Abstract
Two Spoke Tasks were evaluated for their qualifications for use in repeated-measures experiments. Fashioned after the Reitan Trail Making Test (Form A), the Experimental Task showed linear trends in means and homogeneous variances from the first day. Differential stability was indicated by statistical analysis from the first day with reliability of 0.43; however, graphical analysis indicated increasing reliability and differential instability for later trials. From the first day, the Control Task showed linear trends in means, homogeneous variances, and differential stability with reliability of 0.80. The Control Task was recommended for inclusion in test batteries for repeated-measures applications.
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