Mon, 21 Sept 2026
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12:00

Leibniz Research Centre for Working Environment and Human Factors
When sensory information is no longer available, working memory (WM) allows us to use what we remember to guide upcoming actions. Here, we asked how the brain turns information held in WM into a prepared response, and how this process depends on attention, available actions, and task demands. In an EEG experiment, participants remembered two orientations and later reproduced them by rotating a visual probe with one hand. By providing advance information about the upcoming probe, we could test when participants prepared a response before they were required to act. We tracked this preparation through changes in 8-30 Hz EEG activity associated with the response hand. Our results show that action preparation can be initiated by the responses that are currently available at encoding: when only one hand could be used, participants began preparing that hand even before receiving an explicit cue. At the same time, simply holding information in WM was not sufficient to trigger response preparation. The relevant memory had to be in a prioritized (active) representational state. Changing the task demands did not remove this dependence on selective attention. Finally, advance knowledge about an upcoming response improved performance specifically for the item that was not currently prioritized (latent) and required less relocation of visual attention within WM. Together, these findings suggest that WM can support behavior by transforming remembered sensory information into an action plan. Once such a plan is prepared, later behavior may rely less on visually attending to and retrieving the original memory representation.
