The greatest support for this model has been the finding that several experimental variables, such as frequency of feedback and practice conditions, differentially affect the accuracy of the underlying GMP and the assigned temporal and parameters (Heuer, Schmidt, & Ghodsian, 1995; Wulf, Lee, & Schmidt, 1994; Wulf, Schmidt, & Deubel, 1993).
Answer: Schmidt et al. (1979) suggested that time constraints affect temporal parameterization in that larger neuromuscular forces are required to produce movement amplitudes in short versus longer movement times. Also immaturity in the neuromuscular system or the central pathways regulating visuomotor integration would be expected to result in greater performance variability (Motor Control).
3. Wulf, G., Schmidt, R. A., & Deubel, H. (1993). Reduced feedback frequency enhances generalized motor program learning but not parameterization learning. Journal of Experimental Psychology: Learning, Memory, and Cognition, 19(5), 1134-1150.
4. Motor Control in Children and Adults during a Non-Speech Oral Task. http://www.asha.org/NR/rdonlyres/7B1B6246-9009-46A5-A66D-F48956B5D3ED/0/11448_1.pdf. Accessed 22 October 2008.
5. Schmidt, R. A., Zelaznik, H., Hawkins, B., Frank, J. S., & Quinn, J. T. (1979). Motor- output variability: A theory for the accuracy of rapid motor acts. Psychological Review, 86,