Using the Distribution of Eye Fixations to Assess Pilots' Mental Workload

Abstract

Based on previous research showing the usefulness of spatial statistics in detecting randomness in the distribution of eye fixations, this study investigated the ocular behavior of professional pilots engaged in a simulated flight. The distribution of eye fixations is here used an index of mental workload. Eye movements were recorded during the different phases (departure to landing) of a simulated flight, and were analyzed using spatial statistics algorithms. Results showed sensitivity of spatial dispersion indices to variations in mental workload: higher during departure and landing, lower during the other phases. This result provides additional evidence of the utility of fixations distribution as a real-time measure of mental workload and, consequently, as a trigger for adaptive automation.

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References

Clark

P.J.

Evans

F.C.

(1954). Distance to nearest neighbor as a measure of spatial relationships in populations. Ecology, 35, 445–453.

Di Nocera

Terenzi

Camilli

(in press). Another look at scanpath: Distance to nearest neighbour as a measure of mental workload. In de Waard

Brookhuis

K.A.

Toffetti

(Eds.), Developments in Human Factors in Transportation, Design, and Evaluation. Maastricht, the Netherlands: Shaker Publishing.

Diez

Boehm-Davis

D.A.

Hansberger

J.T.

Pinney

M.E.

Hansberger

J.T.

Schoppek

(2001). Tracking pilot interactions with flight management systems through eye movements. Proceedings of the 11th International Symposium on Aviation Psychology. Columbus (OH): The Ohio State University.

Ephrath

A.R.

Tole

J.R.

Stephens

A.T.

Young

L.R.

(1980). Instrument scan – Is it an indicator of the pilot's workload? Proceedings of the Human Factors Society Annual Meeting, 24, 257–258.

Harris

R.L.

Glover

B.L.

Spady

A.A.

(1986). Analytic techniques of pilot scanning behavior and their application. NASA technical paper 2525..

Hart

S.G.

Staveland

L.E.

(1988). Development of NASA-TLX (Task Load Index): Results of empirical and theoretical research. In Hancock

P.A.

Meshkati

(Eds.), Human Mental Workload (pp. 139–183). Amsterdam: Elsevier Science/North Holland.

Hilburn

Jorna

P.G.

Byrne

E.A.

Parasuraman

(1997). The effect of adaptive air traffic control (ATC) decision aiding on controller mental workload. In Mouloua

Koonce

(Eds.) Human-Automation Interaction: Research and Practice (pp. 84–91). Mahwah, NJ: Erlbaum Associates.

Kruizinga

Mulder

de Waard

(in press). Using eye scan pattern-analysis for detecting task strategy differences in a simulated ambulance dispatcher's task. In de Waard

Brookhuis

K.A.

Toffetti

(Eds.), Developments in Human Factors in Transportation, Design, and Evaluation. Maastricht, the Netherlands: Shaker Publishing.

Pelz

J.B.

Canosa

(2001). Oculomotor behavior and perceptual strategies in complex tasks. Vision Research, 41, 3587–3596.

10.

Tole

J.R.

Stephens

A.T. Vivaudou

Eprath

Young

L.R.

(1983). Visual scanning behavior and pilot workload. NASA Contractor Report 3717. Hampton (VA): NASA Langley Research Center.