A neuroergonomic approach to evaluating mental workload in hypermedia interactions

Neuroergonomics could provide on-line methods for measuring mental effort while the operator interacts with hypermedia. We present an experimental study in which 28 participants interacted with a modified version of an existing Spanish e-commerce website in two searching tasks (Goal oriented shoppin...

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Bibliographic Details
Published in:International journal of industrial ergonomics 2011-05, Vol.41 (3), p.298-304
Main Authors: Di Stasi, Leandro L., Antolí, Adoración, Gea, Miguel, Cañas, José J.
Format: Article
Language:English
Subjects:
Cognition & reasoning
E-commerce
Electronic commerce
Ergonomics
Events-interface
Eye movements
Hypermedia
Hypertext
Main sequence
Neurosciences
Pupil
Saccadic peak velocity
Usability
WWW
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Summary:Neuroergonomics could provide on-line methods for measuring mental effort while the operator interacts with hypermedia. We present an experimental study in which 28 participants interacted with a modified version of an existing Spanish e-commerce website in two searching tasks (Goal oriented shopping and Experiential shopping) that demand different amounts of cognitive resources. Mental workload was evaluated multidimensionally, using subjective rating, an interaction index, and eye-related indices. Eye movements and pupil diameter were recorded. The results showed visual scanning behaviour coincided with subjective test scores and performance data in showing a higher information processing load in Goal oriented shopping. However, pupil diameter was able to detect only the variation in user activation during the interaction task, a finding that replicates previous results on the validity of pupil size as an index of arousal. We conclude that a neuroergonomics approach could be a useful method for detecting variations in operators’ attentional states. These results could provide important information for the development of a new attentional screening tool for the prevention of accidents in several application domains. ► Two searching strategies (Goal Oriented vs. Experiential shopping) have been implemented. ► User interaction was evaluated multidimensionally. ► Data converged in showing a higher information processing load for Goal Oriented strategy.
ISSN:0169-8141
1872-8219
DOI:10.1016/j.ergon.2011.02.008