Accession Number:

ADA151683

Title:

Shape with and without Redundant Colour as Coding Mechanism for Simulated Radar Displays in a Time-Extended Simple Vigilance Task.

Descriptive Note:

Master's thesis,

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s):

• Hessling,U.

Report Date:

1984-09-01

Pagination or Media Count:

63.0

Abstract:

In this thesis a simple monitoring task was extended to eight hours to achieve a higher realism in testing human vigilance. An extremely low stimulus frequency, the confinement of the subjects during the test run, and the scheduling experiment from 1000PM to 600AM were further tools to create a more operational environment. Subjects were treated in one of two conditions, simulating a shipborne tactical radar display with precoded information, to test a currently operational shape coding mechanism control condition for positive effects due to the addition of redundant colour codes experimental condition. The results did not support the hypothesis of positive effects in the experimental condition. In fact, the number of ommissions was significantly higher in that condition. Longer reaction times in both conditions were found to be correlated to higher signal and display densities. Originator-supplied keywords Vigilance task, Redundant colour, Operator performance, Underload, Nighttime, Codes, Shape, and Achromatic.

Descriptors:

• *MONITORING
• *VIGILANCE
• *DISPLAY SYSTEMS
• *RADAR EQUIPMENT
• SIMULATION
• DENSITY
• PERFORMANCE(HUMAN)
• HUMANS
• REACTION TIME
• SHAPE
• THESES
• RADAR
• CODING
• SIGNALS
• COLORS
• TACTICAL RECONNAISSANCE
• SHIPBOARD
• CONFINEMENT(GENERAL)
• HYPOTHESES
• STIMULI
• OPERATORS(PERSONNEL)
• REDUNDANCY
• TACTICAL DATA SYSTEMS
• EXTREMELY LOW FREQUENCY

Subject Categories:

• Stress Physiology
• Active and Passive Radar Detection and Equipment
• Human Factors Engineering and Man Machine Systems

Distribution Statement:

APPROVED FOR PUBLIC RELEASE