This project contains the data for the paper : **Retinal error signals and fluctuations in eye velocity influence oculomotor behavior in subsequent trials** from Alexander Goettker, published in the Journal of Vision. A detailed description of the data can be found in a readme file. The goal of the project was to investigate which signals (retinal or extra-retinal) contribute to trial-by-trial effects on eye movement behavior. The main result is that mainly retinal error signals are integrated in reliability-weighted fashion to update oculomotor behavior. In addition, also general fluctuations in eye velocity over the course of the experiments had an effect. **Abstract** The oculomotor system makes use of an integration of previous stimulus velocities (the prior) and current sensory inputs to adjust initial eye speeds. The present study extended this research by investigating the roles of different retinal or extra-retinal signals for this process. To test for this, participants viewed movement sequences that all ended with the same test trial. Earlier in the sequence, the prior was manipulated by presenting targets that either had different velocities, different starting positions, or target movements designed to elicit differential oculomotor behavior (tracked with or without additional corrective saccades). Additionally, these prior targets could vary in terms of contrast to manipulate reliability. When the velocity of prior trials differed from test trials, the reliability-weighted integration of prior information was replicated. When the prior trials differed in starting position, significant effects on subsequent oculomotor behavior was only observed for the reliable target. While there were also differences in eye velocity across the different manipulations, they could not explain the observed reliability-weighted integration. When comparing the same physical prior trials but tracked with additional corrective saccades the eye velocity in the test trial also differed systematically (slower for forward saccades, faster for backward saccades). The direction of the observed effect contradicts the expectations based on perceived speed and eye velocity, but can be predicted by a combination of retinal velocity and position error signals. Together, these results suggest that general fluctuations in eye velocity as well as retinal error signals are related to oculomotor behavior in subsequent trials.