Pupillary Dynamics Toolbox
Toolbox Testing
Test Case: Emotional valence
The data used to test our toolbox was collected from 24 subject, each of which were exposed to a battery of 180 4 second images using an Eyelink 2 eye-tracking headset . The pupillary responses, changes in pupillary diameter over 4 seconds after exposure to each image were recorded at 500 hz. This led to a total of 4320 individual pupillary response samples, 180 recordings from each subject, each of 4 seconds. However, many of these were be filtered out during preprocessing, dependent on what cutoffs are chosen. Each sample was paired with a categorical valence label, positive, negative, or neutral. Each image or sample also has an associated continuous values associated with the arousal, valence, and luminance labels of the images. Each of these continuous labels were used in the regression training and testing independently, while the categorical valence labels were used for classification.
The run-time testing used all of the samples, and the subject data was duplicated to emulate a larger number of subject. Run-time is not dependent on the accuracy of the model so duplication did not cause problems. Further testing to quantify how the run-time changes with number of images in the assay and the relative length of each pupillary response recording will are in progress.
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