The Design of Buttons in MMO Mobile Game's Battle Interface

Abstract

This study investigates the relationship between both-hand input area and time delay before effective inputs, the relationship between button size and hit accuracy, as well as the influence of button size on users’ perception of the ease of button touching despite the size of the touchable area. The lower-left-hand area with x coordinates between 28 mm to 36 mm is the optimal input area for left the hand and the lower-right-hand area with x coordinates between 30 mm to 40 mm is the most ideal input area for the right hand. The input area with a time delay of 400 ms on the right is slightly larger than the one on the left. When the button with a diameter of 9 mm is placed in the lower-right-hand corner with a x coordinate between 20 mm–50 mm, we can expect a hit rate of 90%. Users’ perception of how easy a button is to touch is mainly related to the button size instead of the size of the touchable area. These findings provide a reference for designing buttons in landscape-orientation MMO mobile games and quantitative suggestions for the sizes of touch input area and button in landscape-orientation MMO mobile games. Based on these insights, game producers and designers can create better user experience for MMO mobile games’ battle interface.