Fixation positions after skipping saccades: A single space makes a large difference
During reading, saccadic eye movements are generated to shift words into the center of the visual field for lexical processing. Recently, Krügel and Engbert (Vision Research 50:1532–1539, 2010) demonstrated that within-word fixation positions are largely shifted to the left after skipped words. However, explanations of the origin of this effect cannot be drawn from normal reading data alone. Here we show that the large effect of skipped words on the distribution of within-word fixation positions is primarily based on rather subtle differences in the low-level visual information acquired before saccades. Using arrangements of “x” letter strings, we reproduced the effect of skipped character strings in a highly controlled single-saccade task. Our results demonstrate that the effect of skipped words in reading is the signature of a general visuomotor phenomenon. Moreover, our findings extend beyond the scope of the widely accepted range-error model, which posits that within-word fixation positions in reading depend solely on the distances of target words. We expect that our results will provide critical boundary conditions for the development of visuomotor models of saccade planning during reading.
- Brysbaert, M., Drieghe, D., & Vitu, F. (2005). Word skipping: Implications for theories of eye movement control in reading. In G. Underwood (Ed.), Cognitive processes in eye guidance (pp. 53–78). Oxford, U.K.: Oxford University Press. CrossRef
- DenBuurman, R., Boersma, T., & Gerrissen, J. F. (1981). Eye movements and the perceptual span in reading. Reading Research Quarterly, 16, 227–235. CrossRef
- Deubel, H., Wolf, W., & Hauske, G. (1984). The evaluation of the oculomotor error signal. In A. G. Gale & F. Johnson (Eds.), Theoretical and applied aspects of eye movement research (pp. 55–62). Amsterdam, The Netherlands: Elsevier Science.
- Drieghe, D., Desmet, T., & Brysbaert, M. (2007). How important are linguistic factors in word skipping during reading? British Journal of Psychology, 98, 157–171. CrossRef
- Engbert, R., & Krügel, A. (2010). Readers use Bayesian estimation for eye movement control. Psychological Science, 21, 366–371. doi:10.1177/0956797610362060 CrossRef
- Engbert, R., & Nuthmann, A. (2008). Self-consistent estimation of mislocated fixations during reading. PLoS One, 3, e1534. doi:10.1371/journal.pone.0001534 CrossRef
- Engbert, R., Nuthmann, A., Richter, E. M., & Kliegl, R. (2005). SWIFT: A dynamical model of saccade generation during reading. Psychological Review, 112, 777–813. doi:10.1037/0033-295X.112.4.777 CrossRef
- Findlay, J. M. (1982). Global visual processing for saccadic eye movements. Vision Research, 22, 1033–1045. CrossRef
- Kapoula, Z. (1985). Evidence for a range effect in the saccadic system. Vision Research, 25, 1155–1157. CrossRef
- Krügel, A., & Engbert, R. (2010). On the launch-site effect for skipped words during reading. Vision Research, 50, 1532–1539. doi:10.1016/j.visres.2010.05.009 CrossRef
- McConkie, G. W., Kerr, P. W., Reddix, M. D., & Zola, D. (1988). Eye movement control during reading: I. The location of initial eye fixations on words. Vision Research, 28, 1107–1118. CrossRef
- McConkie, G. W., & Rayner, K. (1975). The span of the effective stimulus during a fixation in reading. Perception & Psychophysics, 17, 578–586. doi:10.3758/BF03203972 CrossRef
- Nuthmann, A., Engbert, R., & Kliegl, R. (2005). Mislocated fixations during reading and the inverted optimal viewing position effect. Vision Research, 45, 2201–2217. CrossRef
- O’Regan, J. K. (1981). The “convenient viewing position” hypothesis. In D. F. Fisher, R. A. Monty, & J. W. Senders (Eds.), Eye movements: Cognition and visual perception (pp. 289–298). Hillsdale, NJ: Erlbaum.
- O’Regan, J. K., & Lévy-Schoen, A. (1987). Eye movement strategy and tactics in word recognition and reading. In M. Coltheart (Ed.), Attention and performance XII: The psychology of reading (pp. 363–383). Hillsdale, NJ: Erlbaum.
- Radach, R. (1996). Blickbewegungen beim Lesen: Psychologische Aspekte der Determination von Fixationspositionen [Eye movements in reading: Psychological aspects of the determination of fixation positions]. Münster, Germany: Waxmann.
- Radach, R., & Kempe, V. (1993). An individual analysis of initial fixation positions in reading. In G. d’ Ydewalle & J. Van Rensbergen (Eds.), Perception and cognition: Advances in eye movement research (pp. 213–226). Amsterdam, The Netherlands: North-Holland.
- Radach, R., & McConkie, G. W. (1998). Determinants of fixations positions in words during reading. In G. Underwood (Ed.), Eye guidance in reading and scene perception (pp. 77–100). Amsterdam, The Netherlands: Elsevier. CrossRef
- Rayner, K. (1986). Eye movements and the perceptual span in beginning and skilled readers. Journal of Experimental Child Psychology, 41, 211–236. CrossRef
- Rayner, K. (1998). Eye movements in reading and information processing: 20 years of research. Psychological Bulletin, 124, 372–422. doi:10.1037/0033-2909.124.3.372 CrossRef
- Rayner, K., & McConkie, G. W. (1976). What guides a reader’s eye movements? Vision Research, 16, 829–837. CrossRef
- Rayner, K., Sereno, S. C., & Raney, G. E. (1996). Eye movement control in reading: A comparison of two types of models. Journal of Experimental Psychology. Human Perception and Performance, 22, 1188–1200. CrossRef
- Rayner, K., Slattery, T. J., Drieghe, D., & Liversedge, S. P. (2011). Eye movements and word skipping during reading: Effects of word length and predictability. Journal of Experimental Psychology. Human Perception and Performance, 37, 514–528. doi:10.1037/a0020990 CrossRef
- Rayner, K., & Well, A. D. (1996). Effects of contextual constraint on eye movements in reading: A further examination. Psychonomic Bulletin & Review, 3, 504–509. doi:10.3758/BF03214555 CrossRef
- Reichle, E. D., Rayner, K., & Pollatsek, A. (1999). Eye movement control in reading: Accounting for initial fixation locations and refixations within the E-Z Reader model. Vision Research, 39, 4403–4411. CrossRef
- Reilly, R. G., & O’Regan, J. K. (1998). Eye movement control during reading: A simulation of some word-targeting strategies. Vision Research, 38, 303–317. doi:10.1016/S0042-6989(97)87710-3 CrossRef
- Vitu, F. (2008). About the global effect and the critical role of retinal eccentricity: Implications for eye movements in reading. Journal of Eye Movement Research, 2, 1–18.
- Vitu, F., O’Regan, J. K., Inhoff, A. W., & Topolski, R. (1995). Mindless reading: Eye-movement characteristics are similar in scanning letter strings and reading texts. Perception & Psychophysics, 57, 352–364. CrossRef
- Vitu, F., O’Regan, J. K., & Mittau, M. (1990). Optimal landing position in reading isolated words and continuous text. Perception & Psychophysics, 47, 583–600. CrossRef
- Fixation positions after skipping saccades: A single space makes a large difference
Attention, Perception, & Psychophysics
Volume 74, Issue 8 , pp 1556-1561
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- 1. Department Psychologie, Universität Potsdam, Karl-Liebknecht-Str. 24/25, 14476, Potsdam, OT Golm, Germany
- 2. Laboratoire de Psychologie Cognitive, CNRS, Aix-Marseille Université, Centre St Charles, 3 Place Victor Hugo, 13331, Marseille, France