Estimation test was created based on guidelines gathered from a review of relevant research. Characteristics of good estimators were hypothesized, and both student and adult subjects were selected based on this model. Three key processes, labeled translation, reformulation, and compensation, were identified that seemed closely associated with good estimation skills. Strategies intertwined with these processes included forms of rounding and truncation. Further details of the estimation process and samples of the testing and interview packets are also included. (MP)
Publication Type: Reports - Research
Education Level: N/A
Sponsor: National Inst. of Education (ED), Washington, DC.
Authoring Institution: Missouri Univ., Columbia.
Identifiers: Estimation (Mathematics); Mathematics Education Research
Note: Contains occasional small, light, and broken type. Page 90 missing from document prior to its being shipped to EDRS for filming.