Abstract
The Trail Making Test A (TMT-A) is a task related to visual search. Therefore, performance in the TMT-A has a high possibility of being influenced by visual information, such as the arrangement of numbers. The purpose of this study was to measure eye movements during the TMT-A using an eye tracker, to analyze differences in enforcement and trace execution, and to examine appropriate inspection drawings as visual search tasks. Study 1 was performed in 14 young healthy subjects and Study 2 was performed in 6 young healthy subjects. The English and Japanese versions of the TMT-A were administered as usual and the subjects performed the traces in a sitting position. The eye movements of the subjects were measured during the task. We analyzed the combined motion angles of both eyes. We compared the average values (30 Hz/s) of movement in the horizontal (X-axis) and vertical (Y-axis) directions during the normal administration of the English and Japanese version of the TMT-A. We also compared the traces performed by the subjects. There were no differences in tracing or enforcement in the English version of the TMT-A. Especially in the vertical visualization operation, it was shown that the normal enforcement was fewer than the tracing, and almost no up-to-down search was performed. In contrast, the subjects performed visual searches in all directions during the Japanese version of the TMT-A.
Highlights
In Study 1, which used the English version of the Trail Making Test A (TMT-A), the average eye movement angle in the X-axis was 0.882 ̊ ± 1.854 ̊ during normal implementation and 0.757 ̊ ± 2.634 ̊ during tracing enforcement
There were no significant differences in eye movements between the “normal enforcement” and “tracing enforcement” tasks in the English version of the Trail Makin Test (TMT)-A
There was no significant difference between “normal enforcement” and “trade enforcement” in the English version of TMT-A, which was administered in Study A
Summary
Deficits in high-order brain functions, such as memory disorder, attention dis-. The Trail Makin Test (TMT) is used worldwide as a test for attention disorder. The TMT-A in particular involves a visual search task. It is not always possible to selectively evaluate attention using the TMT-A, as performance in this task may be affected by various factors, including visual information. The numbers seem to be arranged relatively regularly in the vertical direction for several seconds (up to 12) in the English version of the TMT-A, while no such regularity is observed in the Japanese version of the test. Gaze analysis during the TMT would enable us to study whether the TMT-A is a visual search task or affected by factors other than visual search
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