@article{EngbertMergenthaler2005,
  author    = {Engbert, Ralf and Mergenthaler, Konstantin},
  title     = {Statistics of fixational eye movements and oculomotor control},
  issn      = {0301-0066},
  year      = {2005},
  language  = {en}
}
@misc{EngbertNuthmannRichteretal.2005,
  author    = {Engbert, Ralf and Nuthmann, Antje and Richter, Eike M. and Kliegl, Reinhold},
  title     = {SWIFT: A Dynamical Model of Saccade Generation during Reading},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-57145},
  year      = {2005},
  abstract  = {Mathematical models have become an important tool for understanding the control of eye movements during reading. Main goals of the development of the SWIFT model (Engbert, Longtin, \& Kliegl, 2002)were to investigate the possibility of spatially distributed processing and to implement a general mechanism for all types of eye movements we observe in reading experiments. Here, we present an advanced version of SWIFT which integrates properties of the oculomotor system and effects of word recognition to explain many of the experimental phenomena faced in reading research. We propose new procedures for the estimation of model parameters and for the test of the model's performance. A mathematical analysis of the dynamics of the SWIFT model is presented. Finally, within this framework, we present an analysis of the transition from parallel to serial processing.},
  language  = {en}
}
@article{EngbertNuthmannRichteretal.2005,
  author    = {Engbert, Ralf and Nuthmann, Antje and Richter, Eike M. and Kliegl, Reinhold},
  title     = {SWIFT : A dynamical model of saccade generation during reading},
  issn      = {0033-295X},
  year      = {2005},
  abstract  = {Mathematical, models,have become an important tool for understanding the control of eye movements during reading. Main goals of the development of the SWIFT model (R. Engbert, A. Longtin, \& R. Kliegl, 2002) were to investigate the possibility of spatially distributed processing and to implement a general mechanism for all types of eye movements observed in reading experiments. The authors present an advanced version of SWIFT that integrates properties of the oculomotor system and effects of word recognition to explain many of the experimental phenomena faced in reading research. They propose new procedures for the estimation of model parameters and for the test of the model's performance. 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},
  language  = {en}
}
@article{KlieglEngbert2005,
  author    = {Kliegl, Reinhold and Engbert, Ralf},
  title     = {Fixation durations before word skipping in reading},
  issn      = {1069-9384},
  year      = {2005},
  abstract  = {We resolve a controversy about reading fixations before word-skipping saccades which were reported as longer or shorter than control fixations in earlier studies. Our statistics are based on resampling of matched sets of fixations before skipped and nonskipped words, drawn from a database of 121,321 single fixations contributed by 230 readers of the Potsdam sentence corpus. Matched fixations originated from single-fixation forward-reading patterns and were equated for their positions within words. Fixations before skipped words were shorter before short or high-frequency words and longer before long or low-frequency words in comparison with control fixations. Reasons for inconsistencies in past research and implications for computational models are discussed},
  language  = {en}
}
@article{LaubrockEngbertKliegl2005,
  author    = {Laubrock, Jochen and Engbert, Ralf and Kliegl, Reinhold},
  title     = {Microsaccade dynamics during covert attention},
  issn      = {0042-6989},
  year      = {2005},
  abstract  = {We compared effects of covert spatial-attention shifts induced with exogenous or endogenous cues on microsaccade rate and direction. Separate and dissociated effects were obtained in rate and direction measures. Display changes caused microsaccade rate inhibition, followed by sustained rate enhancement. Effects on microsaccade direction were differentially tied to cue class (exogenous vs. endogenous) and type (neutral vs. directional). For endogenous cues, direction effects were weak and occurred late. Exogenous cues caused a fast direction bias towards the cue (i.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). (C) 2004 Elsevier Ltd. All rights reserved},
  language  = {en}
}
@article{LaubrockEngbertKliegl2005,
  author    = {Laubrock, Jochen and Engbert, Ralf and Kliegl, Reinhold},
  title     = {Microsaccade rate during (un)ambiguous apparent motion},
  issn      = {0301-0066},
  year      = {2005},
  language  = {en}
}
@article{LiangMoshelZivotofskyetal.2005,
  author    = {Liang, Jin-Rong and Moshel, Shay and Zivotofsky, Ari Z. and Caspi, Avi and Engbert, Ralf and Kliegl, Reinhold and Havlin, Shlomo},
  title     = {Scaling of horizontal and vertical fixational eye movements},
  issn      = {1063-651X},
  year      = {2005},
  abstract  = {Eye movements during fixation of a stationary target prevent the adaptation of the visual system to continuous illumination and inhibit fading of the image. These random, involuntary, small movements are restricted at long time scales so as to keep the target at the center of the field of view. Here we use detrended fluctuation analysis in order to study the properties of fixational eye movements at different time scales. Results show different scaling behavior between horizontal and vertical movements. When the small ballistic movements, i.e., microsaccades, are removed, the scaling exponents in both planes become similar. Our findings suggest that microsaccades enhance the persistence at short time scales mostly in the horizontal component and much less in the vertical component. 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},
  language  = {en}
}
@article{MoshelLiangCaspietal.2005,
  author    = {Moshel, Shay and Liang, Jin-Rong and Caspi, Avi and Engbert, Ralf and Kliegl, Reinhold and Havlin, Shlomo and Zivotofsky, Ari Z.},
  title     = {Phase-synchronization decay of fixational eye movements},
  year      = {2005},
  language  = {en}
}
@article{NuthmannEngbertKliegl2005,
  author    = {Nuthmann, Antje and Engbert, Ralf and Kliegl, Reinhold},
  title     = {Mislocated fixations during reading and the inverted optimal viewing position effect},
  year      = {2005},
  abstract  = {Refixation probability during reading is lowest near the word center, suggestive of an optimal viewing position (OVP). Counter-intuitively, fixation durations are largest at the OVP, a result called the inverted optimal viewing position (IOVP) effect [Vitu, McConkie, Kerr, \& O'Regan, (2001). Vision Research 41, 3513-3533]. Current models of eye-movement control in reading fail to reproduce the IOVP effect. We propose a simple mechanism for generating this effect based on error-correction of mislocated fixations due to saccadic errors, First, we propose an algorithm for estimating proportions of mislocated fixations from experimental data yielding a higher probability for mislocated fixations near word boundaries. Second, we assume that mislocated fixations trigger an immediate start of a new saccade program causing a decrease of associated durations. Thus, the IOVP effect could emerge as a result of a coupling between cognitive and oculomotor processes. (c) 2005 Elsevier Ltd. All rights reserved},
  language  = {en}
}
@article{RichterEngbert2005,
  author    = {Richter, Eike M. and Engbert, Ralf},
  title     = {Impossible gap paradigm : Experimental evidence for autonomous saccade timing},
  issn      = {0301-0066},
  year      = {2005},
  language  = {en}
}