Table 2.

Experiment 1: Tests of MRI (response frequencies) and tMRI (RTs and start times of the LRPs) for all four observers. Cells shaded in gray indicate cases in which MRI or tMRI failed. Note: BL = baseline, EL = endline.

			Tests of MRI		Tests of tMRI
			Target	Level of other			D
Obs	Test	Contrast	Dimension	Dimension	x2	Comparison	RT	LRP
1	EL	10	top	absent	5.617	Top, absent	0.136	0.183
				present	25.734	Top, present	0.136	0.163
			bottom	absent	1.539	Bottom, absent	0.053	0.245
				present	0.375	Bottom, present	0.028	0.193
		50	top	absent	0.000	Top, absent	0.070 |	0.206
				present	33.689	Top, present	0.205	0.128
2	EL	threshold	top	absent	2.347	Top, absent	0.079	0.072
				present	21.425	Top, present	0.138	0.024
		10	top	absent	0.137	Top, absent	0.065 j	0.229
				present	45.405	Top, present	0.242	0.390
			bottom	absent	0.852	Bottom, absent	0.041^	0.187
				present	0.833	Bottom, present	0.326	0.235
		50	top	absent	6.005	Top, absent	0.219	0.193
				present	38.487	Top, present	0.362	0.259
			bottom	absent	0.791	Bottom, absent	0.091	0.284
				present	0.059	Bottom, present	0.163	0.127
3	BL	50	top	absent	0.084	Top, absent	0.120	0.128
	EL	threshold	top	absent	3.607	Top, absent	0.162	0.165
				present	0.012	Top, present	0.135	0.201
		10	top	absent	0.118	Top, absent	0.260	0.226
				present	3.350	Top, present	0.352	0.135
			bottom	absent	1.769	Bottom, absent	0.325	0.150
				present	0.450	Bottom, present	0.380	0.143
		50	top	present	21.007	Top, present	0.366	0.270
4	EL		bottom	absent	2.286	Bottom, absent	0.111	0.204
				present	0.142	Bottom, present	0084^	0.164
		10	top	absent	1.141	Top, absent	0.050	0.029
				present	3.334	Top, present	0.111	0.400
		50	top	absent	3.687	Top, absent	0.04l|	0.177
				present	23.525	Top, present	0.198	0.209