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Table 1 Reaction times (in milliseconds) for all conditions in Experiment 2a with the difference between single- and dual-task conditions expressed by dual-task costs (DTcost)

From: The impact of predictability on dual-task performance and implications for resource-sharing accounts

Task type Single task Dual task DTcost 95% confidence interval
M (SD) M (SD) Lower Upper
Random 479 (50) 529 (47) − 10.35%** − 68.020 − 31.019
Sequenced 328 (96) 355 (94) − 8.36%* − 47.200 − 7.558
  1. An asterisk denotes significance, **p < .001, *p < .005