Mathematical Processing
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Mathematical Processing Task - English
The mental arithmetic task created by Englund et al (1987) with problems of differing complexity and numbers of operations
Mental Arithmetic Task - English
The mental arithmetic task created by Turner et al (1986) with true/false subtraction problems.
References

Turner, J. R., Hewitt, J. K., Morgan, R. K., Carroll, D., Sims, J., & Kelly, K. A. (1986). Graded mental arithmetic as an active psychological challenge. International Journal of Psychophysiology, 3, 307-309.
Englund, C.E., Reeves, D.L., Shingledecker, C.A., Thorne, D. R., Wilson, K.P., & Hegge, F.W. (1987). Unified Tri-Service Cognitive Performance Assessment Battery (UTC-PAB). 1. Design and Specification of the Battery (No. NHRC-87-10). Naval Health Research Center San Diego, CA.
Girdler, S. S., Turner, J. R., Sherwood, A., & Light, K. C. (1990). Gender differences in blood pressure control during a variety of behavioral stressors. Psychosomatic Medicine, 52, 571- 591.