To be or not to be...included in an event file: integration and retrieval of distractors in stimulus-response episodes is influenced by perceptual grouping.

The binding of stimulus and response features into stimulus-response (S-R) episodes or "event files" is a basic process for the efficient control of behavior. However, relevant information is usually accompanied by information that is irrelevant for the selection of action. Recent studies showed that even irrelevant information is bound into event files. In this study, we investigated the boundary conditions of distractor-response binding and subsequent distractor-based response retrieval processes. In particular, we tested whether the inclusion of distractor information into S-R episodes is modulated by whether the distractor and target stimulus are perceived as belonging to the same object or as belonging to different objects. We argue that distracting information is only bound into S-R episodes if it is perceived as belonging to the same object as the relevant information, whereas no binding occurs when the distracting information is perceived as belonging to a separate object. In 6 experiments, we found evidence for the modulation of distractor-response bindings according to perceptual grouping principles.