Show simple item record

dc.contributor.authorEllsworth, Lynne A.en
dc.date.accessioned2014-03-14T21:36:28Zen
dc.date.available2014-03-14T21:36:28Zen
dc.date.issued1993-05-05en
dc.identifier.otheretd-05192010-020131en
dc.identifier.urihttp://hdl.handle.net/10919/42750en
dc.description.abstractResearchers have struggled with the problem of obtaining an "accurate" operational definition of drowsiness. Drowsiness is difficult to define because it may involve many different indicators, such as different physiological measures. This thesis consists of two separate, but related, experiments to determine an optimal method of determining whether or not an individual is drowsy via physiological and observed measures. The first part of the experiment used behaviorally trained observers to rate different subjects on the level of drowsiness observed. The data collected showed that trained raters are relatively consistent when rating drowsiness. The second part of the experiment tried to determine if there is a good physiological model to predict performance impairment due to drowsiness by collecting data on sleep deprived subjects. The subjects were given two interleaved tasks, low level and high level cognitive tasks, to perform while twenty-one performance and behavioral measures were collected. The results show that a regression model can be developed using eyelid closure measures, simple EEG measures and simple heart-rate measures to predict performance impairment due to drowsiness.en
dc.format.extentxi, 257 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.isformatofOCLC# 29046634en
dc.relation.haspartLD5655.V855_1993.E458.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1993.E458en
dc.subject.lcshSleep -- Evaluationen
dc.subject.lcshSleep -- Stagesen
dc.titleExperimental evaluation of subjective ratings of drowsiness and development of drowsiness definitionsen
dc.typeThesisen
dc.contributor.departmentIndustrial and Systems Engineeringen
dc.description.degreeMaster of Scienceen
thesis.degree.nameMaster of Scienceen
thesis.degree.levelmastersen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.disciplineIndustrial and Systems Engineeringen
dc.contributor.committeechairWierwille, Walter W.en
dc.contributor.committeememberKemmerling, Paul T. Jr.en
dc.contributor.committeememberPrice, Dennis L.en
dc.type.dcmitypeTexten
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-05192010-020131/en
dc.date.sdate2010-05-19en
dc.date.rdate2010-05-19en
dc.date.adate2010-05-19en


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record