Accession Number:

AD0408279

Title:

EXPERIMENTAL STUDIES OF HUMAN VIGILANCE

Descriptive Note:

Final rept.

Corporate Author:

ILLINOIS UNIV AT URBANA AVIATION PSYCHOLOGY LAB

Personal Author(s):

Report Date:

1963-02-01

Pagination or Media Count:

45.0

Abstract:

A series of experiments was conducted on human vigilance or the characteristics of long-term human attentiveness for the occasional occurrences of signals which are to be detected and reported. Emphasis was given complex visual displays with multiple stimulus sources and alpha-numeric signals of the general class found in semi-automatic man-machine systems. The results were that 1 vigilance decrement usually occurs in small but reliable amounts within a session but does not increase as a function of number of daily sessions, 2 only response produced stimuli from simple decision behavior were a source of stimulation that deterred vigilance decrement in accord with the arousal hypothesis, 3 temporal uncertainty was not associated with differential vigilance decrement although spatial uncertainty appeared to be under some circumstances, and 4 feedback about the operators proficiency after each response was a training method that improved monitoring behavior in a stable manner.

Subject Categories:

  • Psychology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE