@article{ScheffczykEngbertKrampeetal.1996,
  author    = {Scheffczyk, Christian and Engbert, Ralf and Krampe, Ralf-Thomas and Kurths, J{\"u}rgen and Rosenblum, Michael and Zaikin, Alexei A.},
  title     = {Nonlinear Modelling of Polyrhythmic Hand Movements},
  year      = {1996},
  language  = {en}
}
@article{ScheffczykKrampeEngbertetal.1997,
  author    = {Scheffczyk, Christian and Krampe, Ralf-Thomas and Engbert, Ralf and Rosenblum, Michael and Kurths, J{\"u}rgen and Kliegl, Reinhold},
  title     = {Tempo-induced transitions in polyrhythmic hand movements},
  year      = {1997},
  abstract  = {We investigate the cognitive control in polyrhythmic hand movements as a model paradigm for bimanual coordination. Using a symbolic coding of the recorded time series, we demonstrate the existence of qualitative transitions induced by experimental manipulation of the tempo. A nonlinear model with delayed feedback control is proposed, which accounts for these dynamical transitions in terms of bifurcations resulting from variation of the external control parameter. Furthermore, it is shown that transitions can also be observed due to fluctuations in the timing control level. We conclude that the complexity of coordinated bimanual movements results from interactions between nonlinear control mechanisms with delayed feedback and stochastic timing components.},
  language  = {en}
}
@article{ZaikinRosenblumScheffczyketal.1997,
  author    = {Zaikin, Alexei A. and Rosenblum, Michael and Scheffczyk, Christian and Engbert, Ralf and Krampe, Ralf-Thomas and Kurths, J{\"u}rgen},
  title     = {Modeling qualitative changes in bimanual movements},
  year      = {1997},
  language  = {en}
}
@article{EngbertKrampeKliegl2002,
  author    = {Engbert, Ralf and Krampe, Ralf-Thomas and Kliegl, Reinhold},
  title     = {Synchronizing movements with the metronome : nonlinear error corrections and unstable periodic orbits},
  year      = {2002},
  language  = {en}
}
@article{KrampeEngbertKliegl2002,
  author    = {Krampe, Ralf-Thomas and Engbert, Ralf and Kliegl, Reinhold},
  title     = {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},
  year      = {2002},
  language  = {en}
}
@article{EngbertScheffczykKrampeetal.2002,
  author    = {Engbert, Ralf and Scheffczyk, Christian and Krampe, Ralf-Thomas and Kurths, J{\"u}rgen and Kliegl, Reinhold},
  title     = {Symbolic dynamics of bimanual production of polyrhythms},
  isbn      = {3-540- 63481-9},
  year      = {2002},
  abstract  = {We analyse time series from a study on bimanual rhythmic movements in which the speed of performance (the external control parameter) was experimentally manipulated. Using symbolic transformations as a visualization technique we observe qualitative changes in the dynamics of the timing patterns. Such phase transitions are quantitatively described by measures of complexity. Using these results we develop an advanced symbolic coding which enables us to detect important dynamical structures. Furthermore, our analysis raises new questions concerning the modelling of the underlying human cognitive-motor system.},
  language  = {en}
}
@article{KrampeKlieglMayretal.2000,
  author    = {Krampe, Ralf-Thomas and Kliegl, Reinhold and Mayr, Ulrich and Engbert, Ralf and Vorberg, D.},
  title     = {The fast and the slow of skilled bimanual rhythm production : parallel versus integrated timing},
  year      = {2000},
  language  = {en}
}
@unpublished{EngbertScheffczykKrampeetal.1997,
  author    = {Engbert, Ralf and Scheffczyk, Christian and Krampe, Ralf-Thomas and Rosenblum, Mikhael and Kurths, J{\"u}rgen and Kliegl, Reinhold},
  title     = {Tempo-induced transitions in polyrhythmic hand movements},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-14380},
  year      = {1997},
  abstract  = {We investigate the cognitive control in polyrhythmic hand movements as a model paradigm for bimanual coordination. Using a symbolic coding of the recorded time series, we demonstrate the existence of qualitative transitions induced by experimental manipulation of the tempo. A nonlinear model with delayed feedback control is proposed, which accounts for these dynamical transitions in terms of bifurcations resulting from variation of the external control parameter. Furthermore, it is shown that transitions can also be observed due to fluctuations in the timing control level. We conclude that the complexity of coordinated bimanual movements results from interactions between nonlinear control mechanisms with delayed feedback and stochastic timing components.},
