To the right you can see animated simulations of the two-target interference probe trials tested by Blaisdell, Katz, & Cook (under review). Unlike the actual experiment, each demonstration is an animated gif that repeatedly shows the same color trial both within and between demonstrations. The black interval represents a brief inter-trial-interval to simulate display onset. These examples are just intended to give you a feel for the timing and organization of the probes within a trial. In the actual experiment, both shape and color trials were tested and the locations of the target and probe were randomized on each trial.

250 ms probe presented 50 ms after display onset
250 ms probe presented 250 ms after display onset
250 ms probe presented 500 ms after display onset
250 ms probe presented 1000 ms after display onset