15:00 - 16:30
Mon-P3-Poster I-2
Mon-Poster I-2
Room: P3
Anticipatory Actions in a Drag and Drop Task
Mon-P3-Poster I-203
Presented by: Oliver Herbort
Oliver Herbort
Julius-Maximilians-Universität Würzburg
We typically adapt the initial segment of a movement sequence to the requirement of later segments. Such behavior has been well documented in grasp selections for object manipulation or locomotion. I examined whether such behavior can also be observed in a virtual drag and drop task, in which participants first move the mouse cursor onto a virtual object and then drag the object to a target location. A first experiment revealed that this was indeed the case. Click positions on the virtual object where inversely related to the direction and extent of the upcoming drag and drop movement. Surprisingly, participants frequently selected click positions that resulted in longer-than-necessary cursor movements. In a second experiment, it was assessed whether click positions in Experiment 1 were frequently suboptimal because they depended not only on the upcoming drag and drop action but also on other potential drag and drop actions. Experiment 2 corroborated this hypothesis. Click-positions for a specific drag and drop actions depended considerably on other drag and drop actions required in the respective experimental block. In summary, the experiments showed that participants adapt click position to the demands of subsequent drag and drop movements. While the direction of click position adjustments strictly depends on the upcoming movement, the extent of click position adjustments additionally depends on the drag and drop actions that are required in the same context.
Keywords: Action, Motor Control, Anticipation, Mouse Movements, Action Planning