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Strategic adaptation to performance objectives in a dual-task setting.

Christian P Janssen¹, Duncan P Brumby

¹UCL Interaction Centre, University College London.

Cognitive Science

|May 14, 2011

Summary

People strategically shift attention during multitasking, not just at task completion. Drivers flexibly managed attention between dialing and simulated driving to maintain performance, challenging task-switching theories.

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Area of Science:

Cognitive psychology
Human-computer interaction
Traffic safety

Background:

Multitasking involves interleaving attention between tasks.
Current models suggest task switching occurs at subtask completion.
This study investigates attention allocation when subtask-boundary switching is suboptimal.

Purpose of the Study:

To examine how individuals allocate attention when multitasking.
To test if people switch tasks solely at subtask boundaries.
To understand strategic attention control in demanding dual-task scenarios.

Main Methods:

Participants performed a simulated driving task while manually dialing a UK telephone number.
Driving performance (lateral position) and dialing behavior were recorded.
Computational modeling analyzed attention allocation strategies.

Main Results:

Drivers returned attention to steering before completing dialing subtasks.
This strategy was necessary to maintain safe driving performance.
Deviating from subtask boundaries improved overall task performance.

Conclusions:

Attention allocation in multitasking is strategic and goal-directed.
Individuals adapt attentional control to meet performance objectives.
Findings challenge the simple subtask-completion cueing model of task switching.