Fig. 8From: Talking to your car can drive you to distractionMean NASA TLX ratings for the six sub-scales for the first testing day (Session 1) and the last testing day (Session 2). Error bars reflect the 95 % confidence interval around the point estimate. A rating of 0 reflects a very low level of workload and a rating of 21 reflects a very high level of workloadBack to article page