Masked positions of target stimuli based on the two second-order conditional sequences – SOC1 and SOC2 – presented on the recognition test.

Trained/untrained status of each set of 12 six-item sequences was determined by training on the stereoscopic SL task (SOC1 or SOC2). Binocular positions for SOC1 and SOC2 are identical across matched pairs of the six-item recognition sequences. Masked locations 1, 2, 3, 4, read from left to right for masked four-location placeholder array. L = Left placeholder; R = Right placeholder of the binocular fused view.