Effects of capacity demands on picture viewing

Effects of cognitive-resource demands on picture-viewing patterns were investigated. The eye fixations of 72 subjects were recorded as the subjects viewed pictures and concurrently performed one of three listening tasks. Half of the subjects were asked to remember certain objects from the pictures and half had no-memory instructions. Concurrent auditory monitoring increased interfixation distances and the frequency of fixations on regions of high informativeness, and decreased the area of the pictures explored and the memory for objects in the scenes. It is suggested that the demands on cognitive resources influenced subjects' ability to encode and integrate fixated information and therefore prolonged the normal first phase of viewing, described by Buswell (1935).