Objective: To examine relationships among the reaction time, dominant eye, and number of gazes/target region when performing a mental rotation task.
Methods: A total of 12 (5 males and 7 females; mean age: 21.3±1.7) healthy university students, 5 and 7 of whom were right- and left-eye dominant, respectively, performed a mental rotation task, and their reaction times, numbers of gazes, and target regions were recorded using an eye-mark recorder. During the task, an image of a hand was presented, and the students inferred the side of the hand from it.
Results: The reaction time was shorter and number of gazes was lower in the left- compared to right-eye dominant group. The reaction time was correlated with the total number of gazes in each target region; the lower the number of gazes, the shorter the reaction time. There were no marked differences in the target region between the 2 groups. On analysis using the VAS, no correlation was observed between the difficulty/fatigue level and reaction time/dominant eye.
Discussion: The dominant eye markedly influenced the visual recognition of objects, suggesting that visual information processing in the brain, rather than visual input, is responsible for differences between right- and left-eye dominant groups.
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