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To know or not to know: adaptations to expected and unexpected visual occlusions in interceptive actions

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Abstract
This study examined how explicit advance knowledge might influence adaptive behavior to visual occlusions. Catching performance and kinematics of good ball catchers were compared between no, early and late visual occlusion trials. In an unexpected condition, discrete visual occlusions of 400 ms appeared randomly interspersed between no occlusion trials, whereas in an expected condition the presence and type of occlusion was announced a priori. Expectation of occlusion resulted in an adapted limb transport and grasp phase affected by explicit advance knowledge, whereas in the unexpected condition an earlier movement onset (worst-case scenario) was followed by situation-specific on-line corrections. The observed differences cannot be explained by trial-by-trial adaptations, but establish the influence of explicit advance knowledge in the motor response of interceptive actions.
Keywords
Adaptations, Visual occlusion, Kinematics, Explicit advance knowledge, Interceptive actions

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Chicago
Tijtgat, Pieter, Simon J Bennett, Geert JP Savelsbergh, Dirk De Clercq, and Matthieu Lenoir. 2011. “To Know or Not to Know: Adaptations to Expected and Unexpected Visual Occlusions in Interceptive Actions.” In Studies in Perception and Action XI, ed. Eric P Charles and L James Smart, 99–104. London, UK: Psychology Press.
APA
Tijtgat, P., Bennett, S. J., Savelsbergh, G. J., De Clercq, D., & Lenoir, M. (2011). To know or not to know: adaptations to expected and unexpected visual occlusions in interceptive actions. In E. P. Charles & L. J. Smart (Eds.), Studies in perception and action XI (pp. 99–104). Presented at the 16th International conference on Perception and Action (ICPA 2011), London, UK: Psychology Press.
Vancouver
1.
Tijtgat P, Bennett SJ, Savelsbergh GJ, De Clercq D, Lenoir M. To know or not to know: adaptations to expected and unexpected visual occlusions in interceptive actions. In: Charles EP, Smart LJ, editors. Studies in perception and action XI. London, UK: Psychology Press; 2011. p. 99–104.
MLA
Tijtgat, Pieter, Simon J Bennett, Geert JP Savelsbergh, et al. “To Know or Not to Know: Adaptations to Expected and Unexpected Visual Occlusions in Interceptive Actions.” Studies in Perception and Action XI. Ed. Eric P Charles & L James Smart. London, UK: Psychology Press, 2011. 99–104. Print.
@inproceedings{1860294,
  abstract     = {This study examined how explicit advance knowledge might influence adaptive behavior to visual occlusions. Catching performance and kinematics of good ball catchers were compared between no, early and late visual occlusion trials. In an unexpected condition, discrete visual occlusions of 400 ms appeared randomly interspersed between no occlusion trials, whereas in an expected condition the presence and type of occlusion was announced a priori. Expectation of occlusion resulted in an adapted limb transport and grasp phase affected by explicit advance knowledge, whereas in the unexpected condition an earlier movement onset (worst-case scenario) was followed by situation-specific on-line corrections. The observed differences cannot be explained by trial-by-trial adaptations, but establish the influence of explicit advance knowledge in the motor response of interceptive actions.},
  author       = {Tijtgat, Pieter and Bennett, Simon J and Savelsbergh, Geert JP and De Clercq, Dirk and Lenoir, Matthieu},
  booktitle    = {Studies in perception and action XI},
  editor       = {Charles, Eric P and Smart, L James},
  isbn         = {9781848729766},
  keyword      = {Adaptations,Visual occlusion,Kinematics,Explicit advance knowledge,Interceptive actions},
  language     = {eng},
  location     = {Ouro Preto, Brazil},
  pages        = {99--104},
  publisher    = {Psychology Press},
  title        = {To know or not to know: adaptations to expected and unexpected visual occlusions in interceptive actions},
  year         = {2011},
}