Cognitive Characteristic Evaluation of CNC Interface Layout Based on Eye-Tracking

In the multi-function computerized numerical control（CNC） processing of furniture, in order to improve operators’ work efficiency, cognitive characteristics and evaluation indices of CNC interface layout design are analyzed. First, based on the process of brain information processing and the principle of space-time proximity, the mapping relationship of layout and cognition in the human-computer interface is built. Then through the user’s perception of information intensity, complexity, guidance, and logicality, cognitive evaluate dimensions and indices of layouts are analyzed. Following this, the visual cognitive experiment of 15 CNC interface layout design are tested by using the eye-tracking technology. According to the eye movement data and accessibility model of the transportation network, the calculation equations of go-back time rate, refixation rate, saccadic duration rate, and accessibility are deduced. Finally, the layout evaluating indices those the paper suggests are tested with the correlation analysis method, and the cognitive efficiency of layout design are analyzed with the ANOVA and least-significant difference methods. Experimental results show that, the search time, fixation count, refixation rate, accessibility, and arrangement of fixation points can be used to evaluate the layout cognitive efficiency. In order to reduce the information intensity and to increase the information guidance and logicality of the CNC interface, the"return" and "T" layouts are the best to choose, followed by the multiple column and matrix layouts. The up and down layout is the worst, as well as the no column layout.