Effects of Multi-Modal Warning Systems on Elderly Drivers'Perceived Urgency and Comfort

Simple item page
dc.contributor.authorGhosh, Arka Ashoken
dc.contributor.committeechairLockhart, Thurmon E.en
dc.contributor.committeecochairCasali, John G.en
dc.contributor.committeememberRoberto, Karen A.en
dc.contributor.departmentIndustrial and Systems Engineeringen
dc.date.accessioned2014-03-14T21:52:08Zen
dc.date.adate2006-01-05en
dc.date.available2014-03-14T21:52:08Zen
dc.date.issued2005-11-30en
dc.date.rdate2006-01-05en
dc.date.sdate2005-12-23en
dc.description.abstractThe objective of the study was to investigate multi-modality effects (visual and auditory) on the perception of urgency in elderly individuals addressing issues of safety and comfort. Twenty individuals (10 young, 10 elderly) from Montgomery County of Virginia participated in the laboratory study. In the pre-experimental audiometric tests, as expected elderly individuals had higher hearing thresholds (dBHL) than young across all the frequencies (250, 1000, 2000 and 4000 Hz) of pure tones. The difference was more pronounced at 4000 Hz. In visual acuity tests administered, elderly individuals had a lower Snellen VA than young at both near and far distances. The participants also were administered Bausch and Lomb color test; all participants were able to differentiate red color. Method of adjustment was used to collect empirical data. Rating test was administered after every treatment to objectively assess the participants' feeling of perceived urgency associated with the auditory warning signal. All the participants rated the experimental sound as urgent. Repeated measures was conducted to remove variations due to time and treatment conditions. A mixed-factorial design was used to investigate the main and interaction effects. The age effect was found to be marginally statistically significant. Modality and trial effects were not found to be significant. The reanalysis conducted after removal of outliers resulted in marginal statistical significance for age and modality main effects. Although not significant, a trend was seen in the pulse intensity levels (dBL) across modalities in the elderly individuals. Future research should be conducted to investigate modality effects in elderly individuals in a naturalistic driving environment which would give a better insight of the effects of dual modalities.en
dc.description.degreeMaster of Scienceen
dc.identifier.otheretd-12232005-035408en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-12232005-035408/en
dc.identifier.urihttp://hdl.handle.net/10919/46334en
dc.publisherVirginia Techen
dc.relation.haspartMS_Thesis_Abstract_ArkaGhosh.pdfen
dc.relation.haspartMS_Thesis_ArkaGhosh.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectElderly driversen
dc.subjectMulti-modalen
dc.subjectWarningsen
dc.subjectComforten
dc.titleEffects of Multi-Modal Warning Systems on Elderly Drivers'Perceived Urgency and Comforten
dc.typeThesisen
thesis.degree.disciplineIndustrial and Systems Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

Files

Original bundle
Now showing 1 - 2 of 2
Thumbnail Image
Name:
MS_Thesis_Abstract_ArkaGhosh.pdf
Size:
24.06 KB
Format:
Adobe Portable Document Format
Download
Thumbnail Image
Name:
MS_Thesis_ArkaGhosh.pdf
Size:
1003.77 KB
Format:
Adobe Portable Document Format
Download

Collections

Masters Theses