Translator Disclaimer
1 October 1990 Methods for evaluating the perceptual quality of VDUs
Author Affiliations +
The quality of VDUs, as experienced by operators of workstations, should be assessable on the basis of methods which have found general approval. Therefore, methods of assessment and their mutual consistency are investigated. This paper contains a comparison of results obtained by five different methods, luminance contrast being the independent variable. Fixation duration and saccade length of the eye movements during search are compared with search velocity and scaled reading comfort. Reaction times for word identification are also measured. Luminance contrast is varied over a range of about two decades, using both positive and negative polarity. A considerable varialion in the variables was found and a high correlation between the subjective and objective parameters was observed. Variations in fixation duration and in reaction times, reflecting changes in processing time, are consistent. The relative effectivity and the ease of execution of the methods will be discussed. Search velocity and scaled comfort seem to be suitable methods.
© (1990) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jacques A. J. Roufs and Martin C. Boschman "Methods for evaluating the perceptual quality of VDUs", Proc. SPIE 1249, Human Vision and Electronic Imaging: Models, Methods, and Applications, (1 October 1990);


Text density, eye movements, and reading
Proceedings of SPIE (September 30 1990)
Oh say, can you see? The physiology of vision
Proceedings of SPIE (May 31 1991)
Assessing visual gray-scale sensitivity on a CRT
Proceedings of SPIE (September 30 1990)

Back to Top