PUB - Publikationen an der Universität Bielefeld

To understand our brain it is often useful to go back to childhood to observe how children solve tasks during play. But also adult brains show important reactions in simple tasks. For building a figure with bricks we have to distinguish between different objects at different points in time. This means, that at different steps, objects have different relevancies for the situation. But how do we decide for an object? In this study we want to find out, how our brain react by fixating tasks dependent relevant and irrelevant objects. We combine EEG and eye-tracking tools in a real life environment. Coming from the idea of playing in childhood, we choose figures of coloured bricks for a sorting task. All objects were easy to distinguish from each other by form and colour. Participants solved these tasks by using different objects, either by building them up or by only imagine to build up and following the process only with the eyes, without arm movements and grasping. From last studies we know already the influence of task dependent object relevance on eye movements, like the number of fixations and the fixation duration, and also the neurocognitive signature, measured with fixation-related potentials (FRP), in a computer screen based task. In the current study we want to make it more applicable and want to add movements into a real life environment, by grasping and interacting with the objects. On one hand these results should show if it is technical feasible to add movements into a real life environment and on the other hand we want to distinguish between objects by using the brain activity marked on fixation onsets.