Master of Arts (MA)
First Committee Member
Mark A. Ashcraft
Second Committee Member
David E. Copeland
Third Committee Member
Fourth Committee Member
Number of Pages
The following paper presents a study investigating adult number line estimation patterns through use of an eye tracker. Estimation patterns were examined by changing the range of the number line on which the estimations occur from the typical ranges of 0-100 and 0-1000 to a more difficult range of 0-723. There were two main conditions of the experiment; in one condition the number to estimate and the number line were presented simultaneously, and in the other condition, the number line presentation was delayed. In each of the two conditions of the experiment, eye fixations and area of interest analysis were examined to help reveal the mathematical processes behind number line estimations, specifically how these estimations are formed. It was predicted that the 723 line would have significantly more errors and take longer to complete than the 1000 line. The results provide evidence that cognitive processes are involved in estimation and that estimation is in fact a slow process.
Cognition; Eye Tracking; Math Cognition; Number Line Estimation; Psychophysics
University of Nevada, Las Vegas
Salas, Sarah Ann, "What do we see: number line estimation with eye tracking" (2015). UNLV Theses, Dissertations, Professional Papers, and Capstones. 2578.
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