SaccadeJS：网页浏览器中的眼动追踪工具，用于行为实验

Webcam eye tracking allows researchers to study eye movements in large, geographically diverse online samples, but its accuracy has limited it to coarse comparisons, such as which half or quadrant of the screen a participant is looking at. We introduce SaccadeJS, an open-source webcam eye tracker that runs entirely in the participant's browser. SaccadeJS uses a neural network to transform images of the eyes to features, which a ridge regression maps to screen positions. The network can be rapidly calibrated by computing new regression weights on a sample of fixations at known locations. To tra