Abstract
Experiment 1 documents modality effects on the material-weight illusion for a low-mass object set (58.5 g). These modality effects indicate that the material-weight illusion is principally a haptically derived phenomenon: Haptically accessed material cues were both sufficient and necessary for full-strength illusions, whereas visually accessed material cues were only sufficient to generate moderate-strength illusions. In contrast, when a high-mass object set (357 g) was presented under the same modality conditions, no illusions were generated. The mass-dependent characteristic of this illusion is considered to be a consequence of differing grip forces. Experiment 2 demonstrates that the enforcement of a firm grip abolishes the low-mass material-weight illusion. Experiment 3 documents that a firm grip also diminishes perceptual differentiation of actual mass differences. Several possible explanations of the consequences of increasing grip force are considered.
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Bingham, G. P. (1987). Kinematic form and scaling: Further investigations on the visual perception of lifted weights.Journal of Experimental Psychology: Human Perception & Performance,13, 155–177.
Charpentier, A. (1891). Analyse experimentale de quelques elements de la sensation de poids [Experimental study of some aspects of weight perception].Archives de Physiologie Normales et Pathologiques,1.3, 122–135.
Cross, D. V., &Rotkin, L. (1975). The relation between size and apparent heaviness.Perception & Psychophysics,18, 79–87.
Dresslar, F. B. (1894). Studies in the psychology of touch.American Journal of Psychology,6, 313–368.
Ellis, R. R. (1996).Haptic weight illusions with and without vision. Unpublished doctoral dissertation, Queen’s University, Kingston, Ontario, Canada.
Ellis, R. R., &Lederman, S. J. (1993). The role of haptic versus visual volume cues in the size-weight illusion.Perception & Psychophysics,53, 315–324.
Ellis, R. R., &Lederman, S. J. (1998). The golf-ball illusion: Evidence for top-down processing in weight perception.Perception,27, 193–201.
Flanagan, J. R., &Wing, A. M. (1997). Effects of surface texture and grip force on the discrimination of hand-held loads.Perception & Psychophysics,59, 111–118.
Flanagan, J. R., Wing, A. M., Allison, S., &Spencely, A. (1995). Effects of surface texture on weight perception when lifting objects with a precision grip.Perception & Psychophysics,57, 282–290.
Harshfield, S. P., &DeHardt, D. C. (1970). Weight judgment as a function of apparent density of objects.Psychonomic Science,20, 365–366.
Johansson, R. S., &Vallbo, A. B. (1979). Tactile sensibility in the human hand: Relative and absolute densities of four types of mechanoreceptive units in glabrous skin.Journal of Physiology,286, 283–300.
Johnson, K. O., &Hsiao, S. S. (1994). Evaluation of the relative roles of slowly and rapidly adapting afferent fibers in roughness perception.Canadian Journal of Physiology & Pharmacology,72, 488–497.
Katz, D. (1989).The world of touch (L. E. Krueger, Trans.). Hillsdale, NJ: Erlbaum. (Original work published 1925)
Kenshalo, D. R. (1984). Cutaneous temperature sensitivity. In W. W. Dawson & J. M. Enoch (Eds.),Foundations of sensory science (pp. 419–464). Berlin: Springer-Verlag.
Keppel, G. (1982).Design and analysis: A researcher’s handbook (2nd ed.). Englewood Cliffs, NJ: Prentice-Hall.
Lederman, S. J. (1978). “Improving one’s touch” … and more.Perception & Psychophysics,24, 154–160.
Lederman, S. J., &Klatzky, R. L. (1987). Hand movements: A window into haptic object recognition.Cognitive Psychology,19, 343–368.
Lederman, S. J., &Klatzky, R. L. (1997). Haptic aspects of motor control. In F. Boller & J. Graftman (Eds.),Handbook of neuropsychology (Vol. 11, pp. 131–148). Amsterdam: Elsevier.
Loomis, J. M., &Lederman, S. J. (1986). Tactual perception. In K. Boff, L. Kaufman, & J. Thomas (Eds.),Handbook of perception and human performance (chap. 31, pp. 31-1–31-41). New York: Wiley.
Pick, H. L., &Pick, A. D. (1967). A developmental and analytic study of the size-weight illusion.Journal of Experimental Child Psychology,5, 362–371.
Ross, H. E. (1969). When is weight not an illusion?Quarterly Journal of Experimental Psychology,21, 346–355.
Ross, H. E. (1997). On the possible relations between discriminability and apparent magnitude.British Journal of Mathematical & Statistical Psychology,50, 187–203.
Runeson, S., &Frykholm, G. (1981). Visual Perception of Lifted Weight.Journal of Experimental Psychology: Human Perception & Performance,1, 733–740.
Srinivasan, M. A., &Lamotte, R. H. (1994). Tactual discrimination of softness.Journal of Neuroscience,72, 88–100.
Stevens, J. C, &Rubin, L. L. (1970). Psychophysical scales of apparent heaviness and the size-weight illusion.Perception & Psychophysics,8, 225–230.
Stevens, S. S. (1961). To honour Fechner and repeal his law.Science,133, 80–86.
Turvey, M. T., &Carello, C. (1995). Dynamic touch. In W. Epstein & S. Rogers (Eds.),Handbook of perception and cognition (Vol. 5, pp. 401–490). New York: Academic Press.
Vallbo, A. B., &Johansson, R. S. (1984). Properties of cutaneous mechanoreceptors in the human hand related to touch sensation.Human Neurobiology,3, 3–14.
Westling, G., &Johansson, R. S. (1984). Factors influencing the force control during precision grip.Experimental Brain Research,53, 277–284.
Wolfe, H. K. (1898). Some effects of size on judgments of weight.Psychological Review,5, 25–54.
Zwislocki, J. L., &Goodman, D. A. (1980). Absolute scaling magnitudes: A validation.Perception & Psychophysics,28, 28–38.
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This work was supported by an NSERC postgraduate fellowship to R. Ellis and by awards from the following institutions to S. J. Lederman: NSERC, The Institute for Robotics and Intelligent Systems Centre of Excellence of Canada, and The Manufacturing Research Corporation of Ontario Centre of Excellence.
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Ellis, R.R., Lederman, S.J. The material-weight illusion revisited. Perception & Psychophysics 61, 1564–1576 (1999). https://doi.org/10.3758/BF03213118
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DOI: https://doi.org/10.3758/BF03213118