Skip to main content

Measures of Consciousness and the Method of Qualitative Differences

  • Chapter
  • First Online:
Consciousness as a Scientific Concept

Part of the book series: Studies in Brain and Mind ((SIBM,volume 5))

  • 1344 Accesses

Abstract

Given the problems associated with a range of subjective measures of consciousness, objective measures are considered here. Again, they are argued to be dubious measures of consciousness. Of most interest however are methodological proposals of how to identify an unproblematic measure of consciousness. These include searching for qualitative differences in task performance, and the related strategy of process dissociation, which relies on associating consciousness with control. While these methods were proposed as ways to get around the debates surrounding subjective and objective measures of consciousness, it is argued that they fail to do so. The suggestion of matching objective and subjective measures of consciousness to phenomenal and access consciousness are also rejected. This points to a significant methodological problem in identifying measures of consciousness, developed further in the next chapter.

This chapter contains parts of ‘Signal detection theory, the exclusion failure paradigm and weak consciousness—Evidence for the access/phenomenal distinction?’ from Consciousness and Cognition, Vol. 18, E. Irvine, pp. 551–560, Copyright 2009. Reprinted with permission from Elsevier.

This is a preview of subscription content, log in via an institution to check access.

Access this chapter

Chapter
USD 29.95
Price excludes VAT (USA)
  • Available as PDF
  • Read on any device
  • Instant download
  • Own it forever
eBook
USD 84.99
Price excludes VAT (USA)
  • Available as EPUB and PDF
  • Read on any device
  • Instant download
  • Own it forever
Softcover Book
USD 109.99
Price excludes VAT (USA)
  • Compact, lightweight edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info
Hardcover Book
USD 109.99
Price excludes VAT (USA)
  • Durable hardcover edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info

Tax calculation will be finalised at checkout

Purchases are for personal use only

Institutional subscriptions

References

  • Azzopardi, P., & Cowey, A. (1997). Is blindsight like normal, near-threshold vision? Proceedings of the National Academy of Sciences USA, 94, 14190–14194.

    Article  Google Scholar 

  • Azzopardi, P., & Cowey, A. (1998). Blindsight and visual awareness. Consciousness and Cognition, 7, 292–311.

    Article  Google Scholar 

  • Bengson, J. J., & Hutchison, K. A. (2007). Variability in response criteria affects estimates of conscious identification and unconscious semantic priming. Consciousness and Cognition, 16, 785–796.

    Article  Google Scholar 

  • Blackwell, H. R. (1952). Studies of psychophysical methods for measuring visual thresholds. Journal of the Optical Society of America, 42, 606–616.

    Article  Google Scholar 

  • Block, N. (1990). Consciousness and accessibility. Behavioral and Brain Sciences, 13, 596–598.

    Article  Google Scholar 

  • Block, N. (2005). Two neural correlates of consciousness. Trends in Cognitive Science, 9, 46–52.

    Article  Google Scholar 

  • Block, N. (2007). Consciousness, accessibility, and the mesh between psychology and neuroscience. Behavioral and Brain Sciences, 30, 481–548.

    Google Scholar 

  • Dehaene, S., Changeux, J. P., Naccache, L., Sackur, J., & Sergent, C. (2006). Conscious, preconscious, and subliminal processing: A testable taxonomy. Trends in Cognitive Sciences, 100, 204–211.

    Article  Google Scholar 

  • Eriksen, C. W. (1960). Discrimination and learning without awareness: A methodological survey and evaluation. Psychological Review, 67, 279–300.

    Article  Google Scholar 

  • Fisk, G. D., & Haase, S. J. (2006). Exclusion failure does not demonstrate unconscious perception II: Evidence from a forced-choice exclusion task. Vision Research, 46, 4244–4251.

    Article  Google Scholar 

  • Galvin, S. J., Podd, J. V., Drga, V., & Whitmore, J. (2003). Type 2 tasks in the theory of signal detectability: Discrimination between correct and incorrect decisions. Psychonomic Bulletin and Review, 10, 843–876.

    Article  Google Scholar 

  • Goldiamond, I. (1958). Indicators of perception: 1. Subliminal perception, subception, unconscious perception: An analysis in terms of psychophysical indicator methodology. Psychological Bulletin, 55, 373–411.

