Divided attention in bimanual aiming movements: effects on movement accuracy

Area of Science:

• Motor Control
• Cognitive Psychology
• Human Movement Science

Background:

• Bimanual coordination involves complex motor control.
• Attentional strategies can influence motor performance.
• Understanding how attention allocation affects bimanual tasks is crucial.

Purpose of the Study:

• To investigate the effect of attentional focus on a bimanual aiming task.
• To compare performance when attention is directed to one limb versus both limbs.
• To examine the role of attentional focus in movement parameter selection.

Main Methods:

• Two experiments were conducted with college-aged participants.
• Participants performed quick, bimanual lever reversals in the sagittal plane.
• Attentional strategies were manipulated (focused on one limb vs. free choice).

Main Results:

• Spatial accuracy was superior when attention was focused on a single limb compared to the non-attended limb or both limbs.
• No significant differences in a no-knowledge of results (KR) retention test were observed when attention was directed to both limbs.
• Attentional strategy differences were maintained in a no-KR retention test in Experiment 2, albeit with a smaller effect.

Conclusions:

• Attentional focus on a single limb enhances spatial accuracy in bimanual aiming.
• The movement parameter selection process is positively influenced by focused attention.
• Strategic attentional allocation is key for optimizing bimanual motor performance.