Performance of concurrent tasks: a psychophysiological analysis of the reciprocity of information-processing resources.
The resources allocated to a primary and secondary task are reciprocal. Subjects performed a tracking task in which the discrete displacements of the tracking cursor could be used to elicit event-related brain potentials. As the resource demands of the tracking task were increased, potentials elicited by the task-defined events increased in amplitude, whereas those elicited by secondary task auditory stimuli decreased.
D005071:Evoked Potentials; D005260:Female; D006801:Humans; D008297:Male; D011597:Psychomotor Performance; D013850:Thinking