Prediction model of pointing time by a mouse based on characteristics of cursor movement trajectory

This study attempted to more accurately model the pointing time of a mouse based on the detailed analysis of the cursor movement trajectory. The predictive model was developed by considering the movement direction and target size. The mouse cursor movements were divided into three phases, i.e. (i) the increasing phase of cursor movement speed, (ii) the decreasing phase of cursor movement speed, and (iii) the homing phase. In each phase, the relationship between the distance to a target center and the duration of each phase was derived empirically. The duration of phase (i) was not affected by either direction of movement or target size. The duration of phase (ii) was influenced by movement direction only. The duration of phase (iii) was influenced by target size only. As a result of such modeling, the predictive power of the model was further improved (R2 increased from about 0.75 to about 0.95 for all four movement directions).

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