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dc.contributor.advisorYılmazer, Semiha
dc.contributor.authorTaherzadeh, Pardis
dc.date.accessioned2018-05-29T07:44:33Z
dc.date.available2018-05-29T07:44:33Z
dc.date.copyright2018-05
dc.date.issued2018-05
dc.date.submitted2018-05-28
dc.identifier.urihttp://hdl.handle.net/11693/46952
dc.descriptionCataloged from PDF version of article.en_US
dc.descriptionThesis (M.S.): Bilkent University, Department of Interior Architecture and Environmental Design, İhsan Doğramacı Bilkent University, 2018.en_US
dc.descriptionIncludes bibliographical references (leaves 89-93).en_US
dc.description.abstractThis thesis investigates the effects of spectral power distribution (SPD) characteristics of light sources on hue differentiation performance of observers. Color differentiation efficiency of light sources was investigated with respect to their SPD characteristics. Hue attribute of Kürkçü’s (2017) differentiation task was used in this study. Three different groups of students performed the hue differentiation task under 3 different lighting settings; D65, Light Emitting Diode (LED) and Compact Fluorescent Light (CFL) with 4000K and 6500K Correlated Color Temperatures (CCT). The speed and accuracy of performing the hue differentiation task were investigated to indicate the task performance. Ninety students from different departments at Bilkent University and Middle East Technical University voluntarily participated in this study. The participants performed the hue differentiation task inside a light booth as a control light condition. Additionally, the alertness level of the participants as a biological effect of light sources was also investigated in this study. The alertness level of participants was assessed using Karolinska Sleepiness Scale (KSS). The results showed that SPD characteristic of the light sources was effective on hue differentiation performance of observers. Indeed, the hue differentiation performance was in proportion to the radiation intensity of the SPDs of light sources. Overall accuracy and speed of D65 were significantly better in pairwise comparison with LED and CFL due to wide and continuous band SPD characteristic. Moreover, under LED light source the accuracy of Green to Blue (G to B) hue differentiation task was lower in comparison to other hue tasks. However, under CFL the accuracy of Red to Yellow (R to Y) hue differentiation task was lower in comparison to other hue tasks. It was found that alertness level and perceived performance of the participants were not significantly different under different light sources.en_US
dc.description.statementofresponsibilityby Pardis Taherzadeh.en_US
dc.format.extentxii, 103 leaves : illustrations, charts (some color) ; 30 cm.en_US
dc.language.isoEnglishen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectSpectral Power Distribution (SPD)en_US
dc.subjectHue Differentiation Tasken_US
dc.subjectAlertness levelen_US
dc.subjectTask Performanceen_US
dc.titleIvestigating the influence of spectral power distribution characteristics on hue differentiation task performanceen_US
dc.title.alternativeSpektral güç dağıtımı özelliklerinin renk türü ayrımcılık ışı uzerındekı etkinliklerinin araştırılmasıen_US
dc.typeThesisen_US
dc.departmentDepartment of Interior Architecture and Environmental Designen_US
dc.publisherBilkent Universityen_US
dc.description.degreeM.S.en_US
dc.identifier.itemidB158431


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