The effects of age, illumination, and anti-glare treatments on visual task performance and perceived image quality with VDTs

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dc.contributor.authorDowning, Jacqueline Victoriaen
dc.contributor.committeechairSnyder, Harry L.en
dc.contributor.committeememberKroemer, Karl H.en
dc.contributor.committeememberSinger, Len D.en
dc.contributor.committeememberKelly-Harrison, Patti L.en
dc.contributor.committeememberDryden, Robert D.en
dc.contributor.departmentIndustrial Engineering and Operations Researchen
dc.date.accessioned2015-07-09T20:43:48Zen
dc.date.available2015-07-09T20:43:48Zen
dc.date.issued1989en
dc.description.abstractThis dissertation investigated the effects of age on performance and image quality rating while varying screen surface treatment, ambient lighting, and character resolution. Five age groups were included, ranging from 18 to 69 years of age. The study used a factorial design to vary seven surface treatments which either reduced glare, enhanced contrast, or both; three lighting conditions, dark, diffuse, and specular; and two character resolutions, high and low, subtending visual angles of 16.1 arcmin. and 32.2 arcmin. respectively. Performance was measured using both a speed of reading task and a search task. In addition, subjects rated the image quality of displayed characters within each filter, lighting, resolution condition using a list of nine adjectives. Results showed performance times to increase with age. The older age groups (40-49, 50-59, 60-69) performed better with the quarterwave filter, which enhanced contrast and reduced glare, and most poorly with the filters with the harshest etch (Gloss25) and the lowest transmission (31%). Performance was significantly slower for specular and dark lighting. A finding consistent with previous research indicated that extremely high luminance contrast degrades performance with low room illumination. Finally, for all conditions in which resolution was a factor performance was fastest and ratings were highest with the low resolution characters.en
dc.description.degreePh. D.en
dc.format.extentxiii, 151 leavesen
dc.format.mimetypeapplication/pdfen
dc.identifier.urihttp://hdl.handle.net/10919/54347en
dc.language.isoen_USen
dc.publisherVirginia Polytechnic Institute and State Universityen
dc.relation.isformatofOCLC# 20137703en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V856 1989.D686en
dc.subject.lcshVideo display terminalsen
dc.subject.lcshHuman engineeringen
dc.titleThe effects of age, illumination, and anti-glare treatments on visual task performance and perceived image quality with VDTsen
dc.typeDissertationen
dc.type.dcmitypeTexten
thesis.degree.disciplineIndustrial Engineering and Operations Researchen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.leveldoctoralen
thesis.degree.namePh. D.en

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