Perceptual Psychophysics

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4 Citations (Scopus)


© 2016 Wiley-VCH Verlag GmbH & Co. KGaA. All rights reserved. This chapter presents an overview of the most basic concepts necessary to both conduct and interpret psychophysical laboratory experiments. On a practical level, psychophysics experimentation is not to be taken lightly. Psychophysics engages problems by measuring the performance of observers in predetermined sensory tasks. Psychophysical results can be directly related to the output of computational models, since models predict observers' performance given a stimulus signal. Although the methods described here are designed to measure discrimination responses to small stimulus changes, it is possible to extend them to construct psychophysical scales relating large changes in the physical stimulus to their corresponding psychological responses. Paired comparison scales are preferred when the psychological sensation to quantify does not have any evident correspondence with a measurable physical attribute. Ground truth databases are perhaps the single most conspicuous manifestation of the influence of psychophysical approaches and methods in computer science.
Original languageEnglish
Title of host publicationBiologically inspired Computer Vision: Fundamentals and Applications
Number of pages27
Publication statusPublished - 5 Oct 2015


  • Classic psychophysics
  • Perceptual psychophysics
  • Psychophysical scaling methods
  • Psychophysical threshold measurement
  • Signal detection theory


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