Testing the Efficiency and Effectiveness of Soldier Performance Under Increasing Task Demand

Abstract

Combat is inherently a demanding situation which may increase stress, heighten arousal, and increase anxiety. The Processing Efficiency Theory (PET) was specifically developed to account for how anxiety influences performance. Therefore, the PET provides a potential theory to explain the positive and negative changes in performance in a combat environment. This study is the first attempt to examine PET in the military domain. Using the Small Arms Simulator Testbed (SAST), we investigated the relationship between processing efficiency and performance, considering mental workload, stress, and anxiety effects. Shooting performance effectiveness measures were target acquisition and friend/foe discrimination. Changes in processing efficiency were manipulated by varying degrees of working memory demand and sustained information transfer. The results indicated that shooting performance and processing efficiency, as well as mental workload demands, decreased as the global demand of both tasks increased. Further analyses for anxiety and stress and future directions are discussed.

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References

Baddeley

A. D.

(1986). Working memory. Oxford, UK: Clarendon Press.

Eysenck

M. W.

(1996). Anxiety, processing efficiency theory and performance. In Battmann

Duke

Processes of the molar regulation of behavior (pp. 99–104). Scottsdale, AZ: Pabst Science Publishing.

Eysenck

M. W.

Calvo

M. G.

(1992). Anxiety and performance: The processing efficiency theory. Cognition and Emotion, 6, 409–434.

Hockey

R. G.

(1997). Compensatory control in the regulation of human performance under stress and high workload: A cognitive-energetical framework. Biological Psychology, 45(1–3), 73–93.

Hancock

P. A.

Warm

J. S.

(1989). A dynamic model of stress and sustained attention. Human Factors, 31 (5), 519–537.

Jones

Swain

A. B. J.

(1992). Intensity and direction dimensions of competitive state anxiety and relationships with competitiveness. Perceptual and Motor Skills, 74, 467–472.

Jones

Swain

A. B. J.

Hardy

(1993). Intensity and direction dimensions of competitive state anxiety and self-confidence. Journal of Sports Sciences, 11, 533–542.

Woodman

Hardy

(2001). A case study of organizational stress in elite sport. Journal of Applied Sport Psychology, 13 (2), 207–238.

Yeh

Wickens

C. D.

(1988). Dissociation of performance and subjective measures of workload. Human Factors, 30 (1), 111–120.

10.

Yerkes

R. M.

Dodson

J. D.

(1908). The relation of strength of stimulus to rapidity of habit formation. Journal of Comparative Neurology & Psychology, 18, 459–482.

11.

Zijlstra

F. R. H.

(1993). Efficiency in work behavior. A design approach for modern tools. PhD thesis, Delft University of Technology. Delft, The Netherlands: Delft University Press.

12.

Zijlstra

F. R. H.

Van Doorn

(1985). The construction of a scale to measure perceived effort. Delft, The Netherlands: Department of Philosophy and Social Sciences, Delft University of Technology.