Attention, Perception, & Psychophysics

, Volume 76, Issue 2, pp 452–459 | Cite as

Weightlifting exercise and the size–weight illusion

  • G. BuckinghamEmail author
  • C. M. Byrne
  • J. Paciocco
  • L. van Eimeren
  • M. A. Goodale


In the size–weight illusion (SWI), large objects feel lighter than equally weighted small objects. In the present study, we investigated whether this powerful weight illusion could influence real-lift behavior—namely, whether individuals would perform more bicep curls with a dumbbell that felt subjectively lighter than with an identically weighted, but heavier-feeling, dumbbell. Participants performed bicep curls until they were unable to continue with both a large, light-feeling 5-lb dumbbell and a smaller, heavy-feeling 5-lb dumbbell. No differences emerged in the amounts of exercise that participants performed with each dumbbell, even though they felt that the large dumbbell was lighter than the small dumbbell. Furthermore, in a second experiment, we found no differences in how subjectively tired participants felt after exercising for a set time with either dumbbell. We did find, however, differences in the lifting dynamics, such that the small dumbbell was moved at a higher average velocity and peak acceleration. These results suggest that the SWI does not appear to influence exercise outcomes, suggesting that perceptual illusions are unlikely to affect one’s ability to persevere with lifting weights.


Perception Action 


Author note

The authors thank J. Ladich for his help with creating the stimuli. G.B. was supported with a Banting Postdoctoral Fellowship, awarded by the Natural Sciences and Engineering Research Council of Canada (NSERC).


  1. Borg, G. (1970). Perceived exertion as an indicator of somatic stress. Scandinavian Journal of Rehabilitation Medicine, 2, 92–98.PubMedGoogle Scholar
  2. Buckingham, G., Cant, J. S., & Goodale, M. A. (2009). Living in a material world: How visual cues to material properties affect the way that we lift objects and perceive their weight. Journal of Neurophysiology, 102, 3111–3118. doi: 10.1152/jn.00515.2009 CrossRefPubMedGoogle Scholar
  3. Buckingham, G., & Goodale, M. A. (2010a). The influence of competing perceptual and motor priors in the context of the size–weight illusion. Experimental Brain Research, 205, 283–288. doi: 10.1007/s00221-010-2353-9 CrossRefPubMedGoogle Scholar
  4. Buckingham, G., & Goodale, M. A. (2010b). Lifting without seeing: The role of vision in perceiving and acting upon the size weight illusion. PLoS ONE, 5, e9709. doi: 10.1371/journal.pone.0009709 PubMedCentralCrossRefPubMedGoogle Scholar
  5. Burgess, P. R., & Jones, L. F. (1997). Perceptions of effort and heaviness during fatigue and during the size–weight illusion. Somatosensory and Motor Research, 14, 189–202.CrossRefPubMedGoogle Scholar
  6. Carey, D. P. (2001). Do action systems resist visual illusions? Trends in Cognitive Sciences, 5, 109–113. doi: 10.1016/S1364-6613(00)01592-8 CrossRefPubMedGoogle Scholar
  7. Charpentier, A. (1891). Analyse expérimentale quelques éléments de la sensation de poids. Archives de Physiologie Normales et Pathologiques, 3, 122–135.Google Scholar
  8. Cousineau, D. (2005). Confidence intervals in within-subject designs: A simpler solution to Loftus and Masson’s method. Tutorials in Quantitative Methods for Psychology, 1, 42–46.Google Scholar
  9. Ellis, R. R., & Lederman, S. J. (1999). The material-weight illusion revisited. Perception & Psychophysics, 61, 1564–1576.CrossRefGoogle Scholar
  10. Flanagan, J. R., & Beltzner, M. A. (2000). Independence of perceptual and sensorimotor predictions in the size–weight illusion. Nature Neuroscience, 3, 737–741. doi: 10.1038/76701 CrossRefPubMedGoogle Scholar
  11. Flanagan, J. R., Bittner, J. P., & Johansson, R. S. (2008). Experience can change distinct size–weight priors engaged in lifting objects and judging their weights. Current Biology, 18, 1742–1747. doi: 10.1016/j.cub.2008.09.042 CrossRefPubMedGoogle Scholar
  12. Flournoy, T. (1894). De l’influence de la perception visuelle des corps sur leur poids apparent. L'Année Psychologique, 1, 198–200.CrossRefGoogle Scholar
  13. Gordon, A. M., Forssberg, H., Johansson, R. S., & Westling, G. (1991). Visual size cues in the programming of manipulative forces during precision grip. Experimental Brain Research, 83, 477–482.PubMedGoogle Scholar
  14. Grandy, M. S., & Westwood, D. A. (2006). Opposite perceptual and sensorimotor responses to a size–weight illusion. Journal of Neurophysiology, 95, 3887–3892. doi: 10.1152/jn.00851.2005 CrossRefPubMedGoogle Scholar
  15. Haffenden, A. M., Schiff, K. C., & Goodale, M. A. (2001). The dissociation between perception and action in the Ebbinghaus illusion: Nonillusory effects of pictorial cues on grasp. Current Biology, 11, 177–181.CrossRefPubMedGoogle Scholar
  16. Mon-Williams, M., & Murray, A. H. (2000). The size of the visual size cue used for programming manipulative forces during precision grip. Experimental Brain Research, 135, 405–410.CrossRefPubMedGoogle Scholar
  17. Plaisier, M. A., & Smeets, J. B. J. (2012). Mass is all that matters in the size–weight illusion. PLoS ONE, 7, e42518. doi: 10.1371/journal.pone.0042518 PubMedCentralCrossRefPubMedGoogle Scholar
  18. Ross, H. E. (1969). When is a weight not illusory? Quarterly Journal of Experimental Psychology, 21, 346–355. doi: 10.1080/14640746908400230 CrossRefPubMedGoogle Scholar
  19. Seashore, C. E. (1899). Some psychological statistics II. The material weight illusion. University of Iowa Studies in Psychology, (2), 36–46.Google Scholar
  20. Witt, J. K., Linkenauger, S. A., & Proffitt, D. R. (2012). Get me out of this slump! Visual illusions improve sports performance. Psychological Science, 23, 397–399. doi: 10.1177/0956797611428810 CrossRefPubMedGoogle Scholar
  21. Wood, G., Vine, S. J., & Wilson, M. R. (2013). The impact of visual illusions on perception, action planning, and motor performance. Attention, Perception, & Psychophysics, 75, 830–834. doi: 10.3758/s13414-013-0489-y CrossRefGoogle Scholar
  22. Woodman, T., & Hardy, L. (2003). The relative impact of cognitive anxiety and self-confidence upon sport performance: A meta-analysis. Journal of Sports Sciences, 21, 443–457. doi: 10.1080/0264041031000101809 CrossRefPubMedGoogle Scholar

Copyright information

© Psychonomic Society, Inc. 2013

Authors and Affiliations

  • G. Buckingham
    • 1
    • 2
    Email author
  • C. M. Byrne
    • 2
  • J. Paciocco
    • 2
  • L. van Eimeren
    • 2
  • M. A. Goodale
    • 2
  1. 1.Department of Psychology, School of Life SciencesHeriot-Watt UniversityEdinburghUK
  2. 2.Brain and Mind Institute, Department of PsychologyUniversity of Western OntarioLondonCanada

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