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1. On page 111, the authors have described a method to assess driver distraction. In this method, participants maintained a white square size on a forward display by using a game gas pedal of like in car-following situation. The size of the white square is determined by calculating the distance to a virtual lead vehicle. The formulas to correct are used to explain variation of acceleration of the virtual lead vehicle. The authors inadvertently incorporated old formulas they had used previously. In the experiments discussed in the article, the corrected formulas were used. Therefore, there is no change in the results. The following from the article:

We have developed a bench test method to assess driver distraction caused by the load of using infotainment systems. In a previous study, we found that this method can be used to assess the task loads of both visual-manual tasks and auditory-vocal tasks. The task loads are assessed using the performances of both pedal tracking task (PT) and detection response task (DRT) while performing secondary tasks. We can perform this method using simple equipment such as game pedals and a PC. The aim of this study is to verify the reproducibility of the PT-DRT. Experiments were conducted in three test environments in which test regions, experimenters and participants differed from each other in the US, and the test procedures were almost the same. We set two types of visual-manual tasks and two types of auditory-vocal tasks as secondary tasks and set two difficulties for each task type to vary the level of task load.

This paper examines driver receptivity to an aspheric mirror, which contains an outer part with gradually-changing curvature and a flat inner part that we developed to reduce blind spots on the side and to the rear of the driver side of a vehicle. Reflection in a mirror where curvature changes gradually can, generally, cause binocular rivalry depending on curvature settings. We compared this mirror with a conventional mirror under actual driving conditions in the market to examine the levels of burden an aspheric mirror imposes on the driver in three categories of subjective measures: cognitive burden (effort), misrecognition, and physical burden. In terms of the cognitive burden (effort) and misrecognition, it was shown that an aspheric mirror can be used, after learning how to use it, with the same level of burden as a conventional mirror. As for the physical burden, it was indicated that there is no special type of burden that is specific to aspheric mirrors.