As per the reference below* the results of 'Smart Infotainment User Interfaces' it of great interest. The authors conducted the experiment with two scenarios. One with Standard user interface found in many cars and another with customized user interface. Response time was measured in both scenarios. In the first case average response time to operate the user interface turned out to be 3.8s to do a specific operation. When they made the participants drive the car using customized (personalized) user interface, average response time was reduced to 1.7s. This is less than half of the first scenario.
The response time is directly proportional to the distraction caused since it is the amount of time the driver keeps working on the secondary task rather than focusing on the road. Reducing the response decreases the driver distraction. They also measured number of errors made during driving in both scenarios. It was found that the ratio between numbers of errors made by the driver when operating with the standard user interface to customized user interface is 7:3. There was a reduction of errors by 57% in customized user interface. From the analysis of readings taken during experiment, they say with 95% confidence level statistically that response time with customized user interface is better than standard user interface. Also errors with customized user interface are less than standard user interface. Hence Customized UI would be easier to interact and reduces driver distraction drastically so the driver distraction with customized user interface is less than standard user interface. For the full study, the methodology used and the measurements, please follow the link provided below.
*https://www.researchgate.net/publication/323376687_Using_Artificial_Intelligence_to_Automatically_Customize_Modern_Car_Infotainment_Systems
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