Object: 68 elementary school children, boys 44, girls 24 <br>In this study, visual tracking test (Visual Pursuit Test, LVT) S2 : a short version (Figure 40) whose main function is to measure the concentration of target visual perception. A total of 40 questions the test questions, the test method is relatively complex in a graphical environment, to the trajectory along the traveling mode from the starting point to an end, the ability to test the visual direction, indicated by the starting point of the test subject according to the starting point on the line of FIG ,, red arrow to end Analyzing numerals 1 to the end that a number of 9 on a position.
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