Quantifying the Subjective Brightness of Retroreflective Material Using Magnitude Estimations

Justin S Graving; Alicia A Tyrrell; Stacy A Balk

doi:10.17077/drivingassessment.1346

Conference Proceeding

Quantifying the Subjective Brightness of Retroreflective Material Using Magnitude Estimations

Authors: Justin S Graving (University of Minnesota, Minneapolis) , Alicia A Tyrrell (Clemson University, Clemson, SC) , Stacy A Balk (Clemson University, Clemson, SC)

Abstract

Ten small patches of retroreflective material were evaluated using a method of magnitude estimation to quantify the effect of changing the coefficient of retroreflection (RA) on brightness perception. Seventeen undergraduates participated. The results show that brightness is tightly linked with RA. Brightness was influenced more by changes in lower RA than changes in higher RA and follows Steven’s power law for brightness. Practical and theoretical implications are discussed

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How to Cite: Graving, J. , Tyrrell, A. & Balk, S. (2009) “Quantifying the Subjective Brightness of Retroreflective Material Using Magnitude Estimations”, Driving Assessment Conference. 5(2009). doi: https://doi.org/10.17077/drivingassessment.1346