Embodied cognition in multitasking: increased hand-specific task shielding when stimuli are presented near the hand

Area of Science:

• Cognitive Psychology
• Human-Computer Interaction
• Neuroscience

Background:

• Visual attention is preferentially allocated to stimuli near the hands.
• This proximity effect influences how we process visual information and interact with our environment.

Purpose of the Study:

• To investigate how stimulus-hand proximity affects between-task interference in a dual-task paradigm.
• To determine if proximity enhances or hinders the processing of multiple visual stimuli assigned to specific response hands.

Main Methods:

• A dual-task study was conducted with two experiments.
• Stimuli for Task 1 (S1) and Task 2 (S2) were presented, assigned to response hands (R1, R2) positioned proximally (monitor) or distally (lap).
• Between-task interference was measured to assess the impact of stimulus-hand proximity.

Main Results:

• Stimulus-hand proximity significantly reduced between-task interference compared to distal conditions.
• A further reduction in interference was observed when only one hand was positioned proximally.
• Results contradict the idea of a general attentional benefit for multiple stimuli within hand space.

Conclusions:

• Stimulus-hand proximity provides a hand-specific processing benefit, promoting more separate processing of concurrent tasks.
• This proximity effect critically influences the quality of multiple task performance.
• Findings have implications for both basic cognitive research and applied fields like interface design.