Eye Movement Features in response to Comprehension Performance during the Reading of Programs

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Some features of eye movement during the reading of program code were analysed in order to develop a procedure to assess viewer comprehension ability. A set of eye movement data which was created by the measurement of eye movement during the viewing of a code programming project was used. While backward eye movement is natural under normal reading circumstances, this paper focuses on intentional eye movement in the opposite direction of the usual pattern of reading while viewing blocks of code, and the impact of the frequency of this on the comprehension of a code, which was confirmed. In examining the frequency of this reading behaviour, there were significant differences in both overall fixation times and mean saccade lengths for the two levels of comprehension of the code.

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