Notes on the application of the standardized residual sum of squares index for the assessment of intra- and inter-observer variability in color-difference experiments Melgosa Latorre, Manuel García López, Pedro Antonio Gómez Robledo, Luis Shamey, Renzo Hinks, David Cui, Guihua Ronnier Luo, Ming Research Project FIS2010-19839 from the Ministerio de Educación y Ciencia (Spain), with the European Regional Development Fund (ERDF), provided support for this work. The standardized residual sum of squares index was proposed to examine the significant merit of a given color-difference formula over another with respect to a given set of visual color-difference data [J. Opt. Soc. Am. A24, 1823–1829, 2007]. This index can also be employed to determine intra- and inter-observer variability, although the full complexity of this variability cannot be described by just one number. Appropriate utilization of the standardized residual sum of squares index for the assessment of observer variability is described with a view to encourage its use in future color-difference research. The main goal of this paper is to demonstrate that setting the F parameters of the standardized residual sum of squares index to 1 results in a loss of essential properties of the index (for example, symmetry), and is therefore strongly discouraged. 2024-10-29T13:55:51Z 2024-10-29T13:55:51Z 2011-05 journal article Melgosa et al. (2011). Notes on the application of the standardized residual sum of squares index for the assessment of intra-and inter-observer variability in color-difference experiments. J. Opt. Soc. Am. A / Vol. 28, No. 5 / May 2011. DOI:10.1364/JOSAA.28.000949 1084-7529 https://hdl.handle.net/10481/96478 10.1364/JOSAA.28.000949 eng http://creativecommons.org/licenses/by-nc-nd/4.0/ open access Attribution-NonCommercial-NoDerivatives 4.0 Internacional Optica Publishing Group