%0 Journal Article
%T Attention function structure of older and younger adult drivers
%J Proceedings of the ... international driving symposium on human factors in driver assessment, training and vehicle design
%D 2009
%A Tuttle, Stephanie
%A Cassavaugh, Nicholas D.
%A Backs, Richard W.
%V 5
%N 
%P 506-513
%X Groups of younger (n=49, M age = 21.7 years) and older (n=52, M age = 73.0 years) adults performed computer-based cognitive tests and simulated driving. Results from the cognitive tests were submitted to Principal Components Analysis (PCA) and 6 components were extracted that explained more than 77% of the variance. The components were labeled speed, divided, sustained, executive, selective/inhibition, and visual search in descending order of amount of variance explained. The component scores were used to predict simulated driving performance. Hierarchical step-wise regressions were computed with driving performance as the criterion, and age group (forced) and the component scores (step-wise) as predictors. Results showed that the speed and divided components were more likely to explain additional driving performance variance beyond age group than the other components.<p />
%G 
%I University of Iowa Public Policy Center
%@ 
%U http://dx.doi.org/