R Engbert

Summary

Affiliation: University of Potsdam
Country: Germany

Publications

  1. ncbi request reprint Microsaccades: A microcosm for research on oculomotor control, attention, and visual perception
    Ralf Engbert
    Computational Neuroscience, Department of Psychology, University of Potsdam, PO Box 601553, 14415 Potsdam, Germany
    Prog Brain Res 154:177-92. 2006
  2. ncbi request reprint SWIFT: a dynamical model of saccade generation during reading
    Ralf Engbert
    Department of Psychology, University of Potsdam, Potsdam, Germany
    Psychol Rev 112:777-813. 2005
  3. ncbi request reprint Mathematical models of eye movements in reading: a possible role for autonomous saccades
    R Engbert
    Institut fur Psychologie, Universitat Potsdam, Germany
    Biol Cybern 85:77-87. 2001
  4. ncbi request reprint Microsaccades keep the eyes' balance during fixation
    Ralf Engbert
    Department of Psychology, University of Potsdam, PO Box 601553, 14415 Potsdam, Germany
    Psychol Sci 15:431-6. 2004
  5. ncbi request reprint Synchronizing movements with the metronome: nonlinear error correction and unstable periodic orbits
    Ralf Engbert
    Department of Physics, University of Potsdam, Germany
    Brain Cogn 48:107-16. 2002
  6. ncbi request reprint Microsaccades uncover the orientation of covert attention
    Ralf Engbert
    Department of Psychology, University of Potsdam, P O Box 601553, 14415, Potsdam, Germany
    Vision Res 43:1035-45. 2003
  7. ncbi request reprint The fast and the slow of skilled bimanual rhythm production: parallel versus integrated timing
    R T Krampe
    Department of Psychology, University of Potsdam, Germany
    J Exp Psychol Hum Percept Perform 26:206-33. 2000
  8. ncbi request reprint Age-specific problems in rhythmic timing
    R T Krampe
    Department of Psychology, University of Potsdam, Germany
    Psychol Aging 16:12-30. 2001
  9. ncbi request reprint Modeling the control of fixational eye movements with neurophysiological delays
    Konstantin Mergenthaler
    Helmholtz Center for Mind and Brain Dynamics, University of Potsdam, Potsdam, Germany
    Phys Rev Lett 98:138104. 2007
  10. ncbi request reprint Flick-induced flips in perception
    Ralf Engbert
    Department of Psychology, University of Potsdam, 14415 Potsdam, Germany
    Neuron 49:168-70. 2006

