[1]Kanfer-Ackerman Air Traffic Controller Task(c) program is copyrighted software by Ruth Kanfer, Phillip L. Ackerman, and Kim A. Pearson, University of Minnesota.

[2]Ackerman has used multiple measures to gauge performance, including cumulative score, number of planes landed, number of errors made, and reaction time to wind change.

[3]Ackerman (1988) used mean reaction time to wind change, as the dependent measure of performance. However, we chose to use cumulative score as the dependent measure of performance, because that is what subjects are trying to optimize in this task.

[4] All t-ratios in the regression analyses we present have 1 d.f. and are significant at p < .001.