For the D0 group, the initiation tone was provided concurrent with onset of the circles array (see panel 2 of Figure 1).
In the mask condition, the four-dot mask remained visible for 320 ms after occlusion of the circles array (see Figure 1 for timeline of experimental events).
The prompt was provided immediately (i.e., the D0 group) or 2000 ms (i.e., the D2000 group) after onset of the circles array.
For the D2000 group, the initiation tone was provided 2000 ms after onset of the circles array (following panel 4 of Figure 1).
In the no-mask condition, the circles array and four-dot mask were extinguished simultaneously (i.e., after the 13 ms presentation) and replaced with a blank screen.
The remaining participants completed their perceptual and reaching trials 2000 ms following onset of the circles array (i.e., the D2000 group).
Half of the participants (n = 15) were cued to complete their perceptual and reaching trials in time with onset of the circles array (0 s delay; i.e., the D0 group).
A detection range of Fe3+ and Ni2+ ions based on the "circle-array" PAD is applicable and reliable in 0.2 6.0 mM and 0.4 4.0 mM, respectively.
But it is Schepps who specializes in circles, arraying them colorfully in rows whose stated inspirations include the sun and agate, the translucent stone that often contains eye-like patterns.
Beamwidths of clicks recorded with the linear (red circles) and star-shaped (black circles) arrays plotted as a function of the clicks' centroid frequencies.
Participants had to search for the target item in a circle stimulus array, which had a diameter of 20 cm and included one target and 19 distracters.
