Accession Number : ADA326465

Title :   Evaluation of a Range of Target Blink Amplitudes for Attention-Getting Value in a Simulated Air Traffic Control Display.

Descriptive Note : Final rept.,

Corporate Author : FEDERAL AVIATION ADMINISTRATION OKLAHOMA CITY OK CIVIL AEROMEDICAL INST

Personal Author(s) : Milburn, Nelda J. ; Mettens, Henry W.

PDF Url : ADA326465

Report Date : APR 1997

Pagination or Media Count : 10

Abstract : Several sources suggest that blinking targets are more alerting than steady targets. Those sources recommend target size, color, shape, brightness contrast, frequency of blink, and parameters for the ratio of time the blink should be 'on,' relative to the time it is 'off' However, no guidelines were found for an effective, attention-getting blink amplitude (the percentage of decrease in target brightness from a standard). Ten participants located and selected the blinking information data blocks (targets) from 16 data blocks on a Simulated Air Traffic Control Display. Seven blink amplitudes, ranging from 12.5% to 100%, were evaluated. Error and response time performance were near optimum for conditions involving a 75% to 100% decrease in brightness. For the standard luminance (51.4 Cd/m2), frequency (2 HZ), and duration (.10 sec) used in this experiment, a decrease in brightness of at least 75% was necessary for maximum attention-getting value of a blinking target.

Descriptors :   *TARGETS, *AIR TRAFFIC CONTROL SYSTEMS, *CATHODE RAY TUBES, STEADY STATE, RATIOS, CONTRAST, SIZES(DIMENSIONS), REACTION TIME, TIME, BRIGHTNESS, LUMINANCE.

Subject Categories : Computer Hardware
      Air Navigation and Guidance

Distribution Statement : APPROVED FOR PUBLIC RELEASE