关键词: 具身认知, 利手, 空间情感效价, 眼动, 躯体特异性假设

Abstract: The purpose of this study is to explore the relationship between handedness and implicit left and right spatial affective valence, and the respective roles of fluency and spatial emotion in this relationship. Previous studies used the task of “spatial stimulus preference”, and found that the subjects preferred the stimulation on the same side of the dominant hand. The problem with this task is that it is impossible to distinguish the roles of hand action fluency and spatial emotion. Some studies found the independent effect of spatial emotion by tasks without hand using, but still cannot explain the relationship between hand movement fluency and spatial emotion.Recently, researchers found that there is a dominant effect of hand movement in the relationship between hand placement space and hand movement by cross hand experiments. However, there is little study to distinguish and compare the role of stimulation presenting space and hand movements in spatial affective tasks. Based on the emotional Stroopparadigm,the experimentwas designedas2 (hand: right hand vs. left hand) × 2 (picture presentation position: left vs. right) × 2 (picture valence: negative vs. positive). The subjects were required to judge the color of “+” presented on emotional face pictures which randomly appeared on the left or right space of screen.The reaction time and eye movement data were recordedas dependent variables. In the two experiments, a total of 50right- andleft-handers were selected by Edinburgh Handedness Inventory, and the experimentwas programmedby Experience Builder of SR ResearchCompany. Eye movement data of the right eye were recorded with Eye-Link 1000Plusdesktop eye tracker at a sampling frequency of 1000 Hz. The results showed that the reaction speed wasfaster by right hand than by left handfor right-handers(p<.05), but there was no such speed difference for left-handers. The results of eye movement showed that when subjects used the left hand to response, the proportion of fixation time on the positive picture was lower than negative picture when the pictures were presented by dominant side(p<.05), while the proportion of fixation time onthe positive picture was higher than negative picture when the pictures were presented bynon-dominant side(p<.05). The eye movementresults indicate that the spatial emotional preference existents at the implicit level. The results support the leading role of hand fluency in the individual response speed of right-handers, and dominant hand fluency and implicit spatial affective preference are reflected by reaction speed and space fixation percentage respectively,which proves the independent existence of the two elements.However, there is no interaction between space emotion and hand movement fluency in reaction speed. The discussion part explains the possible reasons why there is no dominant hand effect for left-handers, why implicit spatial affective preference occurs only when left hand reacts, and why manual fluency and spatial affective preference do not interact. In summary, the resultsshow that the reaction speed of right-handersis dominated by hand motor fluency, and hand motor fluency and implicit spatial preference are independent components that can be separated from each other.

Key words: embodied cognition, handedness, spatial emotion valence, eye movement, body-specificity hypothesis