File:PremotorTheoryOfAttention.jpg

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    A) Experimental set up used by Craighero, Fadiga, Rizzolatti, and Umiltà, (1999) to verify the influence that the preparation of a grasping movement determines on the detection of objects sharing or not the same intrinsic properties of the to-be-grasped object. Participants were seated in front of the computer screen with their head positioned on a chin rest and pressing a switch with their right hand shaped in a pinch position. B) Schematic drawing of the experimental design. The go signal consisted of one of two pictures: a rectangle rotated 45° clockwise or a rectangle rotated 45° counterclockwise. The response consisted of grasping, as fast as possible, a red plastic bar inserted inside a rectangular hole hollowed in a white plastic disk and glued to it, located in front of the switch (distance: 12 cm), out of the participant's sight. The orientation of the bar could be either clockwise or counterclockwise oriented. There were two experimental conditions. In the congruent condition, the go signal was a rectangle the orientation of which matched the orientation of the bar to be grasped. In the incongruent condition, the go signal was a rectangle the orientation of which did not match the orientation of the bar to be grasped. C) Main results indicated that reaction times (the time between the go signal and the releasing of the switch) were faster for congruent condition than for incongruent condition, suggesting that motor preparation determines a faster processing of object intrinsic properties shared by both the to-be-grasped object and the visual one: when one is ready to grasp an object, she is faster in recognizing it. (CON, congruent condition; INC, incongruent condition).

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    current22:44, 8 September 2009Thumbnail for version as of 22:44, 8 September 2009894 × 765 (45 KB)Andrew Whitford (Talk | contribs)A) Experimental set up used by Craighero, Fadiga, Rizzolatti, and Umiltà, (1999) to verify the influence that the preparation of a grasping movement determines on the detection of objects sharing or not the same intrinsic properties of the to-be-grasped

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