The display contained a typed note from the president explaining that he had written the speech.
On each trial, the display contained a total of 16 diamonds, equally distributed to the left and right side of the fixation circle (0.2°).
The task for the observers was similar: Indicate whether or not the display contained a target.
Importantly, the display contained no interocular conflict, since the images presented to the two eyes were exactly the same.
In that experiment, observers were simply instructed to indicate whether or not the display contained a target (nonspeeded).
In Experiments 1, 2, 3, 5, 6 and 7, observers performed a speeded two-alternative forced choice task, indicating as accurately and rapidly as possible whether or not the display contained a target.
As shown in Fig. 5, the displays contained images of two colored bins, one on the left and one on the right of the screen.
The displays contain a number of features: first-order motion, second-order motion, motion direction, orientation, position, etc.
They had to discriminate the motion speed between two motion displays undergoing similar motion by identifying which of the displays contained faster moving dots.