    Article  Google Scholar 

  • Green, D. M., & Swets, J. A. (1966). Signal detection theory and psychophysics. New York: Wiley.

    Google Scholar 

  • Holender, D. (1986). Semantic activation without conscious identification in dichotic listening, parafoveal vision, and visual masking: A survey and appraisal. Behavioral and Brain Sciences, 9, 1–23.

    Article  Google Scholar 

  • Irvine, E. (2009). Signal detection theory, the exclusion failure paradigm and weak consciousness—Evidence for the access/phenomenal distinction? Consciousness and Cognition, 18, 551–560.

    Article  Google Scholar 

  • Jacoby, L. L. (1991). A process dissociation framework: Separating automatic from intentional uses of memory. Journal of Memory and Language, 30, 513–541.

    Article  Google Scholar 

  • Kouider, S., & Dehaene, S. (2007). Levels of processing during non-conscious perception: A critical review of visual masking. Philosophical transactions of the Royal Society B, 362, 857–875.

    Article  Google Scholar 

  • Kunimoto, C., Miller, J., & Pashler, H. (2001). Confidence and accuracy of near-threshold discrimination responses. Consciousness and Cognition, 10, 294–340.

    Article  Google Scholar 

  • Lau, H. C. (2008). A higher order Bayesian decision theory of consciousness. In R. Banerjee & B. K Chakrabati (Eds.), Progress in Brain Research, 168, 35–48.

    Article  Google Scholar 

  • Merikle, P. M., & Daneman, M. (1998). Psychological investigations of unconscious perception. Journal of Consciousness Studies, 5, 5–18.

    Google Scholar 

  • Merikle, P. M., Smilek, D., & Eastwood, J. D. (2001). Perception without awareness: Perspectives from cognitive psychology. Cognition, 79, 115–134.

    Article  Google Scholar 

  • Reingold, E. M. (2004). Unconscious perception and the classic dissociation paradigm: A new angle? Perception & Psychophysics, 66, 882–887.

    Article  Google Scholar 

  • Reingold, E. M., & Merikle, P. M. (1988). Using direct and indirect measure to study perception without awareness. Perception and Psychophysics, 44, 563–575.

    Article  Google Scholar 

  • Reingold, E. M., & Merikle, P. M. (1990). On the inter-relatedness of theory and measurement in the study of unconscious processes. Mind and Language, 5, 9–28.

    Article  Google Scholar 

  • Snodgrass, J. M. (2002). Disambiguating conscious and unconscious influences: Do exclusion paradigms demonstrate unconscious perception? The American Journal of Psychology, 115, 545–579.

    Article  Google Scholar 

  • Snodgrass, J. M. (2004). The dissociation paradigm and its discontents: How can unconscious perception or memory be inferred? Consciousness and Cognition, 13, 107–116.

    Article  Google Scholar 

  • Snodgrass, J. M., & Shevrin, H. (2006). Unconscious inhibition and facilitation at the objective detection threshold: Replicable and qualitatively different unconscious perceptual effects. Cognition, 101, 43–79.

    Article  Google Scholar 

  • Snodgrass, J. M., Bernat, E., & Shevrin, H. (2004). Unconscious perception: A model-based approach to method and evidence. Perception and Psychophysics, 66, 846–867.

    Article  Google Scholar 

  • Swets, J. A. (1996). Signal detection theory and ROC analysis in psychology and diagnostics: Collected papers. Mahwah: Erlbaum Associates.

    Google Scholar 

  • Visser, T. A. W., & Merikle, P. M. (1999). Conscious and unconscious processes: The effects of motivation. Consciousness and Cognition, 8, 94–113.

    Article  Google Scholar 

  • Weiskrantz, L. (1986). Blindsight: A case study and implications. Oxford: Oxford University Press.

    Google Scholar 

  • Weiskrantz, L. (1998). Consciousness and commentaries. International Journal of Psychology, 33, 227–233.

    Article  Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Elizabeth Irvine .

Rights and permissions

Reprints and permissions

Copyright information

© 2013 Springer Science+Business Media Dordrecht

About this chapter

Cite this chapter

Irvine, E. (2013). Measures of Consciousness and the Method of Qualitative Differences. In: Consciousness as a Scientific Concept. Studies in Brain and Mind, vol 5. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-5173-6_3

Download citation

Publish with us

Policies and ethics