Abstract
One experiment was conducted to examine the influence of bilateral motor actions involving two parameters of movement (flexion vs extension of the arm and laterality as bodily activation of different motivational systems) on judgements. Arm flexion or unilateral right contraction (involving the positive and approach motivational system) has been shown to determine positive evaluations, whereas arm extension or unilateral left contraction (involving the negative and withdrawal motivational system) has led to negative evaluations. Participants (N = 72) had to evaluate neutral Chinese ideographs after performing one of four combined bilateral motor actions (right flexion/left extension, bilateral flexion, bilateral extension, and left flexion/right extension). Results showed that bilateral congruent motor action (right flexion/left extension as two activations of the positive or approach motivational system) and bilateral non-congruent motor action (left flexion/right extension as two activations of the negative or withdrawal motivational system) led respectively to positive and negative judgements, whereas bilateral flexion and bilateral extension determined neutral judgements. These results help understanding of how the motor system operates to process affective cues.
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