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Evaluation of an Exclusive Spur Dike U-Turn Design with Radar-Collected Data and Simulation

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The effect of SPAM administration during a dynamic simulation.

Russell S Pierce¹

¹University of California, Riverside, Psychology Department, 900 University Ave., Riverside, CA 92507, USA. Russell.Pierce@email.ucr.edu

|November 20, 2012

Summary

The Situation Present Assessment Method (SPAM) did not affect overall workload but did impact task performance, especially for novice users. Performance decrements may be unique to SPAM probes.

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Area of Science:

Human-Computer Interaction
Cognitive Psychology
Human Factors Engineering

Background:

The Situation Present Assessment Method (SPAM) uses warning signals to differentiate workload from situation awareness (SA) assessments.
Dual-task paradigms, including SPAM, are hypothesized to influence dynamic workload and task performance.
Previous research suggests most dual tasks impact workload and performance.

Purpose of the Study:

To investigate the impact of the Situation Present Assessment Method (SPAM) on workload and task performance.
To determine if SPAM administration influences cognitive load and operational effectiveness.
To assess the validity of SPAM as a workload and SA assessment tool.

Main Methods:

Workload and performance were evaluated using the Air Traffic Scenarios Test.
Three conditions were compared: SPAM probes, non-SPAM probes, and no probes.
Study methodology followed established procedures by Durso, Bleckley, and Dattel.

Main Results:

Global workload remained unaffected by the administration of SPAM probes.
Task performance was significantly affected by SPAM probes, particularly in novice performers.
No significant impact on overall workload was observed across conditions.

Conclusions:

Warning signals in secondary tasks do not eliminate performance decrements.
SPAM administration may introduce unique performance decrements.
Users should consider removing post-probe performance data and optimizing assessment design.