Modelling relative motion to facilitate intra-limb coordination

TitleModelling relative motion to facilitate intra-limb coordination
Publication TypeJournal Article
Year of Publication2005
AuthorsBreslin G, Hodges NJ, Williams AM, CURRAN W, KREMER J
JournalHuman Movement Science
Pagination446 - 463
Date Published06/2005
KeywordsAction observation
AbstractThe importance of relative motion information when modelling a novel motor skill was examined. Participants were assigned to one of four groups. Groups 1 and 2 viewed demonstrations of a skilled cricket bowler presented in either video or point light format. Group 3 observed a single point of light pertaining to the wrist of the skilled bowler only. Participants in Group 4 did not receive a demonstration and acted as controls. During 60 acquisition trials, participants in the demonstration groups viewed a model five times before each 10-trial block. Retention was examined the following day. Intra-limb coordination was assessed for the right elbow relative to the wrist in comparison to the model. The demonstration groups showed greater concordance with the model than the control group. However, the wrist group performed less like the model than the point light and video groups, who did not differ from each other. These effects were maintained in retention. Relative motion information aided the acquisition of intra-limb coordination, while making this information more salient (through point lights) provided no additional benefit. The motion of the model's bowling arm was replicated more closely than the non-bowling arm, suggesting that information from the end-effector is prioritized during observation for later reproduction.
Short TitleHuman Movement Science