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Table 2 Reaction times (in milliseconds) for all conditions in the double-pedal experiment (Experiment 2b) 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 511 (48) 552 (58) − 7.90%** − 60.480 − 20.311
Sequenced 336 (69) 386 (102) − 14.69%* − 91.600 − 7.135
  1. An asterisk denotes significance, **p < .001, *p < .005