Force and Timing Variability in Rhythmic Unimanual Tapping

Abstract In 3 experiments the interdependencies between timing and force production in unimanual paced and self-paced rhythmic tapping tasks were examined as participants (N = 6 in each experiment) tapped (a) to 1 of 3 target periods (333 ms, 500 ms, and 1,000 ms), while they simultaneously produced a constant peak force (PF) over a 50-s trial; (b) to produce 1 of 3 target forces (5, 10, and 15 N) at their preferred frequency, while keeping their rhythm as invariant as possible; and (c) to all combinations of target force and period. The results showed that (a) magnitudes of force and period were largely independent; (b) variability in timing increased proportionally with tapping period, and the variability in force increased with peak force; (c) force variability decreased at faster tapping rates; and (d) timing variability decreased with increasing force levels, (e) Analysis of tap-to-tap variability revealed adjustments over sequences of taps and an acceleration in the tapping rate in unpaced conditions. The interdependencies of force and time are discussed with respect to the challenges they provide for an oscillator-based account.

[1]  S. Keele,et al.  Does the Cerebellum Provide a Common Computation for Diverse Tasks? A Timing Hypothesis a , 1990, Annals of the New York Academy of Sciences.

[2]  A. Wing.  28 The Long and Short of Timing in Response Sequences , 1980 .

[3]  Shaffer Lh.  Rhythm and timing in skill. , 1982 .

[4]  L. Shaffer.  Rhythm and timing in skill. , 1982, Psychological review.

[5]  P. Killeen,et al.  Optimal timing and the Weber function. , 1987, Psychological review.

[6]  R. Ivry,et al.  Perception and production of temporal intervals across a range of durations: evidence for a common timing mechanism. , 1995, Journal of experimental psychology. Human perception and performance.

[7]  Dennis L. Hart,et al.  Effect of cooling on force oscillations during maximal voluntary eccentric exercise , 1985, Experimental Neurology.

[8]  M. Turvey,et al.  Coupling dynamics in interlimb coordination. , 1993, Journal of experimental psychology. Human perception and performance.

[9]  D J Glencross,et al.  The effect of temporal and force changes on the patterning of sequential movements , 1993, Psychological research.

[10]  J. M. Cattell,et al.  On the Perception of Small Differences , 1894 .

[11]  David J. Getty,et al.  Discrimination of short temporal intervals: A comparison of two models , 1975 .

[12]  D A Rosenbaum,et al.  Cooperative selection of movements: The optimal selection model , 1996, Psychological research.

[13]  Steven W. Keele,et al.  Modular Analysis of Timing in Motor Skill , 1988 .

[14]  John H. Wearden,et al.  Interval production as an analogue of the peak procedure: Evidence for similarity of human and animal timing processes , 1988 .

[15]  David A. Rosenbaum,et al.  The regulation of contact in rhythmic tapping. , 1998 .

[16]  Is the Cerebellum Involved in Motor and Perceptual Timing: A Case Study. , 1985 .

[17]  A Semjen,et al.  On Controlling Force and Time in Rhythmic Movement Sequences: The Effect of Stress Location , 1984, Annals of the New York Academy of Sciences.

[18]  S. Keele,et al.  Timing Functions of The Cerebellum , 1989, Journal of Cognitive Neuroscience.

[19]  H. Zelaznik,et al.  Motor-output variability: a theory for the accuracy of rapid motor acts. , 1979, Psychological review.

[20]  Andreas Daffertshofer,et al.  Effects of noise on the phase dynamics of nonlinear oscillators , 1998 .

[21]  K. Newell,et al.  On the relationship between peak force and peak force variability in isometric tasks. , 1985, Journal of motor behavior.

[22]  Alfred B. Kristofferson,et al.  Psychophysical theories of duration discrimination , 1974 .

[23]  S W Keele,et al.  Force control and its relation to timing. , 1987, Journal of motor behavior.

[24]  J Tanji,et al.  Firing rate of individual motor units in voluntary contraction of abductor digiti minimi muscle in man. , 1973, Experimental neurology.

[25]  K M Newell,et al.  Impulse variability in isometric tasks. , 1993, Journal of motor behavior.

[26]  G. E. Stelmach,et al.  The Timing Effects of Accent Production in Periodic Finger-Tapping Sequences. , 1996, Journal of motor behavior.

[28]  S. Keele,et al.  Do perception and motor production share common timing mechanisms: a correctional analysis. , 1985, Acta psychologica.

[29]  M. T. Turvey,et al.  ‘Clock’ and ‘motor’ components in absolute coordination of rhythmic movements , 1989, Neuroscience.

[30]  E. Saltzman,et al.  Space-time behavior of single and bimanual rhythmical movements: data and limit cycle model. , 1987 .

[31]  R Ivry,et al.  Cerebellar Involvement in the Explicit Representation of Temporal Information a , 1993, Annals of the New York Academy of Sciences.

[32]  C. Douglas Creelman,et al.  Human Discrimination of Auditory Duration , 1962 .

[33]  John A. Michon,et al.  Timing in temporal tracking , 1967 .

[34]  Robert Sessions Woodworth,et al.  THE ACCURACY OF VOLUNTARY MOVEMENT , 1899 .

[35]  J A Kelso,et al.  Space-time behavior of single and bimanual rhythmical movements: data and limit cycle model. , 1987, Journal of experimental psychology. Human perception and performance.

[36]  W. Hall,et al.  The Time-Sense , 1927 .

[37]  M. Turvey,et al.  Diffusive, Synaptic, and Synergetic Coupling: An Evaluation Through In-Phase and Antiphase Rhythmic Movements. , 1996, Journal of motor behavior.

[38]  K. Newell,et al.  Force variability in isometric responses. , 1988, Journal of experimental psychology. Human perception and performance.

[39]  A. Wing.  Effects of type of movement on the temporal precision of response sequences , 1977 .

[40]  Russell M. Church,et al.  A connectionist model of timing. , 1991 .

[41]  A. Kristofferson,et al.  Response delays and the timing of discrete motor responses , 1973 .

[42]  P R Killeen,et al.  Optimal timing and the Weber function. , 1987, Psychological review.

[43]  John F. Kolen,et al.  Resonance and the Perception of Musical Meter , 1994, Connect. Sci..

[44]  A Semjen,et al.  Planning and timing of finger-tapping sequences with a stressed element. , 1986, Journal of motor behavior.

[45]  Les G. Carlton,et al.  Reaction time and response dynamics , 1987 .

[46]  D Hary,et al.  Temporal tracking and synchronization strategies. , 1985, Human neurobiology.