This repository contains behavioral and eye-tracking data files of the paper “Decomposing loss aversion from gaze allocation and pupil dilation” by Feng Sheng, Arjun Ramakrishnan, Darsol Seok, Wenjia Joyce Zhao, Samuel Thelaus, Puti Cen, Michael Louis Platt. Behavioral data is stored in decision.csv that includes six columns: - Subject: subject ID. - Run: 1=the run when gain is on the left, 2=the run when gain on the right; note, this does not indicate run order. - Gain: the magnitude of gain. - Loss: the magnitude of loss. - Response: 1=Accept the gamble, 0=Reject the gamble. - RT: response time (millisecond). Eye-tracking data is stored in eye.csv that includes either columns: - Subject: subject ID. - Run: 1=the run when gain is on the left, 2=the run when gain on the right; note, this does not indicate run order. - StimulusName: 0=fixation; otherwise, for any number larger than 101, the thousands place and the hundreds place together indicate the magnitude of potential gain, and the tens place and the ones place together indicate the magnitude of potential loss. For example, 106 indicates the potential gain of the gamble is 1 and the potential loss is 6. - TimeSignal: time referenced to the start of a run (millisecond). - GazeX: X coordinate of gaze; left box, x >=260 and x <= 556; right box, x>=724 and x<=1020; 0 or -1 are missing data; screen resolution, 1280 × 1024. - GazeY: Y coordinate of gaze; 0 or -1 are missing data; both left box and right box, y >= 367 and y <= 657. - PupilLeft: the diameter of the left pupil (millimeter); 0 or -1 are missing data. - PupilRight: the diameter of the right pupil (millimeter); 0 or -1 are missing data.