Corrective saccades influence velocity judgements and interception
In daily life we often interact with moving objects in tasks that involve analyzing visual motion, like catching a ball. To do so successfully we track objects with our gaze, using a combination of smooth pursuit and saccades. Previous work has shown that the occurrence and direction of corrective s...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2019 |
| País: | España |
| Institución: | Universidad de Barcelona |
| Repositorio: | Dipòsit Digital de la UB |
| OAI Identifier: | oai:diposit.ub.edu:2445/177227 |
| Acceso en línea: | https://hdl.handle.net/2445/177227 |
| Access Level: | acceso abierto |
| Palabra clave: | Percepció visual Seguiment de la mirada Visual perception Eye tracking |
| Sumario: | In daily life we often interact with moving objects in tasks that involve analyzing visual motion, like catching a ball. To do so successfully we track objects with our gaze, using a combination of smooth pursuit and saccades. Previous work has shown that the occurrence and direction of corrective saccades leads to changes in the perceived velocity of moving objects. Here we investigate whether such changes lead to equivalent biases in interception. Participants had to track moving targets with their gaze, and in separate sessions either judge the targets' velocities or intercept them by tapping on them. We separated trials in which target movements were tracked with pure pursuit from trials in which identical target movements were tracked with a combination of pursuit and corrective saccades. Our results show that interception errors are shifted in accordance with the observed infuence of corrective saccades on velocity judgments. Furthermore, while the time at which corrective saccades occurred did not afect velocity judgments, it did infuence their efect in the interception task. Corrective saccades around 100ms before the tap had a stronger efect on the endpoint error than earlier saccades. This might explain why participants made earlier corrective saccades in the interception task. |
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