Figure 1.

Gaze-based spatial prediction task. (A) A digit was displayed between flanking Xs for 150 ms, before being masked with a third X. The participant had unlimited time to indicate with a key press whether the digit was even or odd. Feedback then appeared for 500 ms: a filled circle indicated a correct response and an unfilled circle indicated incorrect. The ITI was 750 ms. Total reward for each block of 40 trials was represented by the width of the bar at the bottom of the screen. (B) The generative mean was selected from a uniform distribution 22.14° wide. Gaussian generative distributions in the No, Low, and High Noise conditions had widths of σ<0.01°, σ=1.67°, and σ=4.14° respectively. Digit locations were selected from these distributions, and the mean was resampled with a probability of 0.1. In the Max Noise condition, digit locations were selected from the uniform distribution on every trial.