  language  = {en}
}
@unpublished{GuastiEngbertKrampeetal.2000,
  author    = {Guasti, Giovanna and Engbert, Ralf and Krampe, Ralf T. and Kurths, J{\"u}rgen},
  title     = {Phase transitions, complexity, and stationarity in the production of polyrhythms},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-14933},
  year      = {2000},
  abstract  = {Contents: 1 Introduction 2 Experiment 3 Data 4 Symbolic dynamics 4.1 Symbolic dynamics as a tool for data analysis 4.2 2-symbols coding 4.3 3-symbols coding 5 Measures of complexity 5.1 Word statistics 5.2 Shannon entropy 6 Testing for stationarity 6.1 Stationarity 6.2 Time series of cycle durations 6.3 Chi-square test 7 Control parameters in the production of rhythms 8 Analysis of relative phases 9 Discussion 10 Outlook},
  language  = {en}
}
@article{SchiekScheffczykEngbertetal.1997,
  author    = {Schiek, Michael and Scheffczyk, Christian and Engbert, Ralf and Kurths, J{\"u}rgen and Krampe, Ralf-Thomas and Kliegl, Reinhold and Drepper, Friedhelm R.},
  title     = {Symbolic dynamics of physiological synchronisation : examples from bimanual movements and cardiorespiratory interaction},
  year      = {1997},
  abstract  = {Key words: Nonlinear time series analysis, symbolic dynamics, phase transitions, physiological data, biological synchronization, production of polyrhythms, cardiorespiratory interaction, variation of control parameter},
  language  = {en}
}
@article{KrampeEngbertKliegletal.2000,
  author    = {Krampe, Ralf-Thomas and Engbert, Ralf and Kliegl, Reinhold and Kurths, J{\"u}rgen},
  title     = {Koordination und Synchronisation der H{\"a}nde beim rhythmischen Timing},
  year      = {2000},
  language  = {de}
}
@article{KrampeEngbertKliegl2002,
  author    = {Krampe, Ralf-Thomas and Engbert, Ralf and Kliegl, Reinhold},
  title     = {The effects of expertise and age on rhythm production : adaptations to timing and sequencing constraints},
  year      = {2002},
  language  = {en}
}
@article{KrampeEngbertKliegl2001,
  author    = {Krampe, Ralf-Thomas and Engbert, Ralf and Kliegl, Reinhold},
  title     = {Age-specific problems in rhythmic timing},
  year      = {2001},
  language  = {en}
}
@article{ScheffczykEngbertKurthsetal.1995,
  author    = {Scheffczyk, Christian and Engbert, Ralf and Kurths, J{\"u}rgen and Krampe, Ralf-Thomas and Kliegl, Reinhold},
  title     = {Nonlinear Phenomena in Polyrhythmic Hand Movements},
  isbn      = {981-02-2689-6},
  year      = {1995},
  abstract  = {In this paper we apply symbolic transformations as a visualisation technique for analysing rhythm production. It is shown that qualitative information can be extracted from the experimental data. This approach may provide new insights into the organisation of temporal order by the brain on different levels of description. A simple phenomenological model for the explanation of the observed phenomena is proposed.},
  language  = {en}
}
@article{MayrKlieglKrampe2005,
  author    = {Mayr, Ulrich and Kliegl, Reinhold and Krampe, Ralf-Thomas},
  title     = {Timing, sequencing and executive control in repetitive movement production},
  issn      = {0096-1523},
  year      = {2005},
  abstract  = {The authors demonstrate that the timing and sequencing of target durations require low-level timing and executive control. Sixteen young (M-age = 19 years) and 16 older (M-age = 70 years) adults participated in 2 experiments. In Experiment 1, individual mean-variance functions for low-level timing (isochronous tapping) and the sequencing of multiple targets (rhythm production) revealed (a) a dissociation of low-level timing and sequencing in both age groups, (b) negligible age differences for low-level timing, and (c) large age differences for sequencing. Experiment 2 supported the distinction between low-level timing and executive functions: Selection against a dominant rhythm and switching between rhythms impaired performances in both age groups and induced pronounced perseveration of the dominant pattern in older adults.},
  language  = {en}
}
@article{KlieglKrampeMayr2003,
  author    = {Kliegl, Reinhold and Krampe, Ralf-Thomas and Mayr, Ulrich},
  title     = {Formal models of age differences in task complexity effects},
  year      = {2003},
  language  = {en}
}
