Abstract
The effect of experimentally induced cognitive fatigue on divided spatial attention was assessed
on a convenience sample of 30 participants, who participated in a dual attention/observation
task. Participants were randomly assigned to an “Observer” (Obs) or a “Stimulus Provider”
(SP) group. Both groups completed a computerised attention task. The SP group received audio
cues to look left, middle or right. The Obs group were asked to note the time and direction they
observed the SP group move their head while completing the task. Mental fatigue was induced
by the experimental duration (two 25 minute trials). It was hypoFinal Year Projected that as mental fatigue
increased, a greater number of errors in one or both of the cognitive tasks would occur, with a
corresponding decrease in reaction times. Analysis of these results and their implications in the
understanding of the role fatigue in dual-tasking will be discussed with regard to theory and
application. Author keywords: cognitive fatigue, divided spatial attention, attention
