Cognitive Workload Measurement
EyeTracking’s patented Index of Cognitive Activity measures Cognitive Workload objectively and unobtrusively in real-time. This metric has been validated in peer-reviewed research in a number of different fields. It is available through the EyeWorks Cognitive Workload Module or our Workload RT™ stand-alone product. The background and applications of this metric are discussed below.
The pupil is surrounded by two sets of muscles, a circular set and a radial set. The circular muscles react to the presence or absence of light; the radial muscles react when a person exerts mental effort. The Index of Cognitive Activity (ICA) measures pupil changes resulting from mental effort (radial muscles) while factoring out the light reflex (circular muscles). This patented metric is the culmination of three decades of research into cognition and assessment. It was developed under DoD support through projects with the Office of Naval Research.
Interested in learning more about the science behind cognitive workload and out technology? Learn more
Measure the level of difficulty experienced completing a task
Diagnose specific features of a task that are associated with high workload
Identify opportunities to improve ease of system operation
Compare workload across multiple iterations of an interface
Optimize training materials based on a quantifiable measure of difficulty
Demonstrate workload differences between user groups
U.S. Naval Officers
FAA Air Traffic Controllers
TSA Baggage Screeners
Case Study: Northrop Grumman
EyeTracking’s cognitive workload assessment metric is available in two formats:
The Cognitive Workload Module
Workload RT is a simple stand-alone product for researchers and developers who wish to use ICA-based cognitive workload assessment without EyeWorks. Using Workload RT, workload data may be rendered in real time, saved to text file or integrated directly into an external application. Workload RT is an ideal solution for OEM developers or third party developers looking to enhance their own software with our world leading workload measurement technology.
Here follows a non-exhaustive list of publications related to the Index of Cognitive Activity. Please contact us if you wish to have additional publications added to this list.
Using objective robotic automated performance metrics and task-evoked pupillary response to distinguish surgeon expertise
Nguyen, J., Chen, J., Marshall, S. P., Ghodoussipour, S., Chen, A., Gill, I. S., and Hung, A. J.
Evaluation of the Index of Cognitive Activity (ICA) as an Instrument to Measure Cognitive Workload Under Differing Light Conditions
Rerhaye L., Blaser T., Alexander T.
In: Bagnara S., Tartaglia R., Albolino S., Alexander T., Fujita Y. (eds) Proceedings of the 20th Congress of the International Ergonomics Association (IEA 2018). IEA 2018. Advances in Intelligent Systems and Computing, vol 827. Springer, Cham DOI: 10.1007/978-3-319-96059-3_38
Pupillary Response to Cognitive Demand in Parkinson’s Disease: A Pilot Study
Kahya, M., Moon, S., Lyons, K. E., Pahwa, R., Akinwuntan, A. E., & Devos, H.
Increased Postural Demand Is Associated With Greater Cognitive Workload in Healthy Young Adults: A Pupillometry Study
Kahya M, Wood TA, Sosnoff JJ, Devos H.