Figure 5.

(A) Did attention correlate with choice? The first acquisition (left) predicts subsequent choice, despite being uncorrelated with any of the values seen. This demonstrates that participants are reliably biased by the first information they acquire. The final acquisition (right) strongly reflects the choice that is about to be made, with an accuracy of close to 80%: participants rarely choose an option they are not attending to. (B) Which factors influenced choice? An 8-factor model logistic regression model was fitted to each subject's choices, i.e., whether they chose the risky or safe option. We included included a bias term indicating individual risk preference, EV and risk of each option, and also eye movement factors from panel 5A—indicating whether the first and last fixations on each trial were to the risky option. The mean fitted normalized regression coefficients are shown. Error bars are s.e.m. across subjects. Asterisks indicate a regressor is significantly different from zero using t-test across subjects (p < 0.05). The initial fixation regressor was correlated with the final fixation regressor, and did not significantly contribute to choice on this analysis.