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Skill Acquisition in Sport
Transcript of Skill Acquisition in Sport
Faculty of Kinesiology
University of New Brunswick Dynamical Systems in Human Movement Analysis Control: the magnitude of a variable related to the limb or limb segment movement (e.g. force, acceleration all kinetics, kinematics) Skill: The ability to modify control and coordination to achieve a desired outcome Coordination: The relationship between movements of limb segments
same limb (intra-limb coordination)
between two different limbs or limb segments (inter-limb) Summers, J. J. (1999). Skill acquisition: current perspectives and future directions. In , In Lidor, R. and Bar-Eli, M. (ed.), Sport psychology: linking theory and practice, Morgantown, W.Va., Fitness Information Technology, c1999, p.83-107 United States Handford, C., Davids, K., Bennett, S., & Button, C. (1997). Skill acquisition in sport: Some applications of an evolving practice ecology. Journal Of Sports Sciences, 15(6), 621-640 References Dynamical Systems Theory (DST) Newell, K. M., & Corcos, D. M. (1993). Issues in variability and motor control. In , In, Newell, K.M. and Corcos, D.M. (eds.), Variability and motor control, Champaign, Ill., Human Kinetics Publishers, c1993, p. 1-12 United State Kelso's bimanual experiment
independent variables are pattern of movement, frequency oscillation DST number of biomechanical degrees of freedom can be reduced by form coordinate structures at a critical frequency, leave previous pattern (180deg) and adopt another one (0deg) Summary Anson, G., Elliott, D., & Davids, K. (2005). Information Processing and Constraints-based Views of Skill Acquisition: Divergent or Complementary?. Motor Control, 9(3), 217 simultaneous and oscillatory movements dependent variable is relative phase: difference in fingers phase values from a common start frequency increased with metronome over trial at a critical frequency, antiphase pattern switched to inphase in phase pattern maintained with increasing frequency motor skill acquisition theories currently has 2 main: information processing and constraints driven
information processing: brain as a computer analogy, Fitts three stage model
constraints driven: self-organizaing systems, DST
at present, no direct relation with research in motor control and physical education
different aspects of both approaches could be used in practice QUESTIONS/DISCUSSION ? Glazier, P. S., & Davids, K. (2009). Constraints on the Complete Optimization of Human Motion. Sports Medicine, 39(1), 15-28. control parameter (CP): external variable can be varied (e.g, frequency of oscillation) order parameter (OP): dependent on the CP (e.g, relative phase) Find a function of OP that works then modulate the CP RP=0deg and RP=180deg are attractor states Southard, D. (1998). Mass and velocity: Control parameters for throwing patterns. Research Quarterly for Exercise and Sport, 69(4), 355-67 Introduction