Submission 454
What Goes Around Comes Around? Sequential Biases in Non-Categorical Action Decisions
Posterwall-52
Presented by: Christoph Geißler
Task-irrelevant contextual cues (distractors) are known to influence action control: repeating a distractor typically speeds and improves performance when the response repeats, but impairs performance when the response changes. Vice-versa, distractor changes facilitate response changes, but impair response repetitions. These effects are commonly attributed to automatic retrieval of prior action episodes. However, prior research in this area generally employed tasks with a small number of discrete response options, limiting insight into the specific biases and dynamics of sequential action planning. In this study, we examine how distractor repetitions and changes shape continuous response execution. Participants judge the font color of a word by selecting a position on a continuous color wheel (0–359°). Across trials, both the task-irrelevant word identity (the disstractor) and the font color can repeat or change. This design allows us to assess not only reaction times and accuracy but also directional biases in response trajectories and the similarity between consecutive responses. We expect repeating contextual cues to bias responses toward the previous response location (retrieval-driven attraction), whereas contextual changes should bias responses away from the previous location (shielding of prior representations). Moreover, repetition benefits should follow a center-surround inhibition profile, with strong distractor repetition benefits near the previous response location, a gradual shift toward distractor change benefits at intermediate angular distances, and minimal distractor-related biases at large distances. These findings will clarify how episodic retrieval processes shape the fine-grained dynamics of ongoing action control.