A human performance evaluation of graphic symbol-design features.

Area of Science:

• Human-Computer Interaction
• Cognitive Psychology
• Information Design

Background:

• Effective tactical displays rely on clear and rapidly interpretable symbols.
• Symbol design significantly impacts user performance in time-sensitive environments.
• Understanding cognitive processes in symbol recognition is crucial for optimizing display design.

Purpose of the Study:

• To compare the performance of conventional versus iconic symbols in tactical displays.
• To evaluate the effect of additional feature information on symbol processing speed and accuracy.
• To identify key symbol design features that minimize perceptual interference and enhance tactical concept portrayal.

Main Methods:

• 16 subjects learned two symbol sets: conventional and iconic.
• Participants performed tasks involving symbol identification, search, comparison, and pattern recognition.
• Performance metrics included processing speed and accuracy across different symbol configurations and feature codings.

Main Results:

• Conventional symbols resulted in faster pattern recognition than iconic symbols.
• Iconic symbols did not offer faster identification performance compared to conventional symbols.
• Incorporating additional feature information (perimeter density, vector projection) slowed processing in four tasks.
• Specific symbol design features reduced perceptual interference and better matched tactical concepts.

Conclusions:

• Conventional symbols are superior for pattern recognition in tactical displays.
• Overly complex symbol designs with added features can hinder cognitive processing.
• Careful selection of symbol design features is essential for effective tactical display usability and communication.