Coding Updated alpha-Numeric Information in Individual and Group Displays

摘要

The principal objectives were to evaluate the effects of conspicuity coding of updated information and to compare the relative effects of individual and group displays. Subjects were required to locate coded and uncoded updated alpha-numeric information. Amount of information presented and amount of information updated were varied. It was found that: (1) Mean time required to locate coded updates was about 65% shorter than the time required to locate uncoded updates. (2) Location times for coded updates were essentially equal for individual and group displays, but mean time required to locate uncoded updates was about 15% shorter with individual than with group displays. (3) Use of coded updates resulted in a reduction of errors by about 50%. (4) Errors of omission exceeded errors of commission by more than 3 to 1. Findings lend support to the incorporation and use of coding capabilities in current and proposed command systems. While findings regarding individual vs group displays are not conclusive, they do suggest that if uncoded updated information is presented, there may be a whole series of information assimilation tasks which can be more efficiently accomplished with individual than with group displays.