Trade-off relationship between width and depth of visual information processing in measurement of functional visual field

A method to measure the functional visual field was proposed, and the trade-off between the width of functional visual field and the depth of cognitive information processing was quantitatively verified. The missing rate on the peripheral vision tended to increase with the increase of both task complexity on the foveal vision and visual angle. The percentage correct of the addition task at the foveal vision tended to decrease with the increase of the visual angle of the peripheral stimuli. The percentage correct, however, did not differ among four levels of task complexity. It tended that the response time to the peripheral stimuli increased with the increase of the task complexity. These results indicated that the visual resource available for visual information processing was limited. On the basis of these results, we empirically propose a quantitative model that can explain the trade-off relationship between the width of functional visual field and the depth of cognitive information processing