Figure 1.
Experimental setup and procedure.
Subjects were seated behind a table, facing a computer screen. Tactile vibrators were attached to the thumb and index finger of the subject's right hand and the subject responded with the left hand by pressing one of two buttons on a button box. Each trial started with a fixation cross (1st panel from left), followed by the presentation of an object picture (e.g. a tennis ball; 2nd panel from left), visual distractor and tactile stimulation (3rd panel from left) and an object question (right panel). Subjects responded by indicating whether the thumb or index finger was stimulated (Button press 1) and by answering a question about the object (Button press 2).
Table 1.
Object questions used in the different experiments.
Figure 2.
Behavioral data of Experiment 1 and 2.
Inverse efficiency data of Experiment 1 (left panel; attend to action features) and Experiment 2 (right panel; attend to visual feature) for the cross-modal congruency task to pictures representing objects with low (left bars), medium (middle bars) and high manipulability (right bars). Dark bars represent responses to congruent visuo-tactile stimulation and bright bars represent responses to incongruent visuo-tactile stimulation. Error bars represent standard errors.