Table 2.

Overview of performance on valid-signal trials: Probability of responding on a valid-signal trial [p(respond|signal)], average valid change-signal delay (CSD), average reaction time for go responses on signal–respond trials (signal–respond RT), the difference between signal–respond RT and no-signal RT (both correct and incorrect responses were included when mean no-signal RT was calculated), and average reaction time for the change response (Change RT), as a function of Group (consistent-mapping vs. varied-mapping) and Experiment. Change RT corresponds to the time interval between the presentation of the valid signal and the left/right key press.

	p(respond|signal)		CSD		Signal–respond RT		No-signal RT minus signal–respond RT		Change RT
	M	sd	M	sd	M	sd	M	sd	M	sd
Experiment 1
CM	0.480	0.069	352	172	601	151	−63	44	597	97
VM	0.472	0.081	348	145	682	117	−12	54	649	84
Experiment 2
CM	0.461	0.070	353	134	679	115	−48	72	696	85
VM	0.479	0.076	282	129	741	109	30	73	797	108
Experiment 3
CM	0.490	0.061	253	103	546	86	−22	61	682	101
VM	0.503	0.083	272	126	606	109	−4	68	667	84
Experiment 4
CM	0.490	0.058	279	122	557	97	−41	43	620	64
VM	0.490	0.073	275	124	635	117	12	46	659	137

Note: Change RT was higher in the varied-mapping condition than in the consistent-mapping condition in Experiments 1–2 (both p’s < .001), but the group differences were not statistically significant in Experiments 3 and 4, p = .63 and p = .20, respectively.