Pupil diameter and the cross-adaptive critical tracking task; a method of workload measurement
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Authors
McFeely, Thomas Edward
Subjects
compensatory tracking
human engineering
human response
manual control
psychophysiological response
pupillometry
reserve capacity
workload
human engineering
human response
manual control
psychophysiological response
pupillometry
reserve capacity
workload
Advisors
Hess, Ronald A.
Date of Issue
1972-06
Date
June 1972
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
Two new applications of established techniques for measuring
an individual's level of stress (workload) in tracking
tasks are presented. An indirect technique of measuring
"reserve capacity" is utilized in a two-axis cross-coupled
compensatory tracking task. A direct psychophysiological
measurement is made by recording time histories of operator
pupil diameter.
Results obtained indicate that each method yields a good
index of workload, although considerable variance in the data
is observed. The level of instability in the second axis of
the cross-adaptive method is shown to be related to the level
of workload in the primary axis. Increased pupil diameter is
shown to be similarly related, to operator workload. The
simultaneous application of both techniques is determined to
be inappropriate.
Type
Thesis
Description
Series/Report No
Department
Aeronautics
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.