title: Sequential aiming with one and two limbs: effects of target size.
abstract: It is well reported that movement times to the first target in a two-target sequence are slower than when a single target response is required. This one-target advantage has been shown to emerge when the two-target sequence is performed with the same limb and when the first and second segments within the sequence are performed with different limbs (i.e., when there is a switch between limbs at the first target). The present study examined the functional dependency between response segments in both single and two limb sequential aiming by varying the accuracy demands at the first and second target. Results revealed that, for both one and two limb conditions, the one-target advantage was present with large first targets but not with small first targets. Additionally, when the first target was large and the second target was small, spatial variability at the first target was significantly less (or constrained more) in both one and two limb conditions compared to conditions requiring only a single target response. These findings suggest that similar principles underlie the one-target advantage in both single and two limb sequential movements.
authors: School of Sport, Health and Exercise Sciences, Bangor University, United Kingdom.
authors: Thomas M
authors: TM
authors: Mottram
authors: Faculty of Human Kinetics, University of Windsor, Canada.
authors: Michael A
authors: MA
authors: Khan
authors: School of Sport, Health and Exercise Sciences, Bangor University, United Kingdom. Electronic address: g.p.lawrence@bangor.ac.uk.
authors: G P
authors: GP
authors: Lawrence
authors: Department of Movement Sciences, Maastricht University, The Netherlands.
authors: Jos J
authors: JJ
authors: Adam
authors: School of Kinesiology, Western University, Canada.
authors: Eric
authors: E
authors: Buckolz
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D009068:Movement / Q000502:physiology*; D011597:Psychomotor Performance / Q000502:physiology*; D011930:Reaction Time / Q000502:physiology; D014796:Visual Perception / Q000502:physiology*; D055815:Young Adult
keywords: Movement integration; One-target advantage; Sequential aiming