In order to attract users' attention and improve the efficiency of interaction

adjusting the position and increasing the area of interface elements is very common in adaptive interface. In this paper

we studied the cognitive characteristics of people in the process of the change of regional location and the increase of regional area of the adaptive interface

which provides guidelines for the design of the adaptive interface. Ergonomics experiments were designed to make the interface adaptive items randomly switch between the middle position and other locations

as well as the original area interface and the enlarged area interface. The subjects were asked to complete the visual search task

and the reaction time and accuracy of the subjects were recorded. The results show that the direction (up

down

left and right)

and the distance have significant effects on the reaction time. The eye movement heatmap shows that subjects are more sensitive to change in the direction of the up and down. Under the experimental conditions

the adaptive change distance of the interface items in the up and down directions can not exceed 12.5% of the screen size; the change distance cannot exceed 25% of the screen size in the direction of left and right. When the increase is greater than 125% of the original area

the dynamic switching factor has a significant effect on the reaction time

so the proportion of area increase can not exceed 100%.