• About
  • Policies
  • What is openaccess
  • Library
  • Contact
Advanced search
      View Item 
      •   BUIR Home
      • University Library
      • Bilkent Theses
      • Theses - Department of Interior Architecture and Environmental Design
      • Dept.of Interior Architecture and Environmental Design - Master's degree
      • View Item
      •   BUIR Home
      • University Library
      • Bilkent Theses
      • Theses - Department of Interior Architecture and Environmental Design
      • Dept.of Interior Architecture and Environmental Design - Master's degree
      • View Item
      JavaScript is disabled for your browser. Some features of this site may not work without it.

      Ivestigating the influence of spectral power distribution characteristics on hue differentiation task performance

      Thumbnail
      View / Download
      3.0 Mb
      Author
      Taherzadeh, Pardis
      Advisor
      Yılmazer, Semiha
      Date
      2018-05
      Publisher
      Bilkent University
      Language
      English
      Type
      Thesis
      Item Usage Stats
      166
      views
      89
      downloads
      Abstract
      This 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.
      Keywords
      Spectral Power Distribution (SPD)
      Hue Differentiation Task
      Alertness level
      Task Performance
      Permalink
      http://hdl.handle.net/11693/46952
      Collections
      • Dept.of Interior Architecture and Environmental Design - Master's degree 150
      Show full item record

      Browse

      All of BUIRCommunities & CollectionsTitlesAuthorsAdvisorsBy Issue DateKeywordsTypeDepartmentsThis CollectionTitlesAuthorsAdvisorsBy Issue DateKeywordsTypeDepartments

      My Account

      Login

      Statistics

      View Usage StatisticsView Google Analytics Statistics

      Bilkent University

      If you have trouble accessing this page and need to request an alternate format, contact the site administrator. Phone: (312) 290 1771
      Copyright © Bilkent University - Library IT

      Contact Us | Send Feedback | Off-Campus Access | Admin | Privacy