Under distraction, reflecting the impact of secondary tasks. Thus, the older drivers' SDLP was ~14% higher than that for the baseline average of all the other drivers and rose to 29% Also, compared to the baseline, texting WhatsApp messages while driving worsens driving performance for all age groups, most notably among older participants. The results showed a significant main effect of age for the driving-performance parameters. The analysis indicated that functional changes occurring with age, such as a lower contrast sensitivity and greater retinal straylight, were correlated with a higher number of collisions, longer distances driven outside the lane, and greater standard deviation of lateral position (SDLP). Lastly, objective results of driving performance were compared with subjective self-report data from the Driver Behaviour Questionnaire (DBQ). The participants used their own mobile phone.
Simulated driving performance was assessed under a baseline driving condition (without distraction) as well as a texting condition (WhatsApp messages) while driving. Visual-function tests included contrast sensitivity with and without glare, retinal straylight and objective assessment of optical quality.
A total of 75 drivers, experienced in sending WhatsApp messages (≥10WhatsApp messages/week), participated in this study and were divided into four age categories. Because distracted driving also affects older drivers, who can have seriously compromised vision, we also analysed the associations between visual-function parameters and driving performance. This paper investigates the effect that texting with WhatsApp, one of the most common applications for instant messaging, exerts on driving performance.
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