Redundancy Gain or Cost? Performance Effects of Redundantly-encoded Tactile Displays in Multitask Scenarios Conference Paper uri icon


  • Copyright 2014 Human Factors and Ergonomics Society. Redundant displays, those that display the same message via multiple sensory channels, are widely accepted as beneficial based on the idea that redundancy offers the potential to effectively distribute processing resources and thus avoid the overload of a high-demand processing channel. While some studies have found performance gains with use of redundant displays, others have shown performance costs. This study investigated whether redundancy in a "multi-code" display - which allows message decoding by engaging either spatial or nonspatial processing resources - would produce redundancy gains or costs under varied concurrent task processing requirements. Results showed dual-task performance was worse when tasks required the same processing code. Redundantly-encoded signals displayed promise for reducing processing interference, a performance gain, but may also negatively affect performance due to a higher overall processing load. The findings illustrate the effects of processing code redundancy on multitasking performance and add to the body of knowledge in information processing.

author list (cited authors)

  • Ardoin, W., & Ferris, T. K.

citation count

  • 1

publication date

  • September 2014