INB Lunch-Seminar

Visuelle Aufmerksamkeit und die Steuerung von zielgerichteten

Blick- und Zeigebewegungen

Prof. Dr. Heiner  Deubel
Department Psychologie,
Ludwig-Maximilians-Universität, München

In recent years, ample evidence has accumulated suggesting that a shift of visual attention precedes goal-directed movements directed to a visual target. In the first part of this presentation, I will discuss evidence in favour of this claim for saccades and manual pointing, and will discuss conditions under which attention and movement preparation may be dissociated. In the second part of the talk, experiments will be presented that extend these basic findings by investigating covert selective processing in more complex movement situations, i.e., for sequential eye and hand movements directed to two or three targets, and for grasping an object.

Finally, some of our experimental results show that people don't always know what they are looking at, or at least, when they are looking where. We found that visual stimuli presented at the saccade target location as early as 250 ms before saccade onset were reported as occurring after the saccade. We believe this occurs because shifts of visual attention are mistaken for shifts of the eyes.

Zeit: Freitag, den 7. Juli 2006, 12:45 Uhr c.t.

Ort: Institut für Neuro- und Bioinformatik
        Seminarraum (1. OG, Raum 17),
        Ratzeburger Allee 160 (Geb. 64, 1. OG)