Psychological Research

, Volume 78, Issue 1, pp 136–140 | Cite as

Subjective criteria and illusions in visual testing: some methodological limitations

Original Article


It is argued that illusions cannot generally be investigated with criterion-independent methods. This limits the value of the data obtained from them. This is particularly important when the results are compared between groups of subjects, for example, between dyslexic readers and controls, since it is possible that the differences between the groups reflect differences with regard to criteria rather than real perceptual differences.


  1. Bradley, A., & Skottun, B. C. (1984). The effects of large orientation and spatial frequency differences on spatial discriminations. Vision Research, 24, 1889–1896.PubMedCrossRefGoogle Scholar
  2. Cestnick, L. (2001). Cross-modality temporal processing deficits in developmental phonological dyslexics. Brain and Cognition, 46, 319–325.PubMedCrossRefGoogle Scholar
  3. Cestnick, L., & Coltheart, M. (1999). The relationship between language-processing and visual-processing deficits in developmental dyslexia. Cognition, 71, 231–255.PubMedCrossRefGoogle Scholar
  4. Davis, C., Castles, A., McAnnaly, K., & Gray, J. (2001). Lapses of concentration and dyslexic performance on the Ternus task. Cognition, 81, B21–B31.PubMedCrossRefGoogle Scholar
  5. Green, D. M., & Swets, J. A. (1974). Signal detection theory and psychophysics. Huntington: Krieger.Google Scholar
  6. Hari, R., & Kiesila, P. (1996). Deficit of temporal auditory processing in dyslexic adults. Neuroscience Letters, 205, 138–140.PubMedCrossRefGoogle Scholar
  7. Harwerth, R. S., & Rawlings, S. C. (1977). Viewing time and stereoscopic threshold with random-dot stereograms. American Journal of Optometry and Physiological Optics, 54, 452–457.PubMedCrossRefGoogle Scholar
  8. Hikosaka, O., Miyauchi, S., Shimojo, S. (1993). Focal visual attention produces illusory temporal order and motion sensation. Vision Research, 33, 1219–1240.PubMedCrossRefGoogle Scholar
  9. Kelly, D. H. (1966). Frequency doubling in visual responses. Journal of the Optical Society of America, 56, 1628–1633.CrossRefGoogle Scholar
  10. Kevan, A., & Pammer, K. (2008a). Making the link between dorsal stream sensitivity and reading. NeuroReport, 19, 467–470.PubMedCrossRefGoogle Scholar
  11. Kevan, A., & Pammer, K. (2008b). Visual deficits in pre-readers at familial risk for dyslexia. Vision Research, 48, 2835–2839.PubMedCrossRefGoogle Scholar
  12. Kevan, A., & Pammer, K. (2009). Predicting early reading skills from pre-reading measures of dorsal stream functioning. Neuropsychologia, 47, 3174–3181.PubMedCrossRefGoogle Scholar
  13. Lallier, M., Thierry, G., Tainturier, M.-J., Donnadieu, S., Peyrin, C., Billard, C., et al. (2009). Auditory and visual stream segregation in children and adults: An assessment of the amodality assumption of the ‘sluggish attentional shifting’ theory of dyslexia. Brain Research, 1302, 132–147.PubMedCrossRefGoogle Scholar
  14. Li, W., Meekins, K., & Schirillo, J. (2012). Magno and parvo stimuli affect illusory directional hearing in normal and dyslexic readers. Neuropsychologia, 50, 2068–2074.PubMedCrossRefGoogle Scholar
  15. Macmillan, N. A., & Creeman, C. D. (1991). Detection theory—a user’s guide. Cambridge: Cambridge University Press.Google Scholar
  16. Mitchell, P., Mottron, L., Soulieres, I., & Ropar, D. (2010). Susceptibility to the Shepard illusion in participants with autism: Reduced top–down influences within perception? Autism Research, 3, 113–119.PubMedCrossRefGoogle Scholar
  17. Pammer, K., Connell, E., & Kevan, A. (2010). Spelling and reading: Using visual sensitivity to explore shared or separate orthographic representations. Perception, 39, 387–406.PubMedCrossRefGoogle Scholar
  18. Pammer, K., & Lovegrove, W. (2001). The influence of color on transient system activity: Implications for dyslexia research. Perception & Psychophysics, 63, 490–500.CrossRefGoogle Scholar
  19. Pammer, K., & Wheatley, C. (2001). Isolating the M(y)-cell response in dyslexia using the spatial frequency doubling illusion. Vision Research, 41, 2139–2147.PubMedCrossRefGoogle Scholar
  20. Sanders, L. L. O., de Millas, W., Heinz, A., Kathmann, N., & Sterzer, P. (2012). Apparent motion perception in patients with paranoid schizophrenia. European Archives of Psychiatry and Clinical Neuroscience,. doi:10.1007/s00406-012-0344-5.PubMedGoogle Scholar
  21. Skottun, B. C. (2001). On the use of the Ternus test to assess magnocellular function. Perception, 30, 1449–1457.PubMedCrossRefGoogle Scholar
  22. Skottun, B. C. (2011). Amplitude spectra of line-motion stimuli. Perception, 40, 656–673.PubMedCrossRefGoogle Scholar
  23. Skottun, B. C., & Skoyles, J. R. (2006). Attention, dyslexia, and the line-motion illusion. Optometry and Vision Science, 83, 843–849.PubMedCrossRefGoogle Scholar
  24. Skottun, B. C., & Skoyles, J. R. (2011). The frequency doubling illusion and testing of magnocellular sensitivity. Neuro-Ophthalmology, 35, 251–254.CrossRefGoogle Scholar
  25. Slaghuis, W. L., & Ryan, J. F. (1999). Spatio-temporal contrast sensitivity, coherent motion, and visible persistence in developmental dyslexia. Vision Research, 39, 651–668.PubMedCrossRefGoogle Scholar
  26. Slaghuis, W. L., Twell, A. J., & Kingston, K. R. (1996). Visual and language processing disorders are concurrent in dyslexia and continue into adulthood. Cortex, 32, 413–438.PubMedCrossRefGoogle Scholar
  27. Steinman, S. B., Steinman, B. A., & Garzia, R. P. (1998). Vision and attention. II: Is visual attention a mechanism through which a deficient magnocellular pathway might cause reading disability? Optometry and Vision Science, 75, 674–681.PubMedCrossRefGoogle Scholar
  28. Swets, J. A., Tanner, W. P., & Birdsall, T. G. (1964). Decision processes in perception. In J. A. Swets (Ed.), Signal detection and recognition by human observers (pp. 3–57). New York: Wiley.Google Scholar
  29. Ternus, J. (1926). Experimentelle Untersuchungen uber phanomenale Identitat. Psychologishe Forschung, 7, 81–135. (English translation: (1938). The problem of phenomenal identity. In: Ellis, W.D., (Ed.), A source book of gestalt psychology (pp. 149–160) London: Routledge Kegan Paul.CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  1. 1.OsloNorway
  2. 2.Centre for Mathematics and Physics in the Life Sciences and Experimental Biology (CoMPLEX)University College LondonLondonUK

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