@article{KlieglMayrKrampe1995,
  author    = {Kliegl, Reinhold and Mayr, Ulrich and Krampe, Ralf-Thomas},
  title     = {Process dissociations in cognitive aging},
  year      = {1995},
  language  = {en}
}
@article{KrampeEricsson1995,
  author    = {Krampe, Ralf-Thomas and Ericsson, Anders K.},
  title     = {Deliberate practice and elite musical performance},
  year      = {1995},
  language  = {en}
}
@article{KlieglMayrKrampe1993,
  author    = {Kliegl, Reinhold and Mayr, Ulrich and Krampe, Ralf T.},
  title     = {Psychophysikalische Bestimmung von kognitiven Darbietungenszeit-Leistungs-Funktionen},
  year      = {1993},
  language  = {de}
}
@article{KrampeSchwarzWitt1996,
  author    = {Krampe, Ralf-Thomas and Schwarz, Udo and Witt, Annette},
  title     = {Measures of complexity in signal analysis},
  year      = {1996},
  language  = {en}
}
@article{MayrKlieglKrampe1996,
  author    = {Mayr, Ulrich and Kliegl, Reinhold and Krampe, Ralf-Thomas},
  title     = {Sequential and coordinative processing dynamics in figural transformations across the life span},
  year      = {1996},
  language  = {en}
}
@article{KrampeEricsson1996,
  author    = {Krampe, Ralf-Thomas and Ericsson, Anders K.},
  title     = {Mainting excellence : deliberate practice and elite performance in young and old pianists},
  year      = {1996},
  language  = {en}
}
@article{KlieglMayrKrampe1994,
  author    = {Kliegl, Reinhold and Mayr, Ulrich and Krampe, Ralf-Thomas},
  title     = {Time-accuracy functions for the determination of person and process differences : an application to cognitive aging},
  year      = {1994},
  language  = {en}
}
@article{KrampeMayrCharness1996,
  author    = {Krampe, Ralf-Thomas and Mayr, Ulrich and Charness, N.},
  title     = {The role of practice and coaching in entrepreneurial skill domains : an international comparison of life-span chess skill acquisition},
  year      = {1996},
  language  = {en}
}
@article{KlieglMayrKrampe1998,
  author    = {Kliegl, Reinhold and Mayr, Ulrich and Krampe, Ralf-Thomas},
  title     = {Prozessdissoziationen in der kognitiven Altersforschung},
  isbn      = {3-8017-0761-X},
  year      = {1998},
  language  = {de}
}
@book{Krampe1994,
  author    = {Krampe, Ralf-Thomas},
  title     = {Maintaining excellence : cognitive-motor performance in pianists differing in age and skill level},
  publisher = {Ed. Sigma},
  address   = {Berlin},
  year      = {1994},
  language  = {en}
}
@misc{KlieglPhilippLuckneretal.2001,
  author    = {Kliegl, Reinhold and Philipp, Doris and Luckner, Matthias and Krampe, Ralf T.},
  title     = {Face Memory Skill Acquisition},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-57067},
  year      = {2001},
  language  = {en}
}
@misc{KlieglSmithLindenbergeretal.1993,
  author    = {Kliegl, Reinhold and Smith, Jacqui and Lindenberger, Ulman and Mayr, Ulrich and Krampe, Ralf and Baltes, Paul B.},
  title     = {Max-Planck-Institut f{\"u}r Bildungsforschung Berlin},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-41124},
  year      = {1993},
  language  = {de}
}
@misc{KlieglMayrKrampe1994,
  author    = {Kliegl, Reinhold and Mayr, Ulrich and Krampe, Ralf},
  title     = {Time-accuracy functions for determining process and person differences : an application to cognitive aging},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-17101},
  year      = {1994},
  abstract  = {A paradigm for the determination of time-accuracy functions (TAFs) for individual participants is introduced for two pairs of tasks differing in cognitive complexity, that is, word scanning vs cued recognition and figural scanning vs figural reasoning. TAFs can be used to test dissociations of cognitive processes beyond scale-related ambiguities of ordinal interactions. The approach is applied to examine the cognitive-aging hypothesis that a single slowing factor can account for interactions between adult age and cognitive task complexity. Twenty young and 20 old adults participated in 17 sessions. Presentation times required for 75, 87.5, and 100\% accuracies were determined for each task with a variant of the psychophysical method of limits. Accuracy was fit by negatively accelerated functions of presentation time. State-trace analyses showed that different slowing factors are required for high- and low-complexity tasks. Relations to speed-accuracy and performance-resource functions are discussed.},
  language  = {en}
}