Simple auditory and visual interruptions of a continuous visual tracking task: modality effects and time course of...

Area of Science:

• Human-Computer Interaction
• Cognitive Psychology
• Applied Psychology

Background:

• Conflicting research exists on whether visual or auditory alerts disrupt ongoing tasks more.
• Previous studies often used complex or unique tasks and alerts.
• Understanding simple alert modality effects on visual task performance is crucial for practical applications.

Purpose of the Study:

• To investigate how the modality of simple alerts (visual icons vs. auditory tones) affects performance in an ongoing visual task.
• To compare the disruptive effects of visual versus auditory alerts on tracking and reaction time tasks.
• To evaluate the impact of alert modality on dual-task workload.

Main Methods:

• Participants (n=62) performed a visual tracking task concurrently with a choice reaction time task in response to alerts.
• Alerts were presented as either visual icons or auditory tones.
• Performance on the tracking task and subjective workload (using a scale like NASA-TLX) were measured.

Main Results:

• Visual alerts significantly impaired performance on the ongoing visual tracking task compared to auditory alerts.
• Dual-task workload was lowest with auditory alerts, especially in quiet conditions.
• The disruptive effects of interruptions on tracking performance persisted for approximately 1500 milliseconds.

Conclusions:

• Auditory alerts are less disruptive than visual alerts for simple, ongoing visual tasks.
• Auditory alerts can reduce perceived workload, particularly in non-noisy environments.
• Findings support the Multiple Resources Theory and suggest auditory alerts are preferable for minimizing disruption in applied settings.