The objective of this study was to develop a method that
measures mental workload using video fragments, and to
determine its usability in mental workload research. The
developed method has shown to be surprisingly sensitive.
This is shown from the high number of effects that were
found, even though the driving difficulty in all situations was
low to moderate at best and driving performance was always
(near) optimal. The method developed in this study shows
potential to be used as a valid and sensitive workload
measurement method. Given the promising first results of the
Video based Workload Measurement it is recommended to
further develop the method an in particular test the validity of
the instrument. One way to test the validity of the Video
based Workload Measurement method could by comparing
the results of the Video based Workload Measurement
method to direct physical measures of mental workload.