Detail Information

Publications26

  1. ncbi request reprint Microsaccades: A microcosm for research on oculomotor control, attention, and visual perception
    Ralf Engbert
    Computational Neuroscience, Department of Psychology, University of Potsdam, PO Box 601553, 14415 Potsdam, Germany
    Prog Brain Res 154:177-92. 2006
    ..We conclude that the investigation of microsaccades will evolve into a new research field contributing to many facets of oculomotor control, visual perception, and the allocation of attention...
  2. ncbi request reprint SWIFT: a dynamical model of saccade generation during reading
    Ralf Engbert
    Department of Psychology, University of Potsdam, Potsdam, Germany
    Psychol Rev 112:777-813. 2005
    ..They also present a mathematical analysis of the dynamics of the SWIFT model. Finally, within this framework, they present an analysis of the transition from parallel to serial processing...
  3. ncbi request reprint Mathematical models of eye movements in reading: a possible role for autonomous saccades
    R Engbert
    Institut fur Psychologie, Universitat Potsdam, Germany
    Biol Cybern 85:77-87. 2001
    ..Our model lends support to the existence of autonomous saccades, i.e., the hypothesis that initiations of saccades are not completely determined by lexical access processes...
  4. ncbi request reprint Microsaccades keep the eyes' balance during fixation
    Ralf Engbert
    Department of Psychology, University of Potsdam, PO Box 601553, 14415 Potsdam, Germany
    Psychol Sci 15:431-6. 2004
    ..On a long time scale, microsaccades reduced fixation errors and binocular disparity (relative to pure drift movements). Thus, our findings clarify the role of oculomotor processes during fixation...
  5. ncbi request reprint Synchronizing movements with the metronome: nonlinear error correction and unstable periodic orbits
    Ralf Engbert
    Department of Physics, University of Potsdam, Germany
    Brain Cogn 48:107-16. 2002
    ..We find that our experimental data are in good agreement with numerical simulations of our theoretical model. These results suggest that feedback control of the human motor systems shows nonlinear behavior...
  6. ncbi request reprint Microsaccades uncover the orientation of covert attention
    Ralf Engbert
    Department of Psychology, University of Potsdam, P O Box 601553, 14415, Potsdam, Germany
    Vision Res 43:1035-45. 2003
    ..Furthermore, our results suggest that microsaccades can be used to map the orientation of visual attention in psychophysical experiments...
  7. ncbi request reprint The fast and the slow of skilled bimanual rhythm production: parallel versus integrated timing
    R T Krampe
    Department of Psychology, University of Potsdam, Germany
    J Exp Psychol Hum Percept Perform 26:206-33. 2000
    ..In alternative to a model based on a single central clock, findings support a model of flexible control structures with multiple timekeepers that can work in parallel to accommodate specific task constraints...
  8. ncbi request reprint Age-specific problems in rhythmic timing
    R T Krampe
    Department of Psychology, University of Potsdam, Germany
    Psychol Aging 16:12-30. 2001
    ..Vorberg & A. M. Wing, 1996). Age stability was found at the level of motor implementation, but there were age-related deficits for processes related to target-duration specification...
  9. ncbi request reprint Modeling the control of fixational eye movements with neurophysiological delays
    Konstantin Mergenthaler
    Helmholtz Center for Mind and Brain Dynamics, University of Potsdam, Potsdam, Germany
    Phys Rev Lett 98:138104. 2007
    ..Differences between horizontal and vertical components of eye movements are found which can be explained neurophysiologically. Finally, we compare our numerical results with analytic approximations...
  10. ncbi request reprint Flick-induced flips in perception
    Ralf Engbert
    Department of Psychology, University of Potsdam, 14415 Potsdam, Germany
    Neuron 49:168-70. 2006
    ..Their study provides new insight into the functional connectivity between oculomotor function and visual perception...
  11. ncbi request reprint Tracking the mind during reading: the influence of past, present, and future words on fixation durations
    Reinhold Kliegl
    University of Potsdam, PO Box 60 15 53, 14451 Potsdam, Germany
    J Exp Psychol Gen 135:12-35. 2006
    ..Most of the time the mind processes several words in parallel at different perceptual and cognitive levels. Eye movements can help to unravel these processes...
  12. pmc Microsaccades are triggered by low retinal image slip
    Ralf Engbert
    Department of Psychology and Helmholtz Center for Mind and Brain Dynamics, University of Potsdam, P O Box 60 15 53, 14415 Potsdam, Germany
    Proc Natl Acad Sci U S A 103:7192-7. 2006
    ..As a result of the dynamic triggering mechanism, individual microsaccade rate can be predicted by the fractal dimension of trajectories. Finally, we propose a minimal computational model for the dynamic triggering of microsaccades...
  13. ncbi request reprint SWIFT explorations of age differences in eye movements during reading
    Jochen Laubrock
    Department of Psychology, University of Potsdam, P O Box 601553, 14415 Potsdam, Germany
    Neurosci Biobehav Rev 30:872-84. 2006
    ..Preliminary simulations of age differences recovered most, but not all experimental effects. Age differences in parameter estimates point towards an important role of visual acuity for oculomotor as well as lexical processing...
  14. ncbi request reprint The IOVP effect in mindless reading: experiment and modeling
    Antje Nuthmann
    Department of Psychology, University of Potsdam, Am Neuen Palais 10, 14469 Potsdam, Germany
    Vision Res 47:990-1002. 2007
    ..We conclude that oculomotor errors, which often induce mislocalized fixations, represent the most important source of the IOVP effect...
  15. ncbi request reprint Oculomotor control in a sequential search task
    Hans A Trukenbrod
    Department of Psychology, University of Potsdam, Am Neuen Palais 10, 14469 Potsdam, Germany
    Vision Res 47:2426-43. 2007
    ..Our results demonstrate that the fixation position is an important predictor of the subsequent saccade by influencing both fixation duration and the selection of the next saccade target...
  16. ncbi request reprint Microsaccades are an index of covert attention: commentary on Horowitz, Fine, Fencsik, Yurgenson, and Wolfe (2007)
    Jochen Laubrock
    Institut fur Psychologie, University of Potsdam, Karl Liebknecht Strasse 24 25, DE 14476 Potsdam, Germany
    Psychol Sci 18:364-6; discussion 367-8. 2007
  17. ncbi request reprint Crossmodal coupling of oculomotor control and spatial attention in vision and audition
    Martin Rolfs
    Department of Psychology, University of Potsdam, PO Box 601553, 14415, Potsdam, Germany
    Exp Brain Res 166:427-39. 2005
    ..We argue that microsaccades can be used to study crossmodal integration of sensory information and to map the time course of saccade preparation during covert shifts of visual and auditory attention...
  18. ncbi request reprint A dynamical model of saccade generation in reading based on spatially distributed lexical processing
    Ralf Engbert
    Department of Psychology, University of Potsdam, P O Box 601553, 14415 Potsdam, Germany
    Vision Res 42:621-36. 2002
    ..The model inherently produces complex eye movement patterns including refixations and regressions due to its underlying dynamical principles...
  19. ncbi request reprint Microsaccade orientation supports attentional enhancement opposite a peripheral cue: commentary on Tse, Sheinberg, and Logothetis (2003)
    Martin Rolfs
    Department of Psychology, University of Potsdam, 14415 Potsdam, Germany
    Psychol Sci 15:705-7; author reply 708-10. 2004
  20. ncbi request reprint Microsaccade dynamics during covert attention
    Jochen Laubrock
    Department of Psychology, University of Potsdam, P O Box 601553, 14415 Potsdam, Germany
    Vision Res 45:721-30. 2005
    ..e., early automatic triggering of saccade programs), followed by a shift in the opposite direction (i.e, controlled inhibition of cue-directed saccades, leading to a 'leakage' of microsaccades in the opposite direction)...
  21. ncbi request reprint Scaling of horizontal and vertical fixational eye movements
    Jin Rong Liang
    Minerva Center and Department of Physics, Bar Ilan University, Ramat Gan, Israel
    Phys Rev E Stat Nonlin Soft Matter Phys 71:031909. 2005
    ..This difference may be due to the need for continuously moving the eyes in the horizontal plane, in order to match the stereoscopic image for different viewing distances...
  22. ncbi request reprint Mislocated fixations during reading and the inverted optimal viewing position effect
    Antje Nuthmann
    Department of Psychology, University of Potsdam, P O Box 601553, 14415 Potsdam, Germany
    Vision Res 45:2201-17. 2005
    ..Thus, the IOVP effect could emerge as a result of a coupling between cognitive and oculomotor processes...
  23. ncbi request reprint Fixation durations before word skipping in reading
    Reinhold Kliegl
    Department of Psychology, University of Potsdam, Potsdam, Germany
    Psychon Bull Rev 12:132-8. 2005
    ..Reasons for inconsistencies in past research and implications for computational models are discussed...
  24. pmc Self-consistent estimation of mislocated fixations during reading
    Ralf Engbert
    Department of Psychology, University of Potsdam, Potsdam, Germany
    PLoS ONE 3:e1534. 2008
    ..We found that the average fraction of mislocated fixations ranges from about 10% to more than 30% depending on word length. These results show that fixation probabilities are strongly affected by oculomotor errors...
  25. ncbi request reprint Phase-synchronization decay of fixational eye movements
    Shay Moshel
    Department of Physics, Bar Ilan University, Raman Gan, Israel
    Ann N Y Acad Sci 1039:484-8. 2005
    ..We found that only two components were synchronized: the right and left horizontal with each other and the right and left vertical. Furthermore, the vertical-vertical components were much more synchronized than the horizontal...
  26. ncbi request reprint Representational models and nonlinear dynamics: irreconcilable approaches to human movement timing and coordination or two sides of the same coin? Introduction to the special issue on movement timing and coordination. Introduction
    Ralf Th Krampe
    University of Potsdam, Germany
    Brain Cogn 48:1-6. 2002