Dynamic saccade context triggers more stable spatiotopic object-location binding.

Despite receiving visual inputs in eye-centered (retinotopic) coordinates, we perceive the world- centered (spatiotopic) locations of objects. There is long-standing debate about how object representations attain visual stability across eye movements, with many studies reporting persistent retinotopic effects even for higher-level object-location binding. But these studies are generally conducted in fairly static experimental contexts. Might spatiotopic object-location binding only emerge in more dynamic saccade contexts? In the present study, we investigated this using the Spatial Congruency Bias paradigm. In a more static (single saccade) context, we found purely retinotopic binding, as before. However, robust spatiotopic binding emerged in the more dynamic (multiple frequent saccades) context. We further isolated specific factors that modulate retinotopic and spatiotopic binding. Our results provide strong evidence that dynamic saccade context can trigger more stable object-location binding in ecologically-relevant spatiotopic coordinates, perhaps via a more flexible brain state which accommodates improved visual stability in the dynamic world.