This is Experiment 1 in the **Journal of Vision** article **Schweitzer, R., & Rolfs, M. (2020). Intra-saccadic motion streaks as cues to linking object locations across saccades**. Please note that specifications of degrees of visual angle (dva) reported here in this pre-registration are incorrect due to an observer-screen distance erroneously specified in the experimental code. For the correct values, please refer to the publication above. **Background** Whenever we make rapid eye movements, so-called saccades, the projection of the visual world shifts across our retina at very high speeds. Still, we never consciously experience any visual disturbances while we move our eyes, such as blurry, grayed-out images or smear. The absence of smear has often been attributed to a mechanism, called *saccadic suppression*. Burr & Ross (1982) proposed that “during saccades motion sensitivity is dampened, precisely to avoid the disturbing consequences of saccadic image motion which would follow if it were left intact” (p. 483), leading to the wide-spread notion that we are (motion-) blind during saccades. More recent studies suggest that *intrasaccadic motion perception* is well possible (e.g., Castet & Masson, 2000; Castet et al., 2002) and can even be quite efficient (e.g., Garcìa-Pérez & Peli, 2011; Mathôt et al., 2015). However, it is still unclear whether intrasaccadic perception has a functional role, and if so, to what processes it might contribute. In this study, we will investigate whether and how well intrasaccadic perception can be used to detect object motion occurring during saccades. **Experimental Approach** In the first of two experimental sessions (saccade/active condition), participants are tasked to make a large horizontal saccade towards (16 dva) a noise patch of either high (1-4 cycles/dva) or low spatial frequency (0.25-1 cycles/dva). While the saccade is in mid-flight this noise patch (target stimulus) moves vertically either upwards or downwards. The target moves across a distance of 4 dva at varying travel durations (4 - 17 ms), resulting in high velocities of object motion, ranging from 240 to 950 dva/s. At the end of each movement, a second but similar noise patch (distractor stimulus) will be displayed at a position opposite to the final position of the target. After saccade completion, the participants' task is to indicate whether the target stimulus moved upwards or downwards. If participants are able to process brief intrasaccadic motion signals, they will be able to differentiate between contingent and apparent stimulus movements of target stimulus and distractor stimulus, respectively. The second session (replay/passive condition) simulates the movement of the stimulus across the retina in a fixation condition. To achieve that, data on eye position from the first session will be smoothed and resampled to 1440 Hz, so that the same stimuli as used in the first session can move across the screen at saccadic velocities, creating a retinal stimulation that closely mimics that of the saccade condition. Participants are instructed to identify the movement direction of the original stimulus while now fixating a dot in the center of the screen and the stimuli moving passively across their retina. **References** Burr, D. C., & Ross, J. (1982). Contrast sensitivity at high velocities. *Vision Research*, 22(4), 479–484. Castet, E., Jeanjean, S., & Masson, G. S. (2002). Motion perception of saccade-induced retinal translation. *Proceedings of the National Academy of Sciences*, 99(23), 15159–15163. Castet, E., & Masson, G. S. (2000, February). Motion perception during saccadic eye movements. *Nature Neuroscience*, 3(2), 177–183. Garcìa-Pérez, M. A., & Peli, E. (2011). Visual contrast processing is largely unaltered during saccades. *Frontiers in Psychology*, 2, –. Mathôt, S., Melmi, J., & Castet, E. (2015). Intrasaccadic perception triggers pupillary constriction. *PeerJ,* 3, e